近距离煤层群集中大巷过煤柱支护技术研究

Research on Supporting Technology of Roadway under Close Distance Seam Crossing Coal Pillar

针对大同煤矿集团有限责任公司忻州窑矿14_(-2)~#集中轨道巷掘进过程中过上分层采空区隔离煤柱矿压显现剧烈,采用数值模拟软件,系统的分析并给出了新的巷道支护参数和支护方法,其次,基于新的支护参数和方法,研究了进、出煤柱巷道围岩的应力分布规律和破坏规律,最后通过工程实践进行验证,实现了14_(-2)~#集中轨道巷安全支护,为类似条件下巷道支护提供了依据和参考。

According to the firece underground pressure during tunneling 14_2^# roadway which is under goaf isolated coal pillar in Xinzhouyao coal mine of Datong coal mine group Co., Ltd. ,the numerical simulation and systematic analysis were applied to abtain the new supporting parameters and methods. Futher more,there is a research on stress distribution and damage laws of roadway surrounding rock based on the new supporting parameters and methods when crossing coal pillars. The research result was validated in the engineering practice,achieving safety support of 14-2^# roadway and providing the basis and reference for roadway support under similar conditions.