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Ash removal from inferior coal via ammonium fluoride roasting and simultaneous yield of white carbon black Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2024-02-28 Xuqin Duan, Shuaiyu Lu, Yuxiao Fu, Jiazhe Zhang, Tong Liu, Jian Ma
The quality upgrading and deashing of inferior coal by chemical method still faces great challenges. The dangers of strong acid, strong alkali, waste water and exhaust gas as well as high cost limit its industrial production. This paper systematically investigates the ash reduction and desilicification of two typical inferior coal utilizing ammonium fluoride roasting method. Under the optimal conditions
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Transfer learning framework for multi-scale crack type classification with sparse microseismic networks Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2024-02-27 Arnold Yuxuan Xie, Bing Q. Li
Rock fracture mechanisms can be inferred from moment tensors (MT) inverted from microseismic events. However, MT can only be inverted for events whose waveforms are acquired across a network of sensors. This is limiting for underground mines where the microseismic stations often lack azimuthal coverage. Thus, there is a need for a method to invert fracture mechanisms using waveforms acquired by a sparse
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Experimental study of the damage characteristics of rocks containing non-penetrating cracks under cyclic loading Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2024-02-26 Jun Xu, Xiaochun Xiao, Lu Ma, Sen Luo, Jiaxu Jin, Baijian Wu
The damage evolution process of non-penetrating cracks often causes some unexpected engineering disasters. Gypsum specimens containing non-penetrating crack(s) are used to study the damage evolution and characteristics under cyclic loading. The results show that under cyclic loading, the relationship between the number of non-penetrating crack(s) and the characteristic parameters (cyclic number, peak
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Estimation of the anisotropy of hydraulic conductivity through 3D fracture networks using the directional geological entropy Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2024-02-23 Chuangbing Zhou, Zuyang Ye, Chi Yao, Xincheng Fan, Feng Xiong
With an extension of the geological entropy concept in porous media, the approach called directional entrogram is applied to link hydraulic behavior to the anisotropy of the 3D fracture networks. A metric called directional entropic scale is used to measure the anisotropy of spatial order in different directions. Compared with the traditional connectivity indexes based on the statistics of fracture
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Three-dimensional stress variation characteristics in deep hard rock of CJPL-II project based on in-situ monitoring Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2024-02-23 Minzong Zheng, Shaojun Li, Zejie Feng, Huaisheng Xu, Yaxun Xiao
In deep hard rock excavation, stress plays a pivotal role in inducing stress-controlled failure. While the impact of excavation-induced stress disturbance on rock failure and tunnel stability has undergone comprehensive examination through laboratory tests and numerical simulations, its validation through in-situ stress tests remains unexplored. This study analyzes the three-dimensional stress changes
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Predicting impact forces on pipelines from deep-sea fluidized slides: A comprehensive review of key factors Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2024-02-20 Xingsen Guo, Ning Fan, Defeng Zheng, Cuiwei Fu, Hao Wu, Yanjun Zhang, Xiaolong Song, Tingkai Nian
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Fatigue properties and damage constitutive model of salt rock based on CT scanning Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2024-02-12 Junbao Wang, Xiao Liu, Qiang Zhang, Xinrong Liu, Zhanping Song, Shijin Feng
To investigate the macroscopic fatigue properties and the mesoscopic pore evolution characteristics of salt rock under cyclic loading, fatigue tests under different upper-limit stresses were carried out on salt rock, and the mesoscopic pore structures of salt rock before and after fatigue tests and under different cycle numbers were measured using CT scanning instrument. Based on the test results,
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Pressure stimulated current in progressive failure process of combined coal-rock under uniaxial compression: Response and mechanism Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2024-02-07 Tiancheng Shan, Zhonghui Li, Xin Zhang, Haishan Jia, Xiaoran Wang, Enyuan Wang, Yue Niu, Dong Chen, Weichen Sun, Dongming Wang
Effective monitoring of the structural health of combined coal-rock under complex geological conditions by pressure stimulated currents (PSCs) has great potential for the understanding of dynamic disasters in underground engineering. To reveal the effect of this way, the uniaxial compression experiments with PSC monitoring were conducted on three types of coal-rock combination samples with different
