Experimental Study on the Mud-Water Inrush Characteristics through Rock Fractures by YanLin Zhao, LianYang Zhang

Get full text

Distribution and Variation of Mining-Induced Stress in the Reverse Fault-Affected Coal Body by Rui Zhou, Yujin Qin, Zhizhen Zhang

“…Finally, intrinsically safe GZY25 borehole stress sensors were used to monitor the coal body stresses in the reverse fault area under the influence of mining in Xinchun Coal Mine and ZuoQiuka Coal Mine. It was found that the coal body stress concentration in front of the working face either increased gradually or increased first before decreasing. …”
Get full text

A key technology for synergistic backfilling of coal-based solid waste and high-salinity wastewater by Shuning DONG, Shujiang YU, Xingling DONG, Buqin ZHANG, Xiaoming GUO, Xiaodong WANG, Kai WANG, Shibin ZHU, Boqiang WU, Lei LIU

“…Specifically, high-salinity water, rather than ordinary water and additives such as early strength agent, and solid waste cementitious materials—used to replacing part of cement, were mixed while stirring to produce filling paste, which was then pumped to the underground goaves of coal mines. To analyze the feasibility of this technology, this study investigated the mechanical properties and potential environmental impacts of filling paste prepared using coal-based solid waste and high-salinity wastewater from a certain coal mine in the Ningdong coal base in Ningxia. …”
Get full text

Analysis and Experimental Study on Pressure Characteristics of Supporting Roller Group of Pipe Belt Conveyor by Shuang Wang, Deyong Li, Kun Hu

Get full text

Research on Stress Distribution Characteristics for Uniquely Shaped Roadway with Hard Roof in Steeply Inclined Coal Seam and Support Technology of Reducing Vibration Impact by Junhui Zhang, Hui Chen, Xiuzhi Shi, Weiming Guan, Xiaolong Sun

“…The large amount of coal produced in the coal mine and the large movement range of the upper strata cause the huge mining additional stress around the stope. …”
Get full text

Failure Mechanism of Gob-Side Roadway under Overlying Coal Pillar Multiseam Mining by Hongwei Mu, Anhu Wang, Dazhao Song, Dongfang Su, Donghui Li

“…Roadway deformation and rock burst are the two key challenges faced by the safe operation of coal mines. Aiming at the issue of large deformation of the gob-side roadway under coal pillars in multiseam mining, this study has considered the case of the 8308 panel of Xinzhouyao coal mine in China. …”
Get full text

Physical Simulation of the Water-Conducting Fracture Zone of Weak Roofs in Shallow Seam Mining Based on a Self-Designed Hydromechanical Coupling Experiment System by Hao Zha, Weiqun Liu, Qinghong Liu

“…The simulated fracture depth of the Yili coal mine agreed with the in situ borehole observation very well and was more accurate than the output of the empirical formula. …”
Get full text

Deformation Monitoring and Stability Analysis of Shaft Lining in Weakly Cemented Stratum by Xianzhou Lyu, Weiming Wang

“…Based on the concrete strength failure criterion under biaxial compression and the analytical solution for spatially axisymmetric problem of thick-wall cylinders, the damage limit of the shaft lining in Xieqiao coal mine is obtained. Then, we choose three sections as the test area according to the typical damage forms of shaft linings to carry out the monitoring scheme on the auxiliary shaft in Xieqiao coal mine. …”
Get full text

Experimental Study on Flow Characteristics of Aeolian Sand in Fractures by Jiarui Chen, Wenhu Gu, Jihua Zhang, Jitao Tang, Zhengzheng Cao, Jingke Wu, Jianxiong Liu, Weizhong He, Fang Shi

“…This study can provide a theoretical basis and scientific guidance for the prevention and control of coal mine sand inrush disasters caused by roof cracking in western coal mines.…”
Get full text

Roof Fracture Characteristics and Strata Behavior Law of Super Large Mining Working Faces by Guozhen Zhao, Baisheng Zhang, Lihong Zhang, Chao Liu, Shuai Wang

“…Exploiting the working face in coal mines using a super long mining length and large mining height has become important for intensive production with high yield and high efficiency. …”
Get full text

