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Experiment on the silica sol imbibition of low-permeability rock mass: With silica sol particle sizes and rock permeability considered Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-08-06 Zhe Xiang, Nong Zhang, Yiming Zhao, Dongjiang Pan, Xiaowei Feng, Zhengzheng Xie
It’s a universal engineering problem to seal micro-cracks of low-permeability argillaceous rock mass by grouting in the fields of civil engineering and mining. This paper achieved the grouting sealing of low- permeability artificial rocks with the permeability of 0.1–40 mD by adopting silica sol imbibition grouting. The variation characteristics of particle size, viscosity, and contact angle of silica
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Influence of maximum principal stress direction on the failure process and characteristics of D-shaped tunnels Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-08-02 Linqi Huang, Xuefeng Si, Xibing Li, Fengqiang Gong, Yong Luo
To investigate the failure process and characteristics of D-shaped tunnels under different maximum principal stress directions θ, true-triaxial tests were conducted on cubic sandstone samples with a through D-shaped hole. The test results show that the failure process can be divided into 4 periods: calm, buckling deformation, gradual buckling and exfoliation of rock fragment, and formation of a V-shaped
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Intelligent prediction of slope stability based on visual exploratory data analysis of 77 in situ cases Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-07-29 Guangjin Wang, Bing Zhao, Bisheng Wu, Chao Zhang, Wenlian Liu
Slope stability prediction research is a complex non-linear system problem. In carrying out slope stability prediction work, it often encounters low accuracy of prediction models and blind data preprocessing. Based on 77 field cases, 5 quantitative indicators are selected to improve the accuracy of prediction models for slope stability. These indicators include slope angle, slope height, internal friction
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Influence of colloidal nanosilica on hydration kinetics and properties of CaO/CaSO4-activated slag binder Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-07-23 Qing Liu, Qingming He, Ruoyun Li, Yanfei Feng, Xianjun Lyu, Junxiang Wang, Lin Li
To solve the energy consumption and CO2 emission during cement production, the new binders must be developed as an alternative to cement. CaO/CaSO4-activated slag binder is an eco-friendly and safe cementitious material; however, its low strength during initial stages limits its applications. In this study, colloidal nanosilica (CNS) was employed as an additive to improve the strength of CaO/CaSO4-activated
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Cyclic constitutive equations of rock with coupled damage induced by compaction and cracking Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-07-15 Chonghong Ren, Jin Yu, Xueying Liu, Zhuqing Zhang, Yanyan Cai
In this paper, the cyclic constitutive equations were proposed to describe the constitutive behavior of cyclic loading and unloading. Firstly, a coupled damage variable was derived, which contains two parts, i.e., the compaction-induced damage and the cracking-induced damage. The compaction-induced damage variable was derived from a nonlinear stress–strain relation of the initial compaction stage,
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Insight into the microstructural evolution of anthracite during carbonization-graphitization process from the perspective of materialization Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-07-10 Huihui Zeng, Baolin Xing, Yijun Cao, Bing Xu, Lei Hou, Hui Guo, Song Cheng, Guangxu Huang, Chuanxiang Zhang, Qi Sun
Materialization of coal is one of effective and clean pathways for its utilization. The microstructures of coal-based carbon materials have an important influence on their functional applications. Herein, the microstructural evolution of anthracite in the temperature range of 1000–2800 °C was systematically investigated to provide a guidance for the microstructural regulation of coal-based carbon materials
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Instability energy mechanism of super-large section crossing chambers in deep coal mines Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-07-08 Deyuan Fan, Xuesheng Liu, Yunliang Tan, Xuebin Li, Purev Lkhamsuren
The stress concentration and failure at chamber intersections in coal mine are intense, especially in deep-buried, super-large section conditions. In this paper, the plastic radius of super-large section chamber under unequal pressure was corrected on the basis of the size effect. Then, stress and failure evolution of intersections under different crossing angles and equivalent angular bisectors were