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Microdynamic mechanical properties and fracture evolution mechanism of monzogabbro with a true triaxial multilevel disturbance method Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2024-02-03 Zhi Zheng, Bin Deng, Hong Liu, Wei Wang, Shuling Huang, Shaojun Li
The far-field microdynamic disturbance caused by the excavation of deep mineral resources and underground engineering can induce surrounding rock damage in high-stress conditions and even lead to disasters. However, the mechanical properties and damage/fracture evolution mechanisms of deep rock induced by microdynamic disturbance under three-dimensional stress states are unclear. Therefore, a true
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Experimental and numerical study on dynamic mechanical behaviors of shale under true triaxial compression at high strain rate Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2024-01-26 Xiaoping Zhou, Linyuan Han, Jing Bi, Yundong Shou
High-energy gas fracturing of shale is a novel, high efficacy and eco-friendly mining technique, which is a typical dynamic perturbing behavior. To effectively extract shale gas, it is important to understand the dynamic mechanical properties of shale. Dynamic experiments on shale subjected to true triaxial compression at different strain rates are first conducted in this research. The dynamic stress-strain
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Classifying rockburst with confidence: A novel conformal prediction approach Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2024-01-18 Bemah Ibrahim, Isaac Ahenkorah
The scientific community recognizes the seriousness of rockbursts and the need for effective mitigation measures. The literature reports various successful applications of machine learning (ML) models for rockburst assessment; however, a significant question remains unanswered: How reliable are these models, and at what confidence level are classifications made? Typically, ML models output single rockburst
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Creep constitutive model considering nonlinear creep degradation of fractured rock Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2024-01-18 Wang Chunping, Liu Jianfeng, Chen Liang, Liu Jian, Wang Lu, Liao Yilin
Stability analysis of underground constructions requires a model study of rock masses’ long-term performance. Creep tests under different stress conditions was conducted on intact granite and granite samples fractured at 30° and 45° angles. The experimental results indicate that the steady creep strain rates of intact and fractured rock present an exponential increase trend with the increase of stress
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Numerical and experimental investigation on hydraulic-electric rock fragmentation of heterogeneous granite Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2024-01-18 Xiaohua Zhu, Ling He, Weiji Liu, Yunxu Luo, Youjian Zhang, Wuji Tang
Hydraulic-electric rock fragmentation (HERF) plays a significant role in improving the efficiency of high voltage pulse rock breaking. However, the underlying mechanism of HERF remains unclear. In this study, considering the heterogeneity of the rock, microscopic thermodynamic properties, and shockwave time domain waveforms, based on the shockwave model, digital imaging technology and the discrete
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Experimental investigation of the inhibition of deep-sea mining sediment plumes by polyaluminum chloride Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2024-01-12 Fengpeng Zhang, Xuguang Chen, Jiakang Wei, Yangyang Zhang, Weikun Xu, Hao Li
Deep-sea sediment disturbance may occur when collecting polymetallic nodules, resulting in the creation of plumes that could have a negative impact on the ecological environment. This study aims to investigate the potential solution of using polyaluminum chloride (PAC) in the water jet. The effects of PAC are examined through a self-designed simulation system for deep-sea polymetallic nodule collection
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Intermittent disturbance mechanical behavior and fractional deterioration mechanical model of rock under complex true triaxial stress paths Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2024-01-11 Zhi Zheng, Hongyu Xu, Kai Zhang, Guangliang Feng, Qiang Zhang, Yufei Zhao
Mechanical excavation, blasting, adjacent rockburst and fracture slip that occur during mining excavation impose dynamic loads on the rock mass, leading to further fracture of damaged surrounding rock in three-dimensional high-stress and even causing disasters. Therefore, a novel complex true triaxial static-dynamic combined loading method reflecting underground excavation damage and then frequent
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Preliminary research and scheme design of deep underground in situ geo-information detection experiment for Geology in Time Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2024-01-11 Heping Xie, Ru Zhang, Zetian Zhang, Yinshuang Ai, Jianhui Deng, Yun Chen, Yong Zhou, Mingchuan Li, Liqiang Liu, Mingzhong Gao, Zeqian Yang, Weiqiang Ling, Heng Gao, Qijun Hao, Kun Xiao, Chendi Lou
