
样式: 排序: IF: - GO 导出 标记为已读
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Hydro-mechanical insights for radioactive waste disposal from gas injection experiments in shale Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2025-02-03 Qazim Llabjani, Alessio Ferrari, Paul Marschall, Lyesse Laloui
Disposal of radioactive waste in deep geological repositories relies on the integrity of geological barriers, where gas migration can compromise long-term safety. This study examines the hydro-mechanical response of a shale under varying gas pressure build-up rates, using gas injection tests conducted in a high-pressure oedometer cell to simulate in-situ stress conditions. The research highlights that
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A data-driven method for the deformation analysis of layered rocks Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2025-02-01 Fanding Feng, Diansen Yang, Qinghui Jiang
This paper proposes a data-driven method for the deformation analysis of layered rocks, which consists of generating a stress–strain database and using a data-driven computational solution. The method does not require defining the material's constitutive relationship to conduct analysis of layered rock deformation under loading of the same material. First, the data-driven identification (DDI) algorithm
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A novel approach of mitigating fault-slip induced dynamic disasters based on liquid super-lubricity Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2025-01-29 Jintong Zhang, Wei Song, Jun Wu, Yue Shen, Zhihong Zhao, Jinjin Li
Fault-slip induced dynamic disasters, such as seismicity and rockburst, pose significant risks to various subsurface engineering projects, and the currently used mitigation methods often involves strategies of modulating in-situ stresses in the surrounding rocks near fault planes timely. Here, we propose an alternative strategy for mitigating fault-slip induced dynamic disasters in terms of reducing
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A new downgrading system for weak rock mass Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2025-01-29 Hao Zhai, Ismet Canbulat, Chengguo Zhang, John Watson, Min Gao
Estimating the strength of weak rock mass is challenging in rock mechanics and rock engineering. This study introduces the development of a downgrading system for weak rock mass strength (GSIw), a novel methodology designed to bridge the gap between soil and hard rocks. A conceptual model is proposed, which simplifies weak rock mass downgrading by considering the influence of the rock matrix, joint
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Enhancing fracture conductivity in carbonate formations through mineral alteration Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2025-01-27 Xiang Chen, Haitai Hu, Pingli Liu, Juan Du, Maoxing Wang, Hongming Tang, Zhaoxu Deng, Guan Wang, Fei Liu
In geothermal, oil, and gas reservoirs, the conductivity of hydraulic or acid-etched fracture determines efficient and economical resource exploitation. Proppant embedding or acid-rock reaction weakening rock leads to a sharp decline in fracture conductivity. Mineral alteration is a technique of in-situ transformation of existing minerals into harder minerals to improve rock strength, and diammonium
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Visualization of the dynamic propagation of two simultaneously-stimulated hydraulic fractures: Competition and interaction Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2025-01-25 Luchao Wang, Kang Duan, Qiangyong Zhang, Xiufeng Zhang, Chuancheng Liu, Di Wang
Deepening the understanding of the dynamic propagation and interaction of multiple hydraulic fractures is the key to the optimization of hydraulic fracturing design. By conducting two-hole hydraulic fracturing experiments on transparent polymethyl methacrylate (PMMA) samples, we visualize the dynamic propagation of fractures stimulated from two holes in three dimensions with the aid of high-speed cameras
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Meso-mechanical mechanism of ordered mica alignment on the progressive failure process of granite under different lateral stress directions Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2025-01-24 Chen Fan, Xia-Ting Feng, Jun Zhao, Cheng-Xiang Yang, Meng-Fei Jiang
Accurately understanding the mechanical properties of surrounding rock is crucial for minimizing the risk of surrounding rock instability. In a deep TBM tunnel, mica minerals in the surrounding rock exhibit an intermittently oriented alignment, which is considered one potential cause of time-delayed failures. Under the same true triaxial stress, creep tests were conducted on granite with different
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Thermo-hydro-mechanical calibration modelling of the full-scale emplacement experiment and sensitivity analyses Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2025-01-24 Ruiping Guo, Scott Briggs
