期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：252
期号：5
页码：1-8
DOI：10.1088/1755-1315/252/5/052082
出版社：IOP Publishing
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.