The deep earth, deep sea, and deep space are the main parts of the national “three deep” strategy, which is in the forefront of the strategic deployment clearly defined in China’s 14th Five-Year Plan (2021–2025) and the Long-Range Objectives Through the Year 2035. It is important to reveal the evolutionary process and mechanism of deep tectonics to understand the earth’s past, present and future. The
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Heat transfer and temperature evolution in underground mining-induced overburden fracture and ground fissures: Optimal time window of UAV infrared monitoring Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2024-01-08 Yixin Zhao, Kangning Zhang, Bo Sun, Chunwei Ling, Jihong Guo
Heat transfer and temperature evolution in overburden fracture and ground fissures are one of the essential topics for the identification of ground fissures via unmanned aerial vehicle (UAV) infrared imager. In this study, discrete element software UDEC was employed to investigate the overburden fracture field under different mining conditions. Multiphysics software COMSOL were employed to investigate
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Pore-pressure and stress-coupled creep behavior in deep coal: Insights from real-time NMR analysis Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2024-01-05 Wenhao Jia, Hongwei Zhou, Senlin Xie, Yimeng Wang, Xinfeng Hu, Lei Zhang
Understanding the variations in microscopic pore-fracture structures (MPFS) during coal creep under pore pressure and stress coupling is crucial for coal mining and effective gas treatment. In this manuscript, a triaxial creep test on deep coal at various pore pressures using a test system that combines in-situ mechanical loading with real-time nuclear magnetic resonance (NMR) detection was conducted
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Morphological evolution and flow conduction characteristics of fracture channels in fractured sandstone under cyclic loading and unloading Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-12-14 Quanle Zou, Zihan Chen, Jinfei Zhan, Chunmei Chen, Shikang Gao, Fanjie Kong, Xiaofeng Xia
In coal mining, rock strata are fractured under cyclic loading and unloading to form fracture channels. Fracture channels are the main flow narrows for gas. Therefore, expounding the flow conductivity of fracture channels in rocks on fluids is significant for gas flow in rock strata. In this regard, graded incremental cyclic loading and unloading experiments were conducted on sandstones with different
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Mechanical response and microscopic damage mechanism of pre-flawed sandstone subjected to monotonic and multilevel cyclic loading: A laboratory-scale investigation Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-12-13 Kesheng Li, Shengqi Yang, Chuanxiao Liu, Yun Chen, Guanglei Zhang, Qing Ma
This study aims to investigate the mechanical response and acoustic emission (AE) characteristic of pre-flawed sandstone under both monotonic and multilevel constant-amplitude cyclic loads. Specifically, we explored how coplanar flaw angle and load type impact the strength and deformation behavior and microscopic damage mechanism. Results indicated that being fluctuated before rising with increasing
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3D forward modeling and response characteristics of low-resistivity overburden of the CFS-PML absorbing boundary for ground-well transient electromagnetic method Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-12-13 Lijuan Zhao, Mingzhong Gao, Nengzhong Lei, Hongfei Duan, Weizhong Qiu, Zhaoying Chen
This study used the stable and convergent Dufort-Frankel method to differentially discretize the diffusion equation of the ground-well transient electromagnetic secondary field. The absorption boundary condition of complex frequency-shifted perfectly matched layer (CFS-PML) was used for truncation so that the low-frequency electromagnetic wave can be better absorbed at the model boundary. A typical
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Mechanism of gas pressure action during the initial failure of coal containing gas and its application for an outburst inoculation Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-12-13 Chaojie Wang, Lutan Liu, Xiaowei Li, Changhang Xu, Kai Li
Faced with the continuous occurrence of coal and gas outburst (hereinafter referred to as “outburst”) disasters, as a main controlling factor in the evolution process of an outburst, for gas pressure, it is still unclear about the phased characteristics of the coupling process with in situ stress, which induce coal damage and instability. Therefore, in the work based on the mining stress paths induced
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Extraction and imaging of indicator elements for non-destructive, in-situ, fast identification of adverse geology in tunnels Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-12-13 Fumin Liu, Peng Lin, Zhenhao Xu, Ruiqi Shao, Tao Han
The lag in quantitative methods and detection techniques for geologic information has resulted in time-consuming and human-experienced geologic analysis in tunnels. Geochemical indicators of rocks can be used to identify adverse geology and to explain the intrinsic causes of damage to normal rocks. This study proposes a method to identify adverse geology by extracting and imaging the indicator elements