To understand the mechanism of the coupled thermo-hydro-mechanical (THM) processes in a repository, many laboratory or in-situ experiments have been carried out. One of these experiments is the Full-scale Emplacement Experiment (FE-Experiment) at the Mont Terri Underground Rock Laboratory. The FE-Experiment simulated the construction, waste emplacement, backfilling and early post-closure evolution
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Effect of stress waves on fault slip using photoelastic analysis and numerical simulation Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2025-01-24 N.B. Zhang, Z.X. Zhang, R.L. Shan, Q.X. Qi, S.K. Zhao, Y.S. Guo, Y.Z. Li
In coal mines, fault slips are often affected by stress waves originated from rock fracture during mining, but the effect of stress waves on a fault slip is still unclear. To understand such an effect, photoelasticity experiments and numerical simulation were carried out in this study, based on the thrust fault F16 in the Yima coal field, China. Three factors including stress wave sources, stress wave
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Energy evolution and deformation features of re-loading creep failure in yellow sandstone after cyclic water intrusion Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2025-01-24 Yongde Liu, Huijian Zhang, Zhe Qin, Xuxin Chen, wenlong Liu
To assess the long-term stability of rock bodies after excavation or slope excavation under external forces, uniaxial compression, and graded loading and unloading creep tests were performed on variable-saturation yellow sandstone after cyclic water intrusion. The energy evolution and deformation mechanisms of rocks during loading, creep, unloading, and holding were analyzed. Furthermore, the reloading
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Thermally induced fracture modeling during a long-term water injection Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2025-01-23 Yuhao Liu, Keita Yoshioka, Tao You, Hanzhang Li, Fengshou Zhang
Significant volumes of water are injected into the subsurface for purposes such as maintaining reservoir pressure, enhancing production efficiency, or water disposal. In these operations, injection pressures are typically kept low to prevent the formation from fracturing. However, fractures may still be induced even at low injection pressures if the injected water cools the formation, causing thermal
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Experimental study of deformation induced by high-pressure methane adsorption and desorption: Insights into anisotropy and hysteresis characteristics Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2025-01-21 Songwei Wu, Liang Wang, Chao Liu, Sheng Su, Zhuang Lu, Xinxin He, Quanlin Yang, Liwen Guo
Adsorption deformation of the coal matrix significantly influences gas migration and enhances recovery in coal reservoirs. In deep coal seams, abnormally high fluid pressures complicate the accurate quantification of absolute adsorption using traditional models, affecting the assessment of adsorption deformation. To address this, this study conducted synchronous adsorption/desorption and strain testing
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BIM for mining - Automated generation of information models using a parametric modelling concept Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2025-01-18 Jyrki Salmi, Zehao Ye, Jelena Ninic, Rauno Heikkilä
The adoption of Building Information Modelling (BIM) in construction has greatly improved project delivery, collaboration, and automation. However, its application in mining remains underdeveloped due to the unique challenges of mining projects, such as their vast scale, complexity, and heterogeneity. The present study aims to explore the characteristics and potential for adoption of BIM technology
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A mathematical model for the shape prediction of bedded salt cavern used for energy storage Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2025-01-18 Tao He, Tongtao Wang, Chunhe Yang, Youqiang Liao, Dongzhou Xie, Zhekang Ding, J.J.K. Daemen
The vertical layering and anisotropic characteristics of bedded rock salt are different from those of salt mounds, and the brine reinjection operation during the cavern creation process makes it difficult to predict the distribution of brine concentration in the cavern. The accumulation of slag in the complex cavern affects the brine flow characteristics and cavern volume, which makes the water-soluble
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Identification and thermal characteristics of linear discontinuities on a high-steep slope using UAV with thermal infrared imager Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2025-01-13 Wen Zhang, Han Yin, Jianping Chen, Changwei Lu, Tengyue Li, Bo Han, Zihan Zhao, Jia Wang, Junqi Chen
The discontinuity system exerts significant control over slope deformation and failure. Nevertheless, the automatic identification of these discontinuities remains a challenging task, particularly concerning linear discontinuities. Current methodologies are insufficient in detecting linear discontinuities, let alone conducting an analysis of their internal parameters. Consequently, this leads to imprecise