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Effect of deep oxidation of chalcopyrite on surface properties and flotation performance Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-06-29 Qingyun Luo, Qing Shi, Dezhi Liu, Binbin Li, Saizhen Jin
In this study, chalcopyrite was oxidized in hydrogen peroxide (H2O2) solutions of different concentrations to simulate different degrees of oxidation in real ores, and the effects of H2O2 treatment on chalcopyrite surface properties and flotation performance were investigated by surface analysis techniques and floatation experiments, which implied the reason for the poor grade and recovery of oxidized
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Adsorption behavior and mechanism of copper ions in the sulfidization flotation of malachite Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-06-27 Han Wang, Shuming Wen, Guang Han, Yongxin He, Qicheng Feng
Malachite is one of the main minerals used for the industrial enrichment and recovery of copper oxide resources, and copper ions are unavoidable metal ions in the flotation pulp. The microflotation, contact angle, and adsorption experiments indicated that pretreatment with an appropriate concentration of copper ions could improve the malachite recovery, and the addition of excess copper ions reduced
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An investigation of machine learning techniques to estimate minimum horizontal stress magnitude from borehole breakout Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-06-25 Huasheng Lin, Sarvesh Kumar Singh, Zizhuo Xiang, Won Hee Kang, Simit Raval, Joung Oh, Ismet Canbulat
Borehole breakout is a widely utilised phenomenon in horizontal stress orientation determination, and breakout geometrical parameters, such as width and depth, have been used to estimate both horizontal stress magnitudes. However, the accuracy of minimum horizontal stress estimation from borehole breakout remains relatively low in comparison to maximum horizontal stress estimation. This paper aims
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Resistivity response of coal under hydraulic fracturing with different injection rates: A laboratory study Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-06-22 Mingyang Song, Quangui Li, Qianting Hu, Yanqing Wu, Guanhua Ni, Yangcheng Xu, Yuebing Zhang, Liangping Hu, Jialin Shi, Jichuan Liu, Yize Deng
Resistivity will have different response characteristics to the hydraulic fracture propagation process. In this work, a resistivity testing system for hydraulic fracturing specimens was established. Resistivity and acoustic emission (AE) information were jointly analysed to determine the dynamic response characteristics of resistivity during hydraulic fracture propagation. The results show that the
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Determination of the constant mi in the Hoek-Brown criterion of rock based on drilling parameters Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-06-18 Haoteng Wang, Mingming He, Zhiqiang Zhang, Jiwei Zhu
The constant mi in the Hoek-Brown (H-B) criterion is a fundamental parameter required for determining the compressive strength of rock. In this paper, drilling parameters provide a new basis for determining the constant mi. An analytical relationship between the drilling parameters and constant mi is established in consideration of the contact response between the drilling bit and the cut rock in the
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A novel robust AE/MS source location method using optimized M-estimate consensus sample Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-06-17 Yichao Rui, Zilong Zhou, Xin Cai, Riyan Lan, Congcong Zhao
Due to the complexity of the real engineering environment, the arrival measurement inevitably contains outliers and leads to serious location errors. In order to eliminate the influence of the outliers effectively, this paper proposes a novel robust AE/MS source localization method using optimized M-estimate consensus sample. First, a sample subset is selected from the entire arrival set to obtain
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A review of flotation and selective separation of pyrrhotite: A perspective from crystal structures Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-06-09 Xiaoqin Tang, Ye Chen
Pyrrhotite is an associated mineral that exists widely in sulfide ore. The presence of pyrrhotite will affect the recovery of platinum group minerals. Therefore, researchers have paid increasing attention to the flotation separation of pyrrhotite. Pyrrhotite superstructures owning different Fe/S ratios results in various crystal structures, corresponding to different physical, chemical and electronic
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Dynamic mechanical properties and wave propagation of composite rock-mortar specimens based on SHPB tests Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-06-08 Zhenyu Han, Diyuan Li, Xibing Li
