School of Energy and Mining Engineering, China University of Mining and Technology-Beijing
School of Mine Safety, North China Institute of Science and Technology
Water Resource Protection and Utilization in Coal Mining

地下水库技术是提高西部水资源利用率、缓解矿区用水紧张的有效方案,合理的地下水库煤柱宽度是地下水库的正常运行的重要保障。为了研究地下水库煤柱坝体的主要影响因素,以大柳塔矿地下水库为工程背景,对水库煤柱坝体的合理留设宽度进行了理论计算,并从采动应力与初始地应力两者综合作用的角度确定了煤柱坝体稳定性的主要影响因素,并分析了不同因素对煤柱坝体稳定性的影响。结果表明:大柳塔矿地下水库煤柱坝体的合理宽度为27.01m;工作面采高越大,煤柱宽度越小,则煤柱内的偏应力水平越高,煤柱稳定性降低;初始地应力场的侧压系数越小,地应力角度偏离0°的范围越大,煤柱内的偏应力水平越高,煤柱稳定性越低。

The underground reservoir technology system is a technical method to improve the utilization rate of water resources in the western region and alleviate the water shortage in mining areas. A reasonable coal pillar width of the underground reservoir is an important guarantee for the normal operation of the underground reservoir. In order to study the main influencing factors on the coal pillar dam body of underground reservoirs, taking the underground reservoir of Daliuta Coal Mine as the engineering background, we theoretically calculate the reasonable reserved width of the coal pillar dam body of the reservoir, put forward the main influencing factors of the stability of the coal pillar dam body from the perspective of the combined action of mining stress and initial crustal stress, and analyze the influence of different influencing factors on the stability of the coal pillar dam body. The results indicate that: the reasonable width of the coal pillar dam body in the underground reservoir of Daliuta Mine is 27. 01 m; the higher the mining height of the working face, the smaller the width of the coal pillar, the higher the level of deviatoric stress inside the coal pillar, and the lower the stability of the coal pillar; the smaller the lateral pressure coefficient of the initial crustal stress field, the larger the range of crustal stress angle deviation from 0°, the higher the deviant stress level in the coal pillar, and the lower the stability of the coal pillar.

煤炭开采水资源保护与利用国家重点实验室2018年开放基金课题资助(GJNY-18-73.6)

陈子晗, 赵希栋, 韩 洲, 等. 地下水库煤柱坝体尺寸设计与稳定性因素分析 [J].煤炭工程, 2023, 55(11): 38-44.