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Optimizing profile line interval for enhanced accuracy in rock joint morphology and shear strength assessments Int. J. Min. Sci. Technol. (IF 11.7) Pub Date : 2024-06-21 Leibo Song, Quan Jiang, Shigui Du, Jiamin Song, Gang Wang, Yanting Gu, Xingkai Wang, Jinzhong Wu
2D profile lines play a critical role in cost-effectively evaluating rock joint properties and shear strength. However, the interval (Δ) between these lines significantly impacts roughness and shear strength assessments. A detailed study of 45 joint samples using four statistical measures across 500 different Δ values identified a clear line interval effect with two stages: stable and fluctuation-discrete
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Stability analysis of longwall top-coal caving face in extra-thick coal seams based on an innovative numerical hydraulic support model Int. J. Min. Sci. Technol. (IF 11.7) Pub Date : 2024-05-31 Jun Guo, Wenbo Huang, Guorui Feng, Jinwen Bai, Lirong Li, Zi Wang, Luyang Yu, Xiaoze Wen, Jie Zhang, Wenming Feng
The relationship between support and surrounding rock is of great significance to the control of surrounding rock in mining process. In view of the fact that most of the existing numerical simulation methods construct virtual elements and stress servo control to approximately replace the hydraulic support problem, this paper establishes a new numerical model of hydraulic support with the same working
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Three-dimensional stability calculation method for high and large composite slopes formed by mining stope and inner dump in adjacent open pits Int. J. Min. Sci. Technol. (IF 11.7) Pub Date : 2024-05-25 Zuchao Liang, Dong Wang, Guanghe Li, Guangyu Sun, Mingyu Yu, Dong Xia, Chunjian Ding
The 2D limit equilibrium method is widely used for slope stability analysis. However, with the advancement of dump engineering, composite slopes often exhibit significant 3D mechanical effects. Consequently, it is of significant importance to develop an effective 3D stability calculation method for composite slopes to enhance the design and stability control of open-pit slope engineering. Using the
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Comparative analysis of thermodynamic and mechanical responses between underground hydrogen storage and compressed air energy storage in lined rock caverns Int. J. Min. Sci. Technol. (IF 11.7) Pub Date : 2024-05-22 Bowen Hu, Liyuan Yu, Xianzhen Mi, Fei Xu, Shuchen Li, Wei Li, Chao Wei, Tao Zhang
Underground hydrogen storage (UHS) and compressed air energy storage (CAES) are two viable large-scale energy storage technologies for mitigating the intermittency of wind and solar power. Therefore, it is meaningful to compare the properties of hydrogen and air with typical thermodynamic storage processes. This study employs a multi-physical coupling model to compare the operations of CAES and UHS
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Enhancing XRF sensor-based sorting of porphyritic copper ore using particle swarm optimization-support vector machine (PSO-SVM) algorithm Int. J. Min. Sci. Technol. (IF 11.7) Pub Date : 2024-05-18 Zhengyu Liu, Jue Kou, Zengxin Yan, Peilong Wang, Chang Liu, Chunbao Sun, Anlin Shao, Bern Klein
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A novel box-counting method for quantitative fractal analysis of three-dimensional pore characteristics in sandstone Int. J. Min. Sci. Technol. (IF 11.7) Pub Date : 2024-05-17 Huiqing Liu, Heping Xie, Fei Wu, Cunbao Li, Renbo Gao
Fractal theory offers a powerful tool for the precise description and quantification of the complex pore structures in reservoir rocks, crucial for understanding the storage and migration characteristics of media within these rocks. Faced with the challenge of calculating the three-dimensional fractal dimensions of rock porosity, this study proposes an innovative computational process that directly
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Enhancing sustainability in phosphate ore processing: Performance of frying oil as alternative flotation collector for carbonate removal Int. J. Min. Sci. Technol. (IF 11.7) Pub Date : 2024-05-14 Asmae El-bahi, Yassine Taha, Yassine Ait-Khouia, Abdellatif Elghali, Mostafa Benzaazoua