Filled inclusions in rock discontinuities play a key role in the mechanical characteristics of the rock and thereby influence the stability of rock engineering. In this study, a series of impact tests were performed using a split Hopkinson pressure bar system with high-speed photography to investigate the effect of interlayer strength on the wave propagation and fracturing process in composite rock-mortar
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Insights into the adsorption performance and mechanism of hydrated Ca ion on talc (0 0 1) basal surface from DFT calculation Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-06-02 Yuanjia Luo, Leming Ou, Jianhua Chen, Guofan Zhang, Yuqin Xia, Bohan Zhu, Hanyu Zhou
The utilization of Ca ion as assistant depressant of CMC on talc has been widely reported. Thus, the study on the adsorption mechanism of Ca ion on talc surface is very crucial for understanding the performance of CMC on talc depression. In this paper, mechanism insights into hydrated Ca ion adsorption on talc (0 0 1) basal surface were creatively provided using DFT calculation. [Ca(H2O)6]2+ and [Ca(OH)(H2O)3]+
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Experimental study on the mechanical and failure behaviors of deep rock subjected to true triaxial stress: A review Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-05-30 Heping Xie, Jun Lu, Cunbao Li, Minghui Li, Mingzhong Gao
It has become an inevitable trend of human development to seek resources from the deep underground. However, rock encountered in deep underground engineering is usually in an anisotropic stress state (σ1 > σ₂>σ3) due to the influences of geological structures and engineering disturbances. It is therefore essential to study the mechanical, seepage, and dynamic disaster behaviors of deep rock under true
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Theoretical and experimental study on the rheological properties of WIS grout and the dispersion and sealing mechanism Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-05-28 Mengmeng Zhou, Shucai Li, Zhuo Zheng, Rentai Liu, Mengjun Chen, Chenyang Ma
Recently a new grout material called WIS was invented for sealing water inflow in tunneling and underground constructions. In this study, a special experimental method called Intubated Counter Grouting (ICG) was proposed to investigate the influence of water dispersion on the rheological properties of the grout during the grouting process, and to testify the sealing performance of the grout, such as
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A simple method for determining independent fracture toughness and tensile strength of rock Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-05-24 Junfeng Guan, Yulong Zhang, Jiangfeng Meng, Xianhua Yao, Lielie Li, Shuanghua He
This paper develops a model that only requires two sets of small-size rock specimens with the ratio of the structural geometry parameter maximum to minimum ae,max:ae,min ≥ 3:1 to determine the rock fracture and strength parameters without size effect and predict the actual structural performance of rock. Regardless of three-point-bending, four-point-bending, or a combination of the above two specimen
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Application of multi-stage dynamic magnetizing roasting technology on the utilization of cryptocrystalline oolitic hematite: A review Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-05-23 Hanquan Zhang, Pengfei Zhang, Feng Zhou, Manman Lu
A large number of studies have shown that oolitic hematite is an iron ore that is extremely difficult to utilize because of its fine disseminated particle size, high harmful impurity content and oolitic structure. To recover iron from oolitic hematite, we developed a novel multistage dynamic magnetizing roasting technology. Compared with traditional magnetizing roasting technologies, this novel technology
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Influences of different modifiers on the disintegration of improved granite residual soil under wet and dry cycles Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-05-21 Yinlei Sun, Qixin Liu, Hansheng Xu, Yuxi Wang, Liansheng Tang
The disintegration of granite residual soil is especially affected by variations in physical and chemical properties. Serious geologic hazards or engineering problems are closely related to the disintegration of granite residual soil in certain areas. Research on the mechanical properties and controlling mechanisms of disintegration has become a hot issue in practical engineering. In this paper, the
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A five-parameter constitutive model for hysteresis shearing and energy dissipation of rock joints Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-05-18 Yikun Li, Tongbin Zhao, Yifei Li, Yang Chen