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Study on damage-stress loss coupling model of rock and prestressed anchor cable in dry-wet environment Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-12-12 Yu Zhao, Huasu Wang, Jing Bi, Zhijun Wu, Chaolin Wang, Jiabao Ma
The loss of anchoring force is one of the problems to be solved urgently. The anchorage loss is a key factor causing the failure of anchoring engineering, so it is crucial to study the time-dependent variation of anchoring force. Alternating dry and wet (D-W) conditions have a significant effect on deformation of rock. The anchoring system is composed of anchoring components and rock mass, and thus
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Effect of content and spin state of iron on electronic properties and floatability of iron-bearing sphalerite: A DFT+U study Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-12-12 Yao Feng, Zhuofan Li, Jianhua Chen, Ye Chen
Iron is an impurity widely occurred in sphalerite, and its effect on sphalerite flotation is complex. In this work, the effects of iron content and spin state on electronic properties and floatability of iron-bearing sphalerite are comprehensively studied using density functional theory Hubbard U (DFT+U) calculations combined with coordination chemistry flotation. The band gap of ideal sphalerite is
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Geopolymer-based modification of blasting sealing materials and optimization of blasting block size in coal seams of open pit mines Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-12-12 Xiaohua Ding, Zhongchen Ao, Wei Zhou, Hao Qin, Zhongao Yang, Wen An, Xiaoshuang Li, Honglin Liu
This research proposes the utilization of a geopolymer-based blasting sealing material to improve the profitability of coal sales and reduce the rate of coal fragmentation during blasting in open pit mines. The study first focused on optimizing the strength of the sealant material and reducing curing time. This was achieved by regulating the slag doping and sodium silicate solution modulus. The findings
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Development of an improved three-dimensional rough discrete fracture network model: Method and application Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-12-05 Peitao Wang, Chi Ma, Bo Zhang, Qi Gou, Wenhui Tan, Meifeng Cai
Structure plane is one of the important factors affecting the stability and failure mode of rock mass engineering. Rock mass structure characterization is the basic work of rock mechanics research and the important content of numerical simulation. A new 3-dimensional rough discrete fracture network (RDFN3D) model and its modeling method based on the Weierstrass-Mandelbrot (W-M) function were presented
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Design and development of the deep-rock in-situ condition-preserved coring calibration platform Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-11-18 Yihang Li, Heping Xie, Ru Zhang, Zetian Zhang, Zhilong Zhang, Heng Gao, Wei Huang, Jixun Zhang, Jiming Gao, Xin Ma, Ruibing Xu
To systematically validate and calibrate the theory and technology of the deep in-situ condition-preserved coring, the in-situ conditions at different depths should be simulated, and the full-size coring tests should be carried out in this simulated environment. Therefore, a deep-rock in-situ condition-preserved coring calibration platform was designed and developed. The self-tightening sealing structure
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Direct measurement and theoretical prediction model of interparticle adhesion force between irregular planetary regolith particles Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-11-17 Heping Xie, Qi Wu, Yifei Liu, Yachen Xie, Mingzhong Gao, Cunbao Li
Interparticle adhesion force has a controlling effect on the physical and mechanical properties of planetary regolith and rocks. The current research on the adhesion force of planetary regolith and rock particles has been primarily based on the assumption of smooth spherical particles to calculate the intergranular adhesion force; this approach lacks consideration for the adhesion force between irregular
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Development of a pressure coring system for the investigation of deep underground exploration Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-11-17 Da Guo, Ling Chen, Zhongya Zhou, Dingming Wang, Yiwei Zhang, Xun Yang, Xin Fang, Xiaojun Wang, Heping Lu, Lin Dai, Heping Xie
To provide a more accurate evaluation of the scale of deep underground resources, a new pressure coring system was carefully developed and its strength and safety of the engineering were verified by theoretical analyses and numerical simulation. The designed pressure coring system can obtain cores with length of 3 m and diameter of 50 mm at 70 MPa. The results of the ball-drop operation experiment
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Research progress and application of deep in-situ condition preserved coring and testing Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-11-02 Heping Xie, Yunqi Hu, Mingzhong Gao, Ling Chen, Ru Zhang, Tao Liu, Feng Gao, Hongwei Zhou, Xiaobo Peng, Xiongjun Li, Jianbo Zhu, Cunbao Li, Ruidong Peng, Yanan Gao, Cong Li, Jianan Li, Zhiqiang He
