神东矿区回撤阶段调节巷适用的合理埋深研究

Rational buried depth for regulating roadway application during coal face withdrawal in Shendong mining area

针对神东矿区补连塔煤矿12401,12402工作面在回撤阶段调节巷易诱发工作面端面冒顶的问题,采用FLAC3D三维有限元软件就埋深对调节巷交叉点围岩稳定的影响进行了数值模拟研究。结果表明：基于煤体稳定时调节巷适用的极限埋深为213-318 m,基于围岩变形可控时调节巷适用的极限埋深为165-229 m,最终确定神东矿区调节巷适用的合理埋深应小于165 m。并得到了补连塔煤矿12405和12406、大柳塔煤矿52304和52303工作面的回采验证,为神东矿区类似条件下综采工作面的快速安全回撤提供参考。

In Bulianta coal mine of Shendong mining area, roof fall is tend to happen during the withdrawal of No.12401 and No.12402 coal faces, which is caused by the regulating roadway. To investigate this problem, FLAC3 D software was used to study the influence of buried depth on regulating roadway. The results show that the maximum buried depth for regulating roadway application is 213 m to 318 m when the coal pillar is stable, or 165 m to 229 m when the surrounding rock deformation is controllable. By considering other related factors, the final maximum buried depth for regulating roadway application is determined as less than 165 m. The findings have been verified by No.12405 and No.12406 coal faces of Bulianta coal mine, and No.52304 and No.52303 coal faces of Daliuta coal mine, which can provide reference to effective and safe withdrawal of coal faces with similar conditions in Shendong mining area.