Rock joints exhibit hysteresis shearing behavior and produce energy dissipation under shear cyclic loads, which however cannot be accurately depicted by existing constitutive models. This paper establishes a constitutive model for hysteresis shearing and associated energy dissipation of rock joints. Analytical expressions of the model during cyclic shearing processes are derived. Derivation of the
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A new energy-absorbing bolt used for large deformation control of tunnel surrounding rock Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-05-07 Junbao Wang, Wei Liu, Zhanping Song, Lingfeng Li, Shijin Feng, Yun Cheng
In order to control the large deformation of tunnel surrounding rock, a new energy-absorbing bolt is developed. This bolt can be transformed into a rigid support when the deformation of the surrounding rock reaches the length of the sleeve tube, thus preventing the surrounding rock from continuing to deform. Moreover, this bolt has a simple structure and is easy to manufacture and assemble. Then the
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Nonlinear criterion for strength mobilization in brittle failure of rock and its extension to the tunnel scale Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-05-05 Rodolfo Cabezas, Javier Vallejos
As underground excavations are getting deeper and field stresses increase, the behavior of intact rock blocks plays an increasingly important role in understanding and estimating the overall rock mass strength. To model the brittle behavior of intact rock blocks, the stress–strain curve is usually idealized considering a linear strength mobilization approach (cohesion-weakening-friction-strengthening
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Evolution and modeling of mine water inflow and hazard characteristics in southern coalfields of China: A case of Meitanba mine Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-04-11 Jinhai Liu, Yanlin Zhao, Tao Tan, Lianyang Zhang, Sitao Zhu, Fangyan Xu
In this paper, the hydrogeological characteristics in the southern coalfields of China are first briefly outlined. Then, taking the Meitanba mine as an example, the evolution and modeling of mine water inflow are studied. Finally, the hazard characteristics related to mine water and mud inrush are analyzed. The results show that the main mine water sources in the Meitanba mine area are groundwater
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Effect of bastnaesite as reductant on hematite reduction during in-situ suspension magnetization roasting of refractory iron ore under neutral atmosphere Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-04-08 Wenbo Li, Jijia Chen, Wentao Zhou, Yuexin Han, Yan Shan
The iron tailings of Bayan Obo mines are solid waste, which occupies land area and also causes environmental pollution; however, this waste can be recycled. In this study, based on the characteristics of iron minerals and fluorocarbonate contained in Bayan Obo iron tailings, clean magnetization roasting of iron minerals by bastnaesite from iron tailings during in-situ suspension magnetization roasting
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Fracture characteristics of iron ore under uncoupled blast loading Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-04-08 Jinjing Zuo, Renshu Yang, Min Gong, Xinmin Ma, Yanbing Wang
A blasting experiment was conducted on iron ore samples by considering multiple coupling charge coefficients. The resulting internal fracture and damage characteristics were quantitatively analyzed via computerized tomography (CT), scanning, and three-dimensional (3D) model reconstruction. The results show that the iron ore primarily displayed radial and circumferential cracks along the blast hole
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Resource utilization of slag from desulphurization and slag skimming: A comprehensive recycling process of all components Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-03-30 Xiao Liu, Peng Gao, Yuexin Han
In order to make the slag from desulphurization and slag skimming (SDSS) to be comprehensively recycled and utilized, a combined process of beneficiation and building materials preparation was proposed to recover iron from SDSS, meanwhile to apply the remaining slag tailings as cement admixture. From this process, three iron-rich products were recovered in stages by clean gravity - magnetic separation
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Trace element geochemistry and stable isotopic (δ13C and δ15N) records of the Paleocene coals, Salt Range, Punjab, Pakistan Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-03-30 Noshin Masood, Tehseen Zafar, Karen A. Hudson-Edwards, Hafiz U. Rehman, Abida Farooqi
The Paleocene coals of the Salt Range in the Punjab Province of Pakistan have great economic potential; however, their trace element and stable isotopic characteristics have not been studied in detail except for a few sporadic samples. In this study, a total of 59 coal samples of which 14 are obtained from open cast mines have been investigated for elemental composition and δ13C-δ15N isotopic signatures