Recycling waste frying oils for the synthesis of flotation reagents presents a promising avenue for sustainable waste management. Moreover, it offers a cost-effective solution for crafting a specialized collector designed to efficiently remove carbonates and enhance phosphate enrichment in froth flotation processes. This study focuses on the synthesis of an anionic collector using the saponification
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A photogrammetric approach for quantifying the evolution of rock joint void geometry under varying contact states Int. J. Min. Sci. Technol. (IF 11.7) Pub Date : 2024-05-11 Rui Yong, Changshuo Wang, Nick Barton, Shigui Du
Accurate measurement of the evolution of rock joint void geometry is essential for comprehending the distribution characteristics of asperities responsible for shear and seepage behaviors. However, existing techniques often require specialized equipment and skilled operators, posing practical challenges. In this study, a cost-effective photogrammetric approach is proposed. Particularly, local coordinate
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The influence of inter-band rock on rib spalling in longwall panel with large mining height Int. J. Min. Sci. Technol. (IF 11.7) Pub Date : 2024-05-03 Jiachen Wang, Meng Li, Zhaohui Wang, Zheng Li, Han Zhang, Shixiong Song
In order to improve rib stability, failure criteria and instability mode of a thick coal seam with inter-band rock layer are analysed in this study. A three-dimensional mechanical model is established for the rib by considering the rock layer. A safety factor is defined foy the rib, and it is observed that the safety factor exhibits a positive correlation with the thickness and strength of the inter-band
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Effects of fracture evolution and non-Darcy flow on the thermal performance of enhanced geothermal system in 3D complex fractured rock Int. J. Min. Sci. Technol. (IF 11.7) Pub Date : 2024-04-22 Yachen Xie, Jianxing Liao, Pengfei Zhao, Kaiwen Xia, Cunbao Li
In fractured geothermal reservoirs, the fracture networks and internal fluid flow behaviors can significantly impact the thermal performance. In this study, we proposed a non-Darcy rough discrete fracture network (NR-DFN) model that can simultaneously consider the fracture evolution and non-Darcy flow dynamics in studying the thermo-hydro-mechanical (THM) coupling processes for heat extraction in geothermal
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Rock mass quality prediction on tunnel faces with incomplete multi-source dataset via tree-augmented naive Bayesian network Int. J. Min. Sci. Technol. (IF 11.7) Pub Date : 2024-04-14 Hongwei Huang, Chen Wu, Mingliang Zhou, Jiayao Chen, Tianze Han, Le Zhang
Rock mass quality serves as a vital index for predicting the stability and safety status of rock tunnel faces. In tunneling practice, the rock mass quality is often assessed via a combination of qualitative and quantitative parameters. However, due to the harsh on-site construction conditions, it is rather difficult to obtain some of the evaluation parameters which are essential for the rock mass quality
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Energy mechanism of bolt supporting effect to fissured rock under static and dynamic loads in deep coal mines Int. J. Min. Sci. Technol. (IF 11.7) Pub Date : 2024-04-13 Deyuan Fan, Xuesheng Liu, Yunliang Tan, Xuebin Li, Shenglong Yang
The stability control of fissured rock is difficult, especially under static and dynamic loads in deep coal mines. In this paper, the dynamic mechanical properties, strain rate evolution and energy dissipation of fissured and anchored rocks were respectively obtained by SHPB tests. It was found that bolt can provide supporting efficiency-improving effect for fissured rock against dynamic disturbance
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An extended micromechanical-based plastic damage model for understanding water effects on quasi-brittle rocks Int. J. Min. Sci. Technol. (IF 11.7) Pub Date : 2024-04-11 Qiaojuan Yu, Shigui Du, Qizhi Zhu, Zhanyou Luo, Sili Liu, Lunyang Zhao
Water effects on the mechanical properties of rocks have been extensively investigated through experiments and numerical models. However, few studies have established a comprehensive link between the microscopic mechanisms of water-related micro-crack and the constitutive behaviors of rocks. In this work, we shall propose an extended micromechanical-based plastic damage model for understanding weakening