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Experimental validation and mechanistic elucidation of crack division and two-phase flow-mediated sealing in coalbed methane extraction boreholes Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2025-01-13 Dezhi Ran, Jianwei Cheng, Yejiao Liu, Qiang Fu, Zhiyuan Ma, Jing Mei
Coalbed methane (CBM) has emerged as a key clean fuel. The efficient recovery of CBM heavily relies on the materials used to seal cracks in gas drainage boreholes. This study divides the range of cracks into different single width cracks. A method of using two-phase particle mucus sealing material (PMSM) based on the “Liquid-Sealing-Gas (LSG)" principle is proposed to address the limitations of traditional
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Analytical solutions of two-liner tunnels constructed in time-dependent plastic rocks considering loading-unloading stress paths Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2025-01-13 Hua-ning Wang, Qian Liu, Fei Song, Rui-cong Fu, Ming-jing Jiang
The mechanical behaviours of soft rocks are time-dependent and significantly influenced by the loading and unloading histories. The main objective of this study is to investigate the tunnelling behaviours of supported tunnels constructed in time-dependent plastic geotechnical materials, taking into account the tunnelling advancement, the viscoelastic-plastic behaviour of host rocks, sequentially installation
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Water-rock interaction-induced degradation of Jinping marble in in-situ environments: A multi-scale analysis of mechanical behavior Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2025-01-11 Chendi Lou, Ru Zhang, Zetian Zhang, Li Ren, Jing Xie, Kun Xiao, Mingchuan Li, Jifang Zhou, Anlin Zhang
In deep engineering practices, surrounding rocks are often subjected to long-term interactions between high pore pressure and high geostress environments, necessitating a thorough understanding of water-rock coupling effect under in-situ conditions. This study investigates these interactions by replicating the deep, high-pressure environment of China Jinping Underground Laboratory (CJPL) through a
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A nonlinear inversion method for predicting the in-situ stress field in deep coal seam based on improved long short-term memory neural network Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2025-01-09 Jiaxing Zhou, Bisheng Wu, Yuanxun Nie, Haitao Zhang
Existence of discontinuous geological structures, such as folds and fault, poses a great challenge in predicting the in-situ stress fields (ISSF). This paper proposes a discontinuous intelligent inversion method to predict the ISSFs in the deep coal seam area (DCSA) of the Shanghai Temple, which exhibits distinct discontinuous geological features. The proposed method consists of three key components
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Roof stability for rock cavities and tunnels: Revisiting limit state plastic analysis Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2025-01-08 Dowon Park
Previous observations of the roof stability analyses for deep-depth tunnels in continuum rock mass suggest that the critical roof failure mechanism involves a π/2-rotation of the failure envelope utilized in the analysis. In this study, the results obtained from the kinematic approach of the limit analysis and limit equilibrium method demonstrated that the failure profile of a roof collapse in a physical
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Elastic wave propagation and attenuation across cemented rock fractures under tension Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2025-01-07 Hui Yang, Qi Zhao, Dongya Han, Qinghua Lei, Huanyu Wu, Xiaolin Huang, Zhiyi Chen, Yu Huang
Tensile loading plays a critical role in geological processes like landslides and earthquakes, as well as engineering applications such as hydraulic fracturing and tunnel excavation. We investigate elastic wave behavior across cemented rock fractures under tensile stress conditions. Ultrasonic measurements and uniaxial direct tension tests were performed concurrently on quartz diorite and diabase specimens
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Leveraging negative pore pressure to constrain post-injection-induced slip of rock fractures Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2025-01-07 Zhou Fang, Wei Wu
Negative pore pressure caused by unconventional energy production may offer insights into predicting and mitigating post-injection-induced seismicity. Here we presented triaxial shear experiments on sawcut, filled, and natural fractures under positive, zero, and negative pore pressures. The results show that negative pore pressure leads to an increase in the peak strength of the sawcut and filled fractures
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Meso-damage characterization of chemically corroded rocks under unloading confinement conditions Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2025-01-06 Hao Li, Leo Pel, Zhenjiang You, David Smeulders