With the depletion of shallow resources, the exploration of deep earth resources has become a global strategy. The study of the different patterns in the physical mechanical properties of rocks at different occurrence depths is the basis for exploring deep into the earth, with the core and premise being the acquisition and testing of deep in-situ core specimens. Based on the original idea of deep in-situ
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A graphene-enhanced high-barrier and fast-curing film for deep in situ condition preserved coring in coal seams Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-10-24 Dongsheng Yang, Zhiyu Zhao, Yifan Wu, Liangyu Zhu, Jingli Lu, Tao Liu, Heping Xie
Scientific research on deep in situ resources is highly important to the theory and technology system construction for deep in-situ resource exploitation. To obtain high-condition preserved core samples, it is vital to maintain the original material, humidity and luminous flux information inside the core. Therefore, this study proposes a research and development strategy for a high-toughness and high-barrier
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Flotation and adsorption of novel Gemini decyl-bishydroxamic acid on bastnaesite: Experiments and density functional theory calculations Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-10-21 Longhua Xu, Chang Liu, Jiushuai Deng, Donghui Wang, Kai Xue, Yan Wang, Jinping Meng, Jiongtian Liu
Rare earth element is an important strategic metal, but the supply of high purity rare earth ores is growing slowly, which is in sharp contradiction with the rapidly growing demand. Froth flotation has been confirmed to be an effective method to separate bastnaesite from its gangue minerls. However, the traditional collectors are facing serious problems in flotation separation of minerals, requiring
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Polysaccharides-based pyrite depressants for green flotation separation: An overview Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-10-20 A. Asimi Neisiani, R. Saneie, A. Mohammadzadeh, D.G. Wonyen, S. Chehreh Chelgani
Froth flotation is an essential processing technique for upgrading low-grade ores. Flotation separation would not be efficient without chemical surfactants (collectors, depressants, frothers, etc.). Depressants play a critical role in the selective separation of minerals in that they deactivate unfavorable mineral surfaces and hinder them from floating into the flotation concentration zone. Pyrite
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Shear behaviours and roughness degeneration based on a quantified rock joint surface description Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-10-19 Shubo Zhang, Gang Wang, Yujing Jiang, Changsheng Wang, Feng Xu
The asperity wear of rock joints significantly affects their shear behaviour. This study discusses the wear damage of the asperities on the joint surface, highlighting the roughness degradation characteristics during the shear process. The direct shear experiment of artificial specimens containing rock joints was conducted under different normal stresses based on three-dimensional scanning technology
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Microseismic event waveform classification using CNN-based transfer learning models Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-10-17 Longjun Dong, Hongmei Shu, Zheng Tang, Xianhang Yan
The efficient processing of large amounts of data collected by the microseismic monitoring system (MMS), especially the rapid identification of microseismic events in explosions and noise, is essential for mine disaster prevention. Currently, this work is primarily performed by skilled technicians, which results in severe workloads and inefficiency. In this paper, CNN-based transfer learning combined
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Numerical modeling on strain energy evolution in rock system interaction with energy-absorbing prop and rock bolt Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-10-16 Yang Hao, Chunhui Liu, Yu Wu, Hai Pu, Yanlong Chen, Lingling Shen, Guichen Li
The interaction mechanism between coal and rock masses with supporting materials is significant in roadway control, especially in deep underground mining situations where dynamic hazards frequently happened due to high geo-stress and strong disturbed effects. This paper is to investigate the strain energy evolution in the interaction between coal and rock masses with self-designed energy-absorbing
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Effect of particle gradation on pore structure and seepage law of solution in weathered crust elution-deposited rare earth ores Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-10-13 Defeng Liu, Wenxin Yan, Zhenyue Zhang, Ruan Chi
Both CT and Avizo software were used to explore the effect of particle gradation on the evolution characteristics of pore structure and seepage paths in weathered crust elution-deposited rare earth ores during leaching. The results showed that the pore areas in four kinds of ore samples before leaching were mainly concentrated in 104–107 μm2, whose pore quantities accounted for 96.89%, 94.94%, 90.48%