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Selective depression action of taurine in flotation separation of specularite and chlorite Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-03-21 Mingyang Li, Cheng Yang, Zhaoyang Wu, Xiangpeng Gao, Xiong Tong, Xiankun Yu, Hongming Long
Chlorite, as the most representative gangue mineral associated with specularite, of which the separation of these two minerals is difficult. This paper investigated the depression effect of taurine on specularite/chlorite separation via flotation experiments, adsorption tests, contact angle measurements, Zeta potential detection, FT-IR measurements, and XPS analyses. The results of single mineral flotation
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Dynamic mechanical characteristics and application of constant resistance energy-absorbing supporting material Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-03-19 Qi Wang, Shuo Xu, Manchao He, Bei Jiang, Huayong Wei, Yue Wang
In deep underground engineering, rock burst and other dynamic disasters are prone to occur due to stress concentration and energy accumulation in surrounding rock. The control of dynamic disasters requires bolts and cables with high strength, high elongation, and high energy-absorbing capacity. Therefore, a constant resistance energy-absorbing (CREA) material is developed. In this study, the dynamic
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A cost-effective approach to recycle serpentine tailings: Destruction of stable layered structure and solvent displacement crystallization Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-03-19 Wengang Liu, Xiangyu Peng, Wenbao Liu, Naixu Zhang, Xinyang Wang
In this work, the stable layer structure of serpentine, which seriously restricts the extraction of magnesium, was broken down, and a nearly 94% leaching efficiency of Mg was obtained by adding 5% fluorite powder. Compared with the system without fluorite, the Mg leaching efficiency increased by 36.42%. This result was achieved because the complexation of fluorinion (F−) with Si in serpentine promoted
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Integration of preparation of K, Na-embedded activated carbon and reduction of Zn-bearing dusts Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-03-16 Dingzheng Wang, Deqing Zhu, Jian Pan, Zhengqi Guo, Congcong Yang, Hongyu Tian, Yuxiao Xue
Large amounts of solid wastes and flue gases are generated in iron and steel production process, probably leading to serious environmental pollution without duly handle. An innovative and green process of simultaneous reduction of zinc-bearing dusts and activation of low-rank coal was developed and its mechanism was clarified in this paper. Under the optimal conditions, the reduced zinc-bearing dusts
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A computational fluid dynamics investigation of a novel flooded-bed dust scrubber with vibrating mesh Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-03-14 Zhaokuan Lu, Aishwarya Rath, Seyed Hassan Amini, Aaron Noble, Shima Shahab
This work proposes a vibrating mesh screen as an alternative to the static mesh screen currently used in conventional flooded-bed dust scrubbers for removing airborne coal mine dust in the continuous mining environment. Fundamental assessments suggest that a vibrating screen may improve the dust collection efficiency of scrubber systems and mitigate the clogging issues associated with the conventional
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Experimental study on the influence of hydrostatic stress on the Lode angle effect of porous rock Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-03-12 Zhenlong Song, Zhenguo Zhang, P.G. Ranjith, Wanchun Zhao, Chao Liu
To investigate the deformation mechanisms of rock under hydrostatic stress, destructive experiments were conducted on sandstone under different levels of hydrostatic stress and stress Lode angles. The results reveal that the shape of the strength envelope on the π plane gradually changes from the shape of the Lade criterion to the shape of the Drucker-Prage criterion with an increase in hydrostatic
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Influence of temperature on the transformation and self-control of energy during sandstone damage: Experimental and theoretical research Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-03-10 Lan Qiao, Jiawang Hao, Zhiyi Liu, Qingwen Li, Naifu Deng
The surrounding rock in tunnelling engineering and coal mining will sometimes be exposed to high temperature. Rock failure is the result of energy dissipation, and the study of the evolution and transformation behavior of energy is of great significance for the in-depth understanding of the deformation and failure of rock after high temperature. This study analyzed the intrinsic connection between