Characterizing meso-damage and understanding its correlation with macroscopic mechanical responses of rocks under coupled chemical-mechanical (C-M) conditions are crucial for the stability analysis and safety design of underground constructions in chemically corrosive environments. This research proposes a model to quantify coupled C-M meso-damage of rocks, utilizing geochemical surface reaction theory
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Damage zone around underground opening caused by combined blast loading and initial stress unloading Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2025-01-04 Rui Zhao, Ming Tao, Murat Karakus
The formation of an Excavation Damaged Zone (EDZ) is a common issue in mining and other geotechnical engineering fields, which impacts the stability of surrounding rock mass. The excavation of deep, stressed rock mass induces stress redistribution and propagates stress waves that form an EDZ around the excavation. Modelling the complex processes of stress relief and adjustment in anisotropic stress
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Carbon negative backfill mining in coal mines for carbon neutralization: Chemical carbon fixation performances with mineralized gangue Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2025-01-04 Jixiong Zhang, Baiyi Li, Yachen Xie, Cunbao Li, Nan Zhou, Yuming Guo, Zejun Li, Heping Xie
Safe, efficient, and low-carbon coal mining is vital, especially for China, where coal remains the main energy source. Minimizing rockburst risks and ecological damage, as well as developing low, zero, and carbon negative mining, become the main task of the coal industry. However, their realization is hindered by the increasing accumulation of by-products of coal mining and utilization, such as abundant
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A micromechanical model for induced anisotropic damage-friction in rock materials under cyclic loading Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2025-01-04 Jin Zhang, Wenyong Liu, Qiaojuan Yu, Qi-Zhi Zhu, Jian-Fu Shao
This study develops a unified micromechanical induced anisotropic model to predict the instantaneous and longterm behaviors of rock materials under cyclic loading. By integrating a thermodynamic framework with the Mori–Tanaka homogenization method, the model captures the anisotropic damage evolution considering nonuniform microcrack growth. The model incorporates the interaction between microcrack-induced
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Feature extraction and classification for induced microseismic signals during hydraulic fracturing: Implication for coalbed methane reservoir stimulation Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-12-31 Quangui Li, Wenxi Li, Qianting Hu, Yunpei Liang, Yanan Qian, Zhizhong Jiang, Zhen Wang, Huiming Yang, Wanjie Sun
Before effectively analyzing the stimulation of coalbed methane (CBM) reservoirs using microseismic (MS) monitoring, it is necessary to accurately distinguish signals caused by hydraulic fracturing (HF) from interference signals. In this study, the Mel-frequency cepstral coefficient-fuzzy decision tree (MFCC-FDT) signal classification method was used. To minimize the loss of crucial details during
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Thermodynamic framework of non-local continuum damage–plasticity model Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-12-31 Yijun Chen, Mostafa E. Mobasher, Dongjian Zheng, Haim Waisman
We present a novel non-local continuum damage–plasticity model for predicting numerically the progressive failure behavior of cohesive-frictional materials within the framework of irreversible thermodynamics. The damage driving force is a function of the tensile part of elastic strain energy and a portion of the plastic stored energy, in which the introduction of coefficient χp provides the opportunity
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Numerical investigation of spatiotemporal flowing and blocking characteristics for grouting in multi karst conduits Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-12-30 Dongdong Pan, Zhiyang Wang, Xiansong Wei, Zhenhao Xu, Yichi Zhang
Grouting in flowing water for multi karst conduits is commonly used in water hazard control, yet there is no quantitative guidance. We utilized numerical simulation methods to simulate and analyze the entire process of multi-conduit flowing water grouting. First, based on the grouting simulation method proposed earlier, we constructed mathematical models for grouting in flowing water and extended it
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Experimental and numerical characterization of hydro-mechanical properties of rock fractures: The effect of the sample size on roughness and hydraulic aperture Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-12-30 Masoud Torkan, Lauri Uotinen, Alireza Baghbanan, Mikael Rinne
This paper investigated fluid flow in low-stress conditions through rock fractures in Kuru granite measuring 25 cm × 25 cm. Physical aperture and roughness were measured using high-precision photogrammetry. Anisotropy in roughness was observed in two perpendicular directions. Physical aperture under normal stresses was measured, and fracture closure was compared with linear variable displacement transducer