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Corrigendum to “Mechanical behavior of sandstone during post-peak cyclic loading and unloading under hydromechanical coupling” [Int J Min Sci Technol 33(8) (2023) 927–947] Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-10-11 Yanlin Zhao, Jinhai Liu, Chunshun Zhang, Jian Liao, Sitao Zhu, Lianyang Zhang
Abstract not available
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Mechanical properties and damage characteristics of solidified body-coal combination in continuous driving and gangue backfilling Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-10-10 Yi Tan, Hao Cheng, Wenbing Guo, Erhu Bai, Shaopu Zhang, Yu Wang, Zihao Li
Recovery of the coal buried under buildings, railways and water bodies and the residual coal in irregularly arranged fully mechanized mining faces is a common engineering problem facing underground coal mining. In this study, a mining technology of continuous driving and gangue backfilling (CDGB) was proposed. The technology, which can not only alleviate ground subsidence and gangue discharge, but
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Selective flotation of chalcopyrite from pyrite via seawater oxidation pretreatment Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-09-28 Wanqing Li, Yubiao Li, Zhonghong Wang, Xu Yang, Wen Chen
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Selection and thermal physical characteristics analysis of in-situ condition preserved coring lunar rock simulant in extreme environment Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-09-23 Haichun Hao, Mingzhong Gao, Cunbao Li, Xuan Wang, Yan Wu, Zheng Gao, Wen Yu, Xuemin Zhou
With the increasing scarcity of Earth’s resources and the development of space science and technology, the exploration, development, and utilization of deep space-specific material resources (minerals, water ice, volatile compounds, etc.) are not only important to supplement the resources and reserves on Earth but also provide a material foundation for establishing extraterrestrial research bases.
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Experimental study on instability mechanism and critical intensity of rainfall of high-steep rock slopes under unsaturated conditions Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-09-19 Xiaoshuang Li, Qihang Li, Yunmin Wang, Wei Liu, Di Hou, Wenbo Zheng, Xiong Zhang
Two critical factors, namely intense precipitation and intricate excavation, can trigger rock mass disasters in mining operations. In this study, an indoor rainfall system was developed to precisely regulate the flow and intensity of precipitation. A large-scale model experiment was conducted on a self-designed physical simulation experiment platform to investigate the failure and instability of high-steep
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A deformation measurement method based on surface texture information of rocks and its application Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-09-10 Yanbo Zhang, Xin Han, Peng Liang, Xulong Yao, Qun Li, Guangyuan Yu, Qi Wang
Users of the digital image correlation method are faced with the problem of poor operability, low repeatability, and lack of standardized specifications for spraying speckles. To solve the problem, the research proposed a rock deformation measurement method that obviates the need to spray speckles. A local binary model was established by using the local binary pattern (LBP) operator based on deep texture
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An image segmentation method of pulverized coal for particle size analysis Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-09-09 Xin Li, Shiyin Li, Liang Dong, Shuxian Su, Xiaojuan Hu, Zhaolin Lu
An important index to evaluate the process efficiency of coal preparation is the mineral liberation degree of pulverized coal, which is greatly influenced by the particle size and shape distribution acquired by image segmentation. However, the agglomeration effect of fine powders and the edge effect of granular images caused by scanning electron microscopy greatly affect the precision of particle image
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Deep-sea rock mechanics and mining technology: State of the art and perspectives Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-09-09 Zenghui Liu, Kai Liu, Xuguang Chen, Zhengkuo Ma, Rui Lv, Changyun Wei, Ke Ma
The review covers the development and the state of the art in deep-sea mining rock mechanics, equipment and challenges. It begins by introducing the significance of deep-sea mining, the types and geographical distribution of deep-sea resources. Section 2 reviews the mechanical properties and fracture mechanism of seabed and related continental rocks, which contributes to the advancement of relevant
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Rock dynamics in deep mining Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-09-01 Manchao He, Qi Wang
