Deformations and seepage-induced erosion of fractured rocks in fault under confined settings by Wenbin SUN, Dianjin TIAN, Cheng MA, Yanchao XUE, Can YANG, Kaipeng ZHU

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The Research of the Influence on Stress below the Roadway Floor of the Coal Seam Becoming Thin by Liang Chen, Qi Liu

“…Stress is the important factor of dynamic disaster in the coal mine. Stress is closely related with surrounding geological conditions. …”
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Mechanism of Coal Seam Permeability Enhancement and Gas Outburst Prevention under Hydraulic Fracturing Technology by Xinhua Wu, Tao Zhu, Yufei Liu, Guoyu Zhang, Guanghui Zheng, Fengnian Wang

“…In view of the high gas pressure and low permeability of deep coal seam, it is difficult to control gas, which affects the safety production of coal mine. The technical scheme of hydraulic fracturing to improve the permeability of coal seam is put forward, and the gas drainage technology is used to control the gas emission of coal seam. …”
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Zonal Disintegration Mechanism of Deep Rock Masses under Coupled High Axial Geostress and Blasting Load by Pu Yuan, Ying Xu

“…Taking the deep tunnel of Dingji coal mine in China as engineering background, the number and width of fracture zones are determined by deduced elastic stress field and modified Hoek-Brown criterion. …”
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Presplit Blasting Technique in Treating Hard Overlying Strata: From Numerical Simulation to Field Practice by Baisheng Zhang, Zhiping Yang, Xuming Yang, Shuai Zhang

“…Then, the field practice in accordance with the determined parameters was carried out in Yuwu coal mine. The effectiveness of the presplit blasting technique was well verified when the microstructures of the surrounding rock were investigated. …”
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A Static Fracturing Technology to Enhance the Permeability of Coalbed: Mechanical Study by Long Wang, Baohua Guo, Zhaofeng Wang

“…Low permeability of coalbed has always been a main bottleneck impeding the safety production of coal mines and the high-efficient gas recovery. A static fracturing technology, relied on hydraulic-driving modules to expand outwards for producing artificial fissures in coalbed, is proposed here for coalbed reservoir stimulation. …”
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Study on Monitoring Rock Burst through Drill Pipe Torque by Zhonghua Li, Liyuan Zhu, Wanlei Yin, Yanfang Song

“…The results are important for the forecast of rock burst in coal mine.…”
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Study on Seepage Simulation of High Pressure Grouting in Microfractured Rock Mass by Kai Wang, Lianguo Wang, Bo Ren, Hao Fan

“…In coal mines, under high in situ stress and strong mining activity, roadway surrounding rock commonly contains large amounts of larger fractures and microfractures. …”
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The Stability Analysis of Roadway near Faults under Complex High Stress by Biao Zhang, Huaqiang Zhou, Qingliang Chang, Xu Zhao, Yuantian Sun

“…Based on geological conditions of 3318 working face haulage roadway in Xuchang Coal Mine, as well as the space-time relationship with surrounding gob, theoretical analysis and numerical simulation were used to study the influence of fault structure on the original rock stress of 3318 working face transport roadway. …”
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Experimental Study on Influence of Borehole Arrangement on Energy Conversion and Acoustic Characteristics of Coal-Like Material Sample by Chuanbo Hao, Zhiyuan Hou, Fukun Xiao, Gang Liu

“…The results of this study have certain guiding significance for the layout of pressure relief boreholes in the production process of coal mines.…”
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Calculation Method of Overburden Damage Height Based on Fracture Mechanics Analysis of Soft and Hard Rock Layers by Liang Chen, Shaowu Fan, Can Zhao, Lang Zhang, Zhiheng Cheng

“…This research took Yuwu coal mine in Lu’an mining area as an example. Results showed that (1) by the calculation method, the overburden damage height of the N1102 fully mechanized caving face in Yuwu coal mine was 51.44 m, which was less than the value obtained by an actual borehole TV method as well as the numerical simulation result of 53.46 m, with a calculation accuracy about 96.22%, which is quite high for both. …”
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Prediction of Blasting Fragmentation Based on GWO-ELM by Zhengzhao Jia, Ziling Song, Junfu Fan, Juyu Jiang

“…Taking No. 2 open-pit coal mine of Dananhu as an example, seven factors including the rock tensile strength, compressive strength, hole spacing, row spacing, minimum resistance line, super depth, and specific charge are selected as the input factors of the prediction model. …”
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Mechanism and Procedure of Repeated Borehole Drilling Using Wall Protection and a Soft Structure to Prevent Rockburst: A Case Study by Yongliang He, Mingshi Gao, Xu Dong, Xin Yu

“…With the increasing mining depth of coal mines, the occurrence of rockburst, especially in mine roadways, is becoming critical as a severe dynamic disaster. …”
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Analytical and Numerical Study of the Ground Pressure of the Work Face Crossing the Fault by Yanan Gao, Yudong Zhang, Donghao Lan, Feng Gao

“…The excavation of coal mine often encounters the fault problem. In this paper, the analytical study of the pressure of the fault that the work face may cross is carried out. …”
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Mechanism of Support Optimization and Confined Blasting of Thick and Hard Rock with a Wedge-Structure Immediate Roof: A Case Study by Tong Zhao, Peilin Gong, Kaan Yetilmezsoy, Majid Bahramian, Changyou Liu, Xiaofei Gong

“…Based on the occurrence conditions of a thick and hard main roof and wedge-structure immediate roof in the Zhuxianzhuang Coal Mine, the fracture characteristics and instability migration law of a thick and hard roof (THR) were examined via physical simulations. …”
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An Elastoplastic Softening Damage Model for Hydraulic Fracturing in Soft Coal Seams by Yang Hao, Yu Wu, Xianbiao Mao, Pan Li, Liqiang Zhang, Jing Tao

“…The model then was implemented to FLAC3D finite difference software to be verified with the on-site results of the Number 2709 coalface in Datong coal mine, China. The modelling results of fracture-influenced radius show good consistency with on-site results. …”
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Effect of Seepage Velocity on Formation of Shaft Frozen Wall in Loose Aquifer by Jian Lin, Hua Cheng, Hai-bing Cai, Bin Tang, Guang-yong Cao

“…This paper addresses the difficult closure of a frozen wall in a coal mine shaft due to excessive seepage velocity in an aquifer when the aquifer is penetrated via the artificial freezing method. …”
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Experimental Investigation of Coal Dust Wettability Based on Surface Contact Angle by Gang Zhou, Han Qiu, Qi Zhang, Mao Xu, Jiayuan Wang, Gang Wang

“…In this paper, the theory of liquid wetting solid was presented firstly; then, taking the gas coal of Xinglongzhuang coal mine in China as an example, by determination of critical surface tension of coal piece, it can be concluded that only when the surface tension of surfactant solution is less than 45 mN/m can the coal sample be fully wetted. …”
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Mechanism of microscopic behind the influence of stress loading on gas adsorption by coal by Zhihui Wen, Shuqian Guo, Yanxia Zhao, Yanping Wang, Ran Jia, Jiangang Ren

“…The research findings are anticipated to offer theoretical and practical guidance for the prevention and control of gas disasters in deep coal mines and the extraction of coalbed methane.…”
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Analysis of Strata Behavior Process Characteristics of Gob-Side Entry Retaining with Roof Cutting and Pressure Releasing Based on Composite Roof Structure by Manchao He, Xingen Ma, Bin Yu

“…Besides, taking the 8304 working face of Tashan Coal Mine as an example, the results of theoretical research are verified by field-monitoring data of hydraulic supports, working resistance, and roadway deformation. …”
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