Research on Stress Distribution and Safe Mining of Lower Layer Working Face Based on Resource Integration

2018 4th International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Yang, Fengfeng^1 ; Bai, Liping^2 ; Su, Ruiqing^1 ; Chen, Jing^1 ; Zhang, Jufeng^1 ; Zheng, Chao^1 ; Xu, Tai^1 ; Zhu, Xiulan^1 ; Su, Weiwei^3

School of Energy Engineering, Long Dong University, Qingyang

745000, China^1

Gansu Energy Qingyang Coal and Electricity Corporation Ltd., Qingyang

745000, China^2

China Coal Technology and Engineering Group Shenyang Research Institute, Liao ning

113122, China^3

关键词: Coal recovery rate;    Gas concentration;    Green mining;    Hydraulic support;    On-site measurement;    Resource integration;    Utilization rates;    Working face;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/252/5/052082/pdf
DOI  :  10.1088/1755-1315/252/5/052082

来源: IOP

【 摘 要 】

The use of small face mining mode in the upper stratification of Qudi Coal Mine leads to the imbalance of mining succession, in order to improve coal recovery rate and utilization rate, solve the problem of over-limit gas overrun, in the context of resource integration, combine two adjacent working face goafs into one large working face, ensure safe and efficient recovery of the remaining 24m coal pillar, through numerical simulation and on-site measurement, the variation law of stress in lower layer is studied. The results show: ZYP3200/17/28 hydraulic support can fully meet the roof support. Residual gas content and the gas-concentration in air-return laneway indicate that the 31012 mining face has eliminated the outstanding danger, safe, efficient and green mining has been realized.