Experimental Research on Performance of New Gas Drainage Borehole Sealing Material with High Fluidity by Xin Guo, Sheng Xue, Chunshan Zheng, Yaobin Li

“…To ensure the sealing effect of gas extraction borehole in underground coal mine and improve the concentration of gas extraction, a kind of high-flow sealing material which can be injected into the microcracks around borehole was developed. …”
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Stability Mechanism and Control Factors on Equipment Removal Area under “Goaf-Roof-Coal” Structure by Zhongshun Chen, Yong Yuan, Cheng Zhu, Wenmiao Wang

“…In order to solve this problem, the stability mechanism and its control factors during the LM equipment removal were investigated by using comprehensive methods including theoretical analysis, numerical simulation, and field validation based on the working conditions of Panel 31102 in Liangshuijing Coal Mine. The numerical simulations demonstrate that four different failure zones, shear failure zone, tension failure zone, partly elastic zone, and plastic failure zone, appear around the area due to the position of rock and the arrangements of the supports. …”
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Cutting-Caving Ratio Optimization of Fully Mechanized Caving Mining with Large Mining Height of Extremely Thick Coal Seam by Kai Wang, Tong Zhao, Kaan Yetilmezsoy, Xiaoqiang Zhang

“…Engineering application showed that the optimal cutting height of Xiegou Coal Mine was 4 m, the cutting-caving ratio was 1 : 2.75, and the recovery rate could reach more than 85%, which was the most reasonable.…”
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Mechanical Behavior Evolution and Damage Characterization of Coal under Different Cyclic Engineering Loading by Huajun Wang, Jian Li

“…The cyclic loading causes the strength change of porous rocks, which can be frequently encountered in underground coal mining. In order to quantify the cumulative damage of porous coal, multilevel uniaxial cyclic compressive tests were carried out considering different loading frequencies. …”
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Prevention Technology for Strong Mine Pressure Disaster in the Hard-Roof Large-Mining-Height Working Face by Hongfei Duan, Lijuan Zhao

“…Considering Tongxin Coal Mine as the engineering background, the stress distribution law of the surrounding rock and the overburden rock damage characteristics of a large-mining-height working face under the hard roof were investigated. …”
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The Study of Key Stratum Location and Characteristics on the Mining of Extremely Thick Coal Seam under Goaf by Gaochuan Guo, Yongkang Yang

“…This method was used to determine the position of interlayer key stratum of overlying strata in Xiegou coal mine. And the results agree with that of the engineering practice. …”
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Discrete-Time Zhang Neural Networks for Time-Varying Nonlinear Optimization by Min Sun, Maoying Tian, Yiju Wang

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Risk Prediction Algorithm of Social Security Fund Operation Based on RBF Neural Network by Linxuan Yang

“…On this basis, the prediction model based on the improved ANT colony-RBF neural network is established, and the MATLAB software calculation tool is used for accurate calculation, which makes the prediction results of coal mine safety risk more accurate and provides more reliable decision basis for decision makers. …”
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Study on Acoustic Emission Characteristics and Damage Evolution Law of Shale under Uniaxial Compression by Wenjie Wu, Chee-Ming Chan, Yilei Gu, Xiaopeng Su

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Experimental Study on Mechanism of Graphene Oxide-Modified Coral Sand Cement Mortar to Resist Sulfate Erosion by Bin Chen, Jianlin Zhang, Yanlin Zhao, Yiwei Lu

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Numerical Simulation of Mechanical Characteristics of Roadway Surrounding Rock under Dynamic and Static Loading by Ce Jia, Sheng Li, Chaojun Fan, Jinbao Tang

“…In this study, the 2802 transportation roadway in Zhangcun Coal Mine is selected as the engineering background. …”
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Parameter Optimization of Constant Pressure Grouting Technology for Borehole Sealing with Inorganic Noncondensable Material in Tectonic Coalbed of South China by Zhao Pengtao, Wang Haiqiao, Wang Long, Wang Xinlei, Ma Hongyu

“…Adopting the constant pressure grouting technology with the slurry, the average drainage concentration of boreholes in Puxi coal mine is 51.5%, and the average gas flow rate is 0.005 m3/min, which are 1.35 times and 1.67 times than those with the cement grouting method.…”
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Risk Decision-Making Technology in Gas Reservoir Development at Sichuan Basin by Guo Yu, Haitao Li, Yanru Chen, Linqing Liu, Dongming Zhang

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Damage Characteristics Caused by Deep-Hole Blasting near Normal Fault and Its Effects on Coal and Gas Outbursts by Kui Gao, Guodong Qiao, Zegong Liu, Wei Xia

“…Based on cases of coal and gas outbursts in the Didaoshenghe Coal Mine in Heilongjiang Province, China, an important reason for such incidents is considered to be the blasting areas of normal faults being disturbed by air-powered coal drilling.…”
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Floor Disturbance and Failure Characteristics of Super-Large Mining Height Working Face by Cunjin Lu, Jinpeng Xu, Hui Zhao, Heng Zhang, Yian Zhang, Mingyue Chen

“…In this paper, the working face with a super-large mining height of 24 m in Longwanggou Coal Mine was studied. Electrical monitoring and numerical simulation of the working face floor were carried out. …”
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Spatial and Temporal Distribution Law and Influencing Factors of the Mining-Induced Deformation and Failure of Gas Boreholes by Fei Xue, Xiaowei Feng

“…Because gas boreholes are easy to damage by integrated coal mining and gas exploration, based on the practice of relieving pressure in deep thin coal seams in the Huainan mining area, a multidimensional coupling numerical simulation method was used to reveal the space-time evolution characteristics and influence factors of fracture deformation of gob-side gas boreholes. …”
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Development and Application of Fluid-Solid Coupling Similar Materials in Discharge Test of Old Goaf Water by Zhenhua Li, Mingxiao Ma, Yongsheng Bao

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Shear Behavior and Anisotropy Characteristics of the Fracture Morphology of Sandstone with Different Water Contents by Changang Du, Lulu Sun, Botao Qin, Jiang Xu, Yixin Liu

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Dynamic Analysis of the Scraper Conveyor under Abnormal Operating Conditions Based on the Vibration and Speed Characteristics by Shoubo Jiang, Weijian Ren, Qinghua Mao, Qingliang Zeng, Pengfei Yu, Kuidong Gao, Liang Wang

“…The scraper conveyor is the key coal transportation equipment on the coal mining face. The conveyor often encounters the influence of abnormal working conditions, such as stuck chains, broken chains, and impact loads, which have a great effect on the smooth operation of the scraper chain and seriously affect the safety of coal production. …”
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Evolution Law of Overburden Longitudinal Connected Fissures in a Shallowly Buried Coal Face with Thin Bedrock by Housheng Jia, Kun Pan, Luyao Wang, Shaowei Liu, Mengxiong Fu, Xiang Ji

“…To understand the evolution of longitudinal connected fissures and propose method for controlling such fissures, 3-1 Coal of the Jinjie Coal Mine in Shendong Coal Group, China, was used as a case study. …”
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