Rock mass dynamics disasters caused by excavations and mining occur frequently in deep mines. In order to establish a theoretical system and control technologies for such disasters, we first classify and define dynamic disasters, such as rock bursts, coal bursts, mine pressure bumps, and mine earthquakes. According to the occurrence mechanism of different types of dynamic disasters, we establish a
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Integrated simulation and monitoring to analyze failure mechanism of the anti-dip layered slope with soft and hard rock interbedding Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-09-01 Jinduo Li, Yuan Gao, Tianhong Yang, Penghai Zhang, Yong Zhao, Wenxue Deng, Honglei Liu, Feiyue Liu
The significant difference between the mechanical properties of soft rock and hard rock results in the complexity of the failure mode of the anti-dip layered slope with soft and hard rock interbedding. In order to reveal the landslide mechanism, taking the north slope of Fushun West Open-pit Mine as an example, this paper analyzed the failure mechanism of different landslides with monitoring and field
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Numerical analysis on mechanical difference of sandstone under in-situ stress, pore pressure preserved environment at depth Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-09-01 Hongwei Zhou, Mingyuan Lu, Heping Xie, Wenhao Jia, Ruidong Peng, Yimeng Wang, Bocen Chen, Pengfei Jing
Deep in-situ rock mechanics considers the influence of the in-situ environment on mechanical properties, differentiating it from traditional rock mechanics. To investigate the effect of in-situ stress, pore pressure preserved environment on the mechanical difference of sandstone, four tests are numerically modeled by COMSOL: conventional triaxial test, conventional pore pressure test, in-situ stress
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Stress-unloading and gas migration improvement mechanism in the soft and hard interbedded coal seam using directional hydraulic flushing technology Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-08-28 Hao Zhang, Yuanping Cheng, Cunbao Deng, Jingyu Jiang, Lei Zhang, Xiaoyu Yan, Junwei Guo, Suifang Wang
To enhance gas drainage in the soft and hard interbedded (SHI) coal seam, it’s necessary to unload the in-situ stress and improve its gas migration performance. In this research, a directional hydraulic flushing (DHF) technology was carried out. The stress-unloading and gas migration improvement mechanism was analyzed through numerical simulation, and systematic engineering tests were conducted to
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Dynamic damage evolution of bank slopes with serrated structural planes considering the deteriorated rock mass and frequent reservoir-induced earthquakes Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-08-22 Xinrong Liu, Yan Wang, Bin Xu, Xiaohan Zhou, Xueyan Guo, Luli Miao
To investigate the dynamic damage evolution characteristics of bank slopes with serrated structural planes, the shaking table model test and the numerical simulation were utilized. The main findings indicate that under continuous seismic loads, the deformation of the bank slope increased, particularly around the hydro-fluctuation belt, accompanying by the pore water pressure rising. The soil pressure
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Study of a low-disturbance pressure-preserving corer and its coring performance in deep coal mining conditions Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-08-21 Wei Huang, Jianan Li, Zhiqiang Liu, Mingqing Yang, Zhenxi You, Heping Xie
With the increasing depth of coal mining, the requirements for coring devices that maintain pressure are increasing. To adapt to the special environment in deep coal seams and improve the accuracy of testing gas content, a low-disturbance pressure-preserving corer was developed. The measurement of gas content using this corer was analyzed. The coring test platform was used to complete a coring function
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Drilling-based measuring method for the c-φ parameter of rock and its field application Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-08-08 Bei Jiang, Fenglin Ma, Qi Wang, Hongke Gao, Dahu Zhai, Yusong Deng, Chuanjie Xu, Liangdi Yao
The technology of drilling tests makes it possible to obtain the strength parameter of rock accurately in situ. In this paper, a new rock cutting analysis model that considers the influence of the rock crushing zone (RCZ) is built. The formula for an ultimate cutting force is established based on the limit equilibrium principle. The relationship between digital drilling parameters (DDP) and the c-φ
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Anchorage performance of large-diameter FRP bolts and their application in large deformation roadway Int. J. Min. Sci. Technol. (IF 11.8) Pub Date : 2023-08-04 Jun Han, Zuoqing Bi, Bing Liang, Chen Cao, Shuangwen Ma
In underground coal mines, fibre reinforced polymer (FRP) bolt is ideal for mined rib reinforcements as it can prevent gas explosions caused by shearer frictional spark. With increasing mining depth, small diameter FRP bolts used in shallow underground mining cannot fulfil the rib support requirements. Under the engineering background of deep underground shortwall mining in Wudong coal mine, this paper