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Experimental study of hydraulic fracture propagation in multi-hole synchronous fracturing in horizontal wells in sandstone Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-12-27 Yulong Jiang, Weiguo Liang, Haojie Lian, Wei He
Hydraulic fracture propagation in multi-hole synchronous fracturing plays a critical role in forming complex fracture networks in unconventional reservoirs. However, the propagation mechanism of multi-hole synchronous fracturing is still unclear, especially the effects of the fracturing borehole spacing and natural fracture. In this study, a series of experiments using a triaxial loading system were
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Deterioration mechanisms of coal mechanical properties under uniaxial multi-level cyclic loading considering initial damage effects Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-12-27 Qican Ran, Yunpei Liang, Zhili Yang, Quanle Zou, Chunfeng Ye, Chenglin Tian, Zhaopeng Wu, Bichuan Zhang, Weizhi Wang
With the increase in global energy demand, coal remains a vital energy resource. However, during coal mining, coal often experiences both initial damage and cyclic loading, which leads to the deterioration of its mechanical properties. In this study, uniaxial multi-level cyclic loading experiments were performed on initial damage coal specimens (IDCSs) to examine their deformation evolution, energy
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Enhanced discontinuity characterization in hard rock pillars using point cloud completion and DBSCAN clustering Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-12-21 Chuanqi Li, Jian Zhou, Kun Du, Ming Tao
This paper proposes a novel strategy to characterize the discontinuities of hard rock pillars in underground mines. In this strategy, the point cloud completion technology is proposed to fill in the missing point clouds caused by defective digital photogrammetry. An improved density-based spatial clustering of applications with noise (DBSCAN) algorithm is developed for accurate discontinuity extraction
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A high-fidelity digital rock representation based on digital grinding combined with deep learning for four-dimensional lattice spring model Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-12-21 Gao-Feng Zhao, Yu-Hang Wu, Xin-Dong Wei
This paper introduces a method for constructing high-fidelity digital rock using digital grinding and deep learning, specifically for the Four-Dimensional Lattice Spring Model (4D-LSM). Initially, rock sequence images are captured with a self-designed digital grinding equipment. Bicubic interpolation is then applied to fill missing pixels, ensuring uniform resolution. The images are subsequently deblurred
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Failure and post-failure kinematic disaster processes of columnar rock masses based on 3D discontinuous deformation analysis Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-12-19 Ke Ma, Shengze Zhao, Guoyang Liu, Jianbin Miao, Jiashuo Kang, Linlin Wang, Qun Yu
Columnar dangerous rock masses are considered important hazardous rock formations because of their ubiquity, abrupt failure, and high collapse frequency. The kinematic processes following their failure directly trigger geological disasters. This study investigates the failure and post-failure kinematic disaster processes of columnar rock masses using three-dimensional discontinuous deformation analysis
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Charge signals characterizing the influence of bedding angles on shale damage under cyclic loading and unloading Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-12-14 Long Ren, Baolong Zhu, Jing Li, Liming Qiu
The role of bedding angle on the mechanic properties and failure modes of shale under cyclic loading and unloading conditions is unclear. This study conducted uniaxial cyclic loading and unloading tests on shales from the Longmaxi Formation with different bedding angles (θ = 0°, 22.5°, 45°, 67.5° and 90°), and characterized their damage evolution through both AE and charge signals. Results show that
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A shear strength criterion of rock joints under dynamic normal load Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-12-13 Qiang Zhang, Qiuxin Gu, Shuchen Li, Hongying Wang, Guilei Han
The shear strength of rock joints under dynamic normal load (DNL) conditions is quite different from that under constant normal loading (CNL) conditions. However, existing studies seldom involve the shear strength prediction of rock joints under DNL conditions. Therefore, a series of shear tests for rock joints under DNL conditions were carried out. The evolutions of the shear strength parameters,
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Fully coupled hydro-mechanical–chemical continuum modeling of fluid percolation through rock salt Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-12-12 Ishmael Dominic Yevugah, Xiang-Zhao Kong, Antoine B. Jacquey, Christopher P. Green, Hartmut M. Holländer, Pooneh Maghoul