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Hydrothermal synthesis of zeolites-calcium silicate hydrate composite from coal fly ash with co-activation of Ca(OH)2-NaOH for aqueous heavy metals removal Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-03-07 Guanghui Li, Min Li, Xin Zhang, Pengxu Cao, Hao Jiang, Jun Luo, Tao Jiang
Coal fly ash is a typical secondary aluminum/silicon resource. The preparation of zeolite-type absorbent is a potential way for its value-added utilization, while the purity and adsorption property of zeolite are limited due to the occurrence of side reactions in the synthesis process. In this study, a designated composite consisted of crystalline zeolites and amorphous calcium silicate hydrate was
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Longwall mining automation horizon control: Coal seam gradient identification using piecewise linear fitting Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-03-03 Shibo Wang, Shijia Wang
Horizon control, maintaining the alignment of the shearer’s exploitation gradient with the coal seam gradient, is a key technique in longwall mining automation. To identify the coal seam gradient, a geological model of the coal seam was constructed using in-seam seismic surveying technology. By synthesizing the control resolution of the range arm and the geometric characteristics of the coal seam,
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Pore structure characterization and seepage analysis of ionic rare earth orebodies based on computed tomography images Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-03-02 Xianping Luo, Yongbing Zhang, Hepeng Zhou, Kunzhong He, Boyuan Zhang, Dongming Zhang, Weijing Xiao
Pore network structure of ore body is a diffusion channel of leaching agent solution that exerts a significant influence on seepage. The ore body structure, pore distribution, pore and throat size, and pore network characteristics of topsoil, weathered, and semiweathered layers of ionic rare earth ore in southern Jiangxi Province were explored in this study. The effect of leaching operation on the
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Enrichment of Nb and Ti from carbonatite pyrochlore ore via calcining-slaking followed by gravity separation Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-02-26 Shuhui Zhang, Mingjun Rao, Rendong Xiao, Jinxiang You, Guanghui Li, Tao Jiang
In this work, a novel process consisting of calcining-slaking followed by gravity separation for the enrichment of niobium (Nb) and titanium (Ti) from carbonatite pyrochlore ore was proposed, validated and compared with the current mainstream flotation method. During calcining of the pyrochlore ore, within which the carbonates were transformed into lime. Subsequently, when the calcined ore was slaked
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Mechanism and control technology of strong ground pressure behaviour induced by high-position hard roofs in extra-thick coal seam mining Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-02-24 Chao Pan, Binwei Xia, Yujun Zuo, Bin Yu, Changnan Ou
This work aimed at revealing the mechanism of strong ground pressure behaviour (SGPB) induced by high-position hard roof (HHR). Based on the supporting structures model of HHR, a modified voussoir beam mechanical model for HHR was established by considering the gangue support coefficient, through which the modified expressions of limit breaking span and breaking energy of HHR were deduced. Combined
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Experimental investigation on hard rock fragmentation of inserted tooth cutter using a newly designed indentation testing apparatus Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-02-23 Jiuqun Zou, Weihao Yang, Tao Zhang, Xiaofei Wang, Min Gao
This investigation aims to explore the effects of stress conditions and rock cutting rates on hard rock fragmentation through indentation tests on a newly designed triaxial testing apparatus. This apparatus was designed to realize a triaxial loading and indentation test of cylindrical specimens using inserted tooth cutter. The boreability and crushing efficiency of granite rock was investigated by
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Prediction of landslide displacement with dynamic features using intelligent approaches Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-02-19 Yonggang Zhang, Jun Tang, Yungming Cheng, Lei Huang, Fei Guo, Xiangjie Yin, Na Li
Landslide displacement prediction can enhance the efficacy of landslide monitoring system, and the prediction of the periodic displacement is particularly challenging. In the previous studies, static regression models (e.g., support vector machine (SVM)) were mostly used for predicting the periodic displacement. These models may have bad performances, when the dynamic features of landslide triggers
