慈林山煤矿近距离采空区下巷道围岩控制技术研究
Study on the Control Technology of the Surrounding Rock of the Roadway Under the Close Mining Area in Cilinshan Coal Mine
孙云玲1
作者信息
- 1. 山西潞安矿业集团慈林山煤业有限公司慈林山煤矿,山西 长子 046605
- 折叠
摘要
针对慈林山煤矿9107工作面近距离采空区下回采巷道稳定性较差、顶板易冒落等问题,结合9107工作面的工程地质条件,采用数值模拟的方法,确定了8号煤层和9号煤层近距离采空区回采巷道内错10～20 m的合理距离.现场监测结果表明,巷道围岩变形在10d后趋于稳定,顶板最大沉降量约为88 mm,底板最大底鼓量约为23 mm,两帮最大移近量为185 mm,围岩稳定性得到有效控制.
Abstract
Aiming at the problems of poor stability of the return roadway under the near mining area of 9107 working face of Cilinshan coal mine,the top plate is easy to fall,etc.,combined with the engineering geological conditions of 9107 working face,the method of numerical simulation was used to determine a reasonable distance of 10～20 m for the inner error of the return roadway in the near mining area of 8#coal seam and 9# coal seam,the results of field monitoring can be obtained,the deformation of the surrounding rock of the roadway tends to be stable after 10 d.The maximum settlement of the top plate is about 88 mm,the maximum bottom drum of the bottom plate is about 23 mm,the maximum displacement of the two gangs is 185 mm,and the stability of the surrounding rock is effectively controlled.
关键词
近距离采空区/围岩控制/内错距离Key words
proximity mining area/surrounding rock control/internal error distance引用本文复制引用
出版年
2024
NETL
NSTL
万方数据