In domal and bedded rock salt geothermal reservoirs, geochemical dissolution of the in-situ rock salt formation can alter fluid transport properties, thus impacting fluid flow. Coupled Hydro-mechanical–chemical (HMC) modeling is a useful tool to evaluate fluid transport through rock salt geothermal systems and to assess their economic potential. Existing continuum-based numerical simulation of fluid
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A micro-macro fracture model for evaluating the brittle-ductile transition and rockburst of rock in true triaxial compression Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-12-10 Xiaozhao Li, Lianjie Li, Yujie Yan, Chengzhi Qi
In deep underground engineering, true triaxial compressive stress and internal microcrack characteristics significantly influence the brittle-ductile transition and anisotropic mechanical behavior of rock, thereby affecting the engineering life cycle. However, current research on the micro-macro mechanical model under true triaxial compressive stress, particularly regarding the rock's brittle-ductile
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Evaluation of Forchheimer equation coefficients for nonlinear flow through rough-walled fractures during shearing Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-12-10 Xu Zhu, Guangyao Si, Chengguo Zhang, Yingchun Li, Joung Oh
The presence of complex geometric morphology of single rough-walled rock fractures and the occurrence of nonlinear flow complicate the fracture flow process. Even though the nonlinear flow behaviour in single rock fractures has been studied for decades, existing models are still limited in adequately evaluating nonlinear flow behaviour during shearing. In this study, a series of coupled shear-flow
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Onset of pore collapse and dilatancy in porous sandstone under true triaxial compression: Experimental observation and micromechanical modeling Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-12-10 Fanbao Meng, Lu Shi, Stephen Hall, Patrick Baud, Teng-fong Wong
We present new true triaxial compression data obtained in the ductile regime on Bleurswiller sandstone. The deformed samples show a range of failure modes qualitatively similar to what was reported by earlier experimental studies performed in conventional conditions (axisymmetric compression). In particular, visual inspection and X-ray Computed Tomography imaging reveal compaction localization in all
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Modelling microwave fracturing of rocks: A continuum-discontinuum numerical approach Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-12-10 Yinjiang Nie, Yanlong Zheng, Jianchun Li
Existing numerical models cannot well reproduce the fracturing process and reveal the underlying mechanisms of rocks under microwave irradiation. In this work, the electromagnetic-thermal-mechanical multiphysics is decoupled into microwave-induced heating (continuum-based) and thermally-driven fracturing (discontinuum-based), with temperature serving as the key interlink. The rigid-body spring-subset
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Comprehensive in-situ stress estimation in a fractured geothermal reservoir in Pohang, South Korea using drilling data, hydraulic stimulations, and induced seismicity Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-12-08 Sehyeok Park, Kwang-Il Kim, Hwajung Yoo, Juhyi Yim, Ki-Bok Min
A comprehensive in situ stress estimation is carried out in the fractured reservoir at the enhanced geothermal system development site in Pohang, South Korea. Various types of stress indicators were collected from the hydraulic stimulation data, drilling records, lost circulation records, well logs, seismic events, and the stress constraints from previously proposed stress models. The comprehensive
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Strength changes associated with water transport in unsaturated tuff during drying Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-12-07 Yota Togashi, Haruhiko Kotabe, Masahiko Osada, Shingo Asamoto, Ken Hatakeyama
The impact of water content on the strength of sedimentary rocks is a critical area of research, particularly in the contexts of disaster prevention and the construction of underground structures. Despite numerous factors being identified as contributors to the strength variations in sedimentary rocks caused by water content, a comprehensive understanding remains elusive. Moreover, only a limited number
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Anisotropic acoustoelastic effective-medium model for stress-dependent elastic moduli of fractured rocks Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-12-06 Bo-Ye Fu, Li-Yun Fu
Prestress significantly influences the mechanical properties of fractured rocks due to stress-induced anisotropy in the surrounding matrix and the stress-induced closure of cracks. Understanding the stress-dependent elastic moduli and anisotropic properties is crucial for various geoscience applications. The theory of acoustoelasticity only accounts for weak nonlinear elasticity with finite strains