Improvement on the Key Element of Flexible U-Shaped Steel Support and Its Field Applications by Zhili Su, Shengguo Jing, Wenbing Xie, Qingteng Tang, Xingkai Wang

“…In China, there are a significant numbers of soft rocks roadways in underground coal mines. The roofs of these roadways are generally highly fractured, and traditional bolt installation does not provide sufficient supporting capacity. …”
Get full text

A Method Based on Elastic Mechanics for Judging Compound Hard Roof and Its Application by Haiyang Wang, Xiang Chen, Yanmin Zhou, Binwei Xia, Jie Wang, Shulei Zhao, Jialiang Liu

“…In this essay, 8101 Working Face of Tashan Coal Mine in China is the research object for criteria and analysis of compound hard roof, and the result is testified by similar model tests. …”
Get full text

Mechanical and Dynamic Properties of Hybrid Fiber Reinforced Fly-Ash Concrete by Dan-Yang Su, Jian-Yong Pang, Xiao-Wen Huang

Get full text

Experimental Study on Dynamic Compression Mechanics of Sandstone after Coupled Alkali-Chemical-Dynamic Interaction by Qi Ping, Chen Wang, Qi Gao, Kaifan Shen, Yulin Wu, Shuo Wang, Xiangyang Li

“…For the purpose of analyzing the effect of the alkaline solutions on the mechanical property of sandstone impact compression, the sandstone specimens of coal mine roadway were corroded in NaOH solution with pH 7 (neutral pure water solution) and pH = 8, 9, 10, 11, and 12 for 28 d, followed by dynamic compression tests using a separated Hopkinson compression bar test device, and the microstructural changes of the specimens were measured by SEM electron microscope scanning equipment. …”
Get full text

Similar Simulation Test on Deformation Characteristics of Overlying Rock Developed by Instability of Strip Coal Pillar by Yong Liu, Bing Chen, Shilei Cui, Dawei Yin

Get full text

Prediction Model for Spontaneous Combustion of Coal around Boreholes Using Bedding Gas Drainage by Youxin Zhao, Qingjie Qi, Xinlei Jia

“…To accurately and reliably predict the time of spontaneous combustion of fractured coal around a borehole induced by gas drainage along the seam, this study performed an orthogonal test taking the No. 10 Coal Mine of Pingdingshan as the research object, in terms of the suction negative pressure and coal seam buried depth. …”
Get full text

Coal Seam Gas Extraction by Integrated Drillings and Punchings from the Floor Roadway considering Hydraulic-Mechanical Coupling Effect by Chaojun Fan, Haiou Wen, Sheng Li, Gang Bai, Lijun Zhou

“…Owing to the exhaustion of shallow coal resources, deep mining has been occupied in coal mines. Deep buried coal seams are featured by the great ground stress, high gas pressure, and low permeability, which boost the risk of gas disasters and thus dramatically threaten the security about coal mines. …”
Get full text

A Method and Engineering Practice for a Fully Mechanized Caving Coalface to Rapidly Pass Through a Large Fault by Wei Zhang, Feili Yang, Jingyu Chang, Shengxun Zhao, Bin Xu, Jinyong Xiang

“…One of the technical problems that must be solved in coal mine production is when the coalface rapidly crosses the fault. …”
Get full text

Numerical Analysis of the Width Design of a Protective Pillar in High-Stress Roadway: A Case Study by FuZhou Qi, ZhanGuo Ma, Ning Li, Bin Li, Zhiliu Wang, WeiXia Ma

“…The novel numerical modeling approach and design principle of protective pillars presented in this paper can provide useful references for application in similar coal mines.…”
Get full text

Failure Analysis of Deep Composite Roof Roadway and Support Optimization of Anchor Cable Parameters by Chen Li, Wenlong Zhang, Tianhong Huo, Rui Yu, Xidong Zhao, Ming Luo

“…Roof subsidence occurred during roadway excavation in the Menkeqing Coal Mine. For the sake of safety, it was decided to stop tunneling project and strengthen roadway support, which resulted in a delay of the construction period and economic damage. …”
Get full text