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Review of preventive and constructive measures for coal mine explosions: An Indian perspective Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-02-19 Santosh Kumar Ray, Asfar Mobin Khan, Niroj Kumar Mohalik, Debashish Mishra, Somu Mandal, Jai Krishna Pandey
Firedamp and coal dust explosion constitute a lion’s share in mine accidents in a global mining scenario. This paper reports a list of mine explosion disasters since last two decades, a critical review of the different prevention and constructive measures, and its recent development to avoid firedamp and coal dust explosion. Preventive legislation in core coal-producing countries, viz. China, USA,
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Role of ammonium sulfate in sulfurization flotation of azurite: Inhibiting the formation of copper sulfide colloid and its mechanism Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-02-17 Jinpeng Cai, Chao Su, Yinyu Ma, Xingcai Yu, Rong Peng, Jiangli Li, Xiaolin Zhang, Jianjun Fang, Peilun Shen, Dianwen Liu
In this study, the role of (NH4)2SO4 during the sulfurization of azurite and its response to flotation were investigated. The flotation results showed that adding (NH4)2SO4 prior to sulfurization decreased the formation of colloid in flotation pulp, and the floatability of the suppressed azurite caused by excess sodium sulfide was restored. After adding (NH4)2SO4 prior to sulfurization, the formation
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Hydration mechanisms of smithsonite from DFT-D calculations and MD simulations Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-02-10 Yuanjia Luo, Leming Ou, Jianhua Chen, Guofan Zhang, Yuqin Xia, Bohan Zhu, Hanyu Zhou
Investigation on the mineral−water interactions is crucial for understanding the subsequent interfacial reactions. Currently, the hydration mechanisms of smithsonite are still obscure. In this paper, the adsorption of H2O at different coverage rates on smithsonite (1 0 1) surface was innovatively investigated using density-functional theory (DFT) calculations and molecular dynamics (MD) simulations
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Experimental study on the mechanical properties and consolidation mechanism of microbial grouted backfill Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-02-07 Xuejie Deng, Yu Li, Fei Wang, Xiaoming Shi, Yinchao Yang, Xichen Xu, Yanli Huang, Benjamin de Wit
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Shape ratio effects on the mechanical characteristics of rectangular prism rocks and isolated pillars under uniaxial compression Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-02-03 Kun Du, Xuefeng Li, Rui Su, Ming Tao, Shizhan Lv, Jia Luo, Jian Zhou
Isolated pillars in underground mines are subjected to uniaxial stress, and the load bearing cross-section of pillars is commonly rectangularly shaped. In addition, the uniaxial compression test (UCT) is widely used for determining the basic mechanical properties of rocks and revealing the mechanism of isolated pillar disasters under unidimensional stress. The shape effects of rock mechanical properties
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Testing the robustness of particle-based separation models for the magnetic separation of a complex skarn ore Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-02-02 Lucas Pereira, Max Frenzel, Markus Buchmann, Marius Kern, Raimon Tolosana-Delgado, K. Gerald van den Boogaart, Jens Gutzmer
Physical separation processes are best understood in terms of the behaviour of individual ore particles. Yet, while different empirical particle-based separation modelling approaches have been developed, their predictive performance has never been tested under variable process conditions. Here, we investigated the predictive performance of a state-of-the-art particle-based separation model under variable
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Acoustic emission source location method and experimental verification for structures containing unknown empty areas Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-01-31 Longjun Dong, Qing Tao, Qingchun Hu, Sijia Deng, Yongchao Chen, Qiaomu Luo, Xihong Zhang
Acoustic emission (AE) localization plays an important role in the prediction and control of potential hazardous sources in complex structures. However, existing location methods have less discussion on the presence of unknown empty areas. This paper proposes an AE source location method for structures containing unknown empty areas (SUEA). Firstly, this method identifies the shape, size, and location
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A local homogenization approach for simulating the reinforcement effect of the fully grouted bolt in deep underground openings Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-01-21 Dingping Xu, Xiuyang Liu, Quan Jiang, Shaojun Li, Yangyi Zhou, Shili Qiu, Fei Yan, Hong Zheng, Xiang Huang