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A realistic 3D grain-based modeling approach for reproducing the mechanical and failure behavior of brittle granites Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-11-30 Yu Zhou, Wenjun Lv, Bo Li, Qinyuan Liang, Shaoqi Wang
Exploring cracking behavior from mineral-scale do good help to understand the failure mechanism of rock materials. The present study proposes a realistic three-dimensional grain-based modeling (3D-GBM) method considering the actual distribution, geometry and mesoscopic mechanical properties of different minerals in granite samples. The geometrical characteristic and distribution were captured based
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Influences of the stress ratio and local micro mineral aggregates on small fatigue crack propagation in the shale containing bedding planes Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-11-29 Yuanxun Nie, Xishu Wang, Bisheng Wu, Guangqing Zhang, Ranjith Pathegama Gamage, Shiyuan Li, Li Zhang
Due to the existence of bedding planes in shale oil reservoirs, the complexity of crack networks created by conventional hydraulic fracturing (HF) technology is limited, resulting in low oil production. In this paper, a fatigue loading method was proposed to increase the complexity of the cracking network. The propagation behaviors of small cracks were investigated and compared under both monotonic
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Mechanical characterization of intact rock under polyaxial static-dynamic stress states Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-11-29 Babak Khadivi, Hossein Masoumi, Amin Heidarpour, Qianbing Zhang, Jian Zhao
Accurate assessment of mechanical behaviour of rock is essential for safe and efficient design of structures on or within rock mass particularly under harsh in-situ stress conditions. Insights from rock engineering practices have revealed that rockbursts can occur at various scales and at any time during mining activities. These violent failure phenomena can be triggered by quasi-static stress redistribution
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Fatigue fracture behaviors and damage evolution of coal samples treated with drying–wetting cycles investigated by acoustic emission and nuclear magnetic resonance Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-11-29 Hongxin Xie, Heping Xie, Zetian Zhang, Qiangling Yao, Zhiguo Cao, Heng Gao, Changhao Shan, Zhiwei Yan, Rongjie Yin
Constructing pumped-storage power stations using underground reservoirs in mines offers a promising method for large-scale energy storage. Watertight coal pillars have the potential to destabilize under the mine-shock cyclic dynamic loading and the drying–wetting cycles (DWCs). Understanding the fatigue damage mechanism and failure precursors in watertight coal pillars under cyclic dynamic loading
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Acoustic emission evolution and fracture mechanism of rock for direct tensile failure Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-11-29 Jianfeng Liu, Yang Wu, Junjie Liu, Yongyi He, Xuesong Shen, Yingjie Du, Bole Sun
The failure mechanisms of engineering rock masses primarily involve tensile and shear failure. Differentiating between the acoustic emission (AE) signals generated during the tensile and shear damage processes in rock can provide a scientific basis for the classification of acoustic signals in field rock fracture monitoring. This paper presents a study on acoustic emission monitoring during the direct
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Semi-Automated rock block volume extraction from high-resolution 3D point clouds for enhanced rockfall hazard analysis Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-11-26 Giampiero Mineo, Marco Rosone, Chiara Cappadonia
Rockfalls are critical landslide phenomena affecting human activities, with risk assessment based on hazard evaluation and potential impacts on exposed elements. Traditional methods for estimating unstable rock block volumes require direct measures often in hard-to-reach areas, hazardous, with time consuming approaches. This study introduces a semi-automatic method for estimating the most probable
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Evaluation of ring test with reference to deformation rate and specimen geometry in assessing the tensile behaviors of granite Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-11-26 Manali Sarkar, Arindam Basu
Ring test for indirect tensile strength measurements utilizes disc specimens with a hole at the center of the disc. Such specimens are found to limit the stresses at the specimen-platen contact and transfer the tensile stress to the upper- and lower-hole boundaries in ring specimens. Researchers observed that the tensile strength of a ring specimen tends to decrease as the ratio of the hole-radius
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Micromechanical model for simulating load transfer behavior and damage evolution for fully grouted rockbolt under axial loads Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-11-26 Kai Guan, Xu Jiang, Wancheng Zhu, Wenjun Luo, Hongping Li, Bowang Li