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Experimental investigation on coal pore-fracture variation and fractal characteristics synergistically affected by solvents for improving clean gas extraction Int. J. Min. Sci. Technol. (IF 11.7) Pub Date : 2024-04-11 Feilin Han, Sheng Xue, Chunshan Zheng, Zhongwei Chen, Guofu Li, Bingyou Jiang
Chemical solvents instead of pure water being as hydraulic fracturing fluid could effectively increase permeability and improve clean methane extraction efficiency. However, pore-fracture variation features of lean coal synergistically affected by solvents have not been fully understood. Ultrasonic testing, nuclear magnetic resonance analysis, liquid phase mass spectrometry was adopted to comprehensively
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Mechanical behavior and failure mechanisms of rock bolts subjected to static-dynamic loads Int. J. Min. Sci. Technol. (IF 11.7) Pub Date : 2024-04-10 Hongpu Kang, Guiyang Yuan, Linpo Si, Fuqiang Gao, Jinfu Lou, Jinghe Yang, Shuangyong Dong
This study explores the effects of dynamic and static loading on rock bolt performance a key factor in maintaining the structural safety of coal mine roadways susceptible to coal bursts. Employing a house-made load frame to simulate various failure scenarios, pretension-impact-pull tests on rock bolts were conducted to scrutinize their dynamic responses under varied static load conditions and their
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Development of multi-functional anchorage support dynamic-static coupling performance test system and its application Int. J. Min. Sci. Technol. (IF 11.7) Pub Date : 2024-04-10 Qi Wang, Shuo Xu, Bei Jiang, Chong Zhang, Zhe Sun, Jingxuan Liu, Cailin Jiao
In underground engineering with complex conditions, the bolt (cable) anchorage support system is in an environment where static and dynamic stresses coexist, under the action of geological conditions such as high stresses and strong disturbances and construction conditions such as the application of high prestress. It is essential to study the support components performance under dynamic-static coupling
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A robust triaxial localization method of AE source using refraction path Int. J. Min. Sci. Technol. (IF 11.7) Pub Date : 2024-04-06 Yichao Rui, Jie Chen, Jiongkun Chen, Jiadong Qiu, Zilong Zhou, Wenzhong Wang, Jinyang Fan
Acoustic emission (AE) localization algorithms based on homogeneous media or single-velocity are less accurate when applied to the triaxial localization experiments. To the end, a robust triaxial localization method of AE source using refraction path is proposed. Firstly, the control equation of the refraction path is established according to the sensor coordinates and arrival times. Secondly, considering
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Nonlinear empirical failure criterion for rocks under triaxial compression Int. J. Min. Sci. Technol. (IF 11.7) Pub Date : 2024-04-06 Hongtao Liu, Zhou Han, Zijun Han, Zihan Chen, Qinyu Liu, Hongkai Zhang, Rongguang Zhang, Linfeng Guo
Based on existing triaxial compression experimental data, a new empirical failure criterion with wide applicability was proposed considering hydrostatic pressure, second stress invariance, and maximum shear stress. Four fitting evaluation indicators were used to verify the consistency of the new failure criterion, and the differences with the other 6 failure criteria were discussed. The characteristics
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A novel nano-grade organosilicon polymer: Improving airtightness of compressed air energy storage in hard rock formations Int. J. Min. Sci. Technol. (IF 11.7) Pub Date : 2024-03-22 Zhuyan Zheng, Guibin Wang, Chunhe Yang, Hongling Ma, Liming Yin, Youqiang Liao, Kai Zhao, Zhen Zeng, Hang Li, Yue Han
Enhancing cavern sealing is crucial for improving the efficiency of compressed air energy storage (CAES) in hard rock formations. This study introduced a novel approach using a nano-grade organosilicon polymer (NOSP) as a sealant, coupled with an air seepage evaluation model that incorporates Knudsen diffusion. Moreover, the initial coating application methods were outlined, and the advantages of using
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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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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 11.7) 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