Fully grouted bolts are a key component of the support system for underground openings. Although considerable effort has been made in the simulation of the reinforcement effect of the fully grouted bolts on the rock masses surrounding underground openings, most of the work has limited significance since the structural element approach is used. This study proposes a local homogenization approach (L-H
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Risk assessment of fault water inrush during deep mining Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-01-19 Zhaodan Cao, Qixiong Gu, Zhen Huang, Jiaju Fu
With the gradual depletion of shallow coal resources, the Yanzhou mine in China will enter the lower coal seam mining phase. However, as mining depth increases, lower coal seam mining in Yanzhou is threatened by water inrush in the Benxi Formation limestone and Ordovician limestone. The existing prediction models for the water burst at the bottom of the coal seam are less accurate than expected owing
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Experimental study on preparation of nanoparticle-surfactant nanofluids and their effects on coal surface wettability Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2022-01-11 Gang Wang, Yanqing Li, Enmao Wang, Qiming Huang, Shibin Wang, Huaixing Li
To improve the efficiency of coal seam water injection, the influence of nanofluids on coal surface wettability was studied based on the nano drag reduction and injection enhancement technology in the field of tertiary oil recovery. The composition optimization and performance evaluation of nanofluids with nano-silica and sodium lauryl sulfate as the main components were carried out, and the effects
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AFM characterization of surface mechanical and electrical properties of some common rocks Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2021-12-30 Xianghui Tian, Xueqiu He, Dazhao Song, Zhenlei Li, Majid Khan, Huifang Liu, Liming Qiu
The characterization of micro-surface mechanical and electrical properties of the natural rock materials remains inadequate, and their macroscopic performance can be better comprehended by investigating the surface properties. With this purpose, the present research focuses on characterizing the micro-surface morphology, Derjaguin-Muller-Toporov (DMT) modulus, adhesion, and potential of granite, shale
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Insights into the influence of temperature on the adsorption behavior of sodium oleate and its response to flotation of quartz Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2021-12-29 Shaohang Cao, Wanzhong Yin, Bin Yang, Zhanglei Zhu, Haoran Sun, Qiuyue Sheng, Keqiang Chen
Temperature affects the flotation of quartz in the calcium/sodium oleate (NaOL) system, while there is a lack of understanding of its potential mechanism. Therefore, in this work, the flotation response of quartz to temperature was investigated via micro-flotation experiments, interface property analyses, and theoretical calculations. Flotation results demonstrated that increasing temperature contributed
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Centrifuge experiment on the penetration test for evaluating undrained strength of deep-sea surface soils Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2021-12-28 Xingsen Guo, Tingkai Nian, Wei Zhao, Zhongde Gu, Chunpeng Liu, Xiaolei Liu, Yonggang Jia
Rapid advances in deep-sea mining engineering have created an urgent need for the accurate evaluation of the undrained strength of marine soils, especially surface soils. Significant achievements have been made using full-flow penetration penetrometers to evaluate marine soil strength in the deep penetration; however, a method considering the effect of ambient water on the surface penetration needs
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Insight into mineral flotation fundamentals through the DFT method Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2021-10-18 Weiyong Cui, Jianhua Chen
Flotation is a complex process that occurs in solid–liquid-gas multiphase systems, and its main factors include the minerals, separation medium, as well as various flotation reagents. The study of mineral properties and interactions with other components such as reagents and water lays the basic theoretical foundation for flotation. Density functional theory (DFT) calculations can qualitatively evaluate
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Destabilising persistent coal froth using silicone oil Int. J. Min. Sci. Technol. (IF 7.67) Pub Date : 2021-11-19 Shiqi Liu, Xumeng Chen, Yongjun Peng
Persistent froth is becoming more and more common in coal and mineral flotation plants and presents safety and operational challenges. No effective method has been developed to destabilise persistent froth. As a new initiative, this study examined the structural difference between persistent foam and coal froth, based on which a solution was developed to maximumly destabilise coal froth. Destabilisation