In the present paper the problems of the nonlinear debonding of anchorage interface, the strain-hardening and rupture of rockbolt, and the progressive damage of heterogeneous rock for the fully grouted rockbolt under axial loads are studied. A micromechanical numerical model is developed and implemented into the finite difference programme, to analyze the load transfer mechanism and damage evolution
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Experimental analysis of rock mass transport during dolomite and gas outburst Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-11-26 Katarzyna Kozieł, Norbert Skoczylas
In this paper, the problem of transporting rock material deep into the working is addressed. In the case of coal, literature reports indicate that sorbed gas is responsible for coal mass transport. As a result of laboratory tests, the marginality of sorption phenomena occurring in dolomite was confirmed. Transport of rock material during rock and gas outburst takes place in several stages. In the first
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Experimental study and model improvement on coal permeability: The influence of effective stress, slip effect, and water content Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-11-25 Zhiyong Xiao, Gang Wang, Jie Liu, Huafeng Deng, Yujing Jiang, Feng Jiang, Chengcheng Zheng
Permeability is a critical parameter in coalbed methane (CBM) recovery and received increasing attention in recent years. The slip effect and effective stress exert competing influences on permeability, with coal exhibiting varying sensitivities to effective stress depending on their pore structures. The presence of water further complicates these interactions, affecting both the slip effect and permeability
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Effect of hydro-chemical corrosion on mechanical properties of red sandstone under uniaxial and triaxial compression Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-11-24 Chao Chen, Wei Wang, Yajun Cao, Chaowei Chen, Shifan Liu, Wanqing Shen, Qizhi Zhu
The degradation of mechanical characteristics of sandstone, a common engineering material in acid environment, is directly related to the project service life forecast. In order to investigate the influence of water–rock interaction on the mechanical properties of red sandstone, a series of uniaxial and triaxial compression tests were conducted on sandstone immersed in solutions of different pH values
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Improvement of granite and concrete cutting efficiency using mixed-abrasives Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-11-22 Hyun-Joong Hwang, Yohan Cha, Tae-Min Oh, Gye-Chun Cho
Garnet and steel shot have advantages and disadvantages in terms of cutting performance and economic efficiency as single abrasive materials for cutting rock and concrete using abrasive waterjet. However, the application of abrasive waterjet technology in construction sites is still limited due to the cutting performance and cost limitations of single abrasive. A new strategy is needed for effective
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Fracture behavior of thermally treated granite under compression-shear loading Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-11-20 Chenxi Zhang, Diyuan Li, Xiaoli Su, Pingkuang Luo, Jinyin Ma, Quanqi Zhu
Understanding the fracture behavior of rock after thermal treatment is important in the deep rock engineering, such as nuclear waste disposal and geothermal energy exploration. In this work, to investigate fracture properties of thermally treated rock under compression-shear loading, a series of variable angle shear (VAS) tests were performed on shear-box (SB) granite specimens exposed to temperatures
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Numerical investigation of dynamic disturbance process induced by a mining tremor based on time-dependent moment tensor Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-11-20 Fan Chen, Zhengzhao Liang, Li Li, Anye Cao, Wencheng Song, Zhenghu Zhang
Coal bursts, arising from abrupt dynamic disturbances from mining tremors, are among the most critical dynamic disasters in underground coal mines. Understanding the dynamic disturbance process of mining tremors is crucial for unravelling the mechanism behind coal bursts and identifying high-risk zones. However, previous studies have often utilized oversimplified source representations to model the
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Mutual feedback and fracturing effect of hydraulic fractures in composite coal−rock reservoirs under different fracturing layer sequence conditions Int. J. Rock Mech. Min. Sci. (IF 7.0) Pub Date : 2024-11-16 Bo Li, Yizheng He, Zhen Shi, Wang Jian, Nannan Wang, Yapeng Zhang
Multistage fractures in different reservoirs exhibit competitive extension and mutual feeding mechanisms under different fracturing sequence conditions. To better understand these mechanisms for a more efficient extraction of mine gases, a combination of true triaxial physical tests and numerical simulation was performed in this study. The expansion process of hydraulic fractures in different layers