燕子山煤矿沿空掘巷采空水综合防治技术研究

Study on comprehensive prevention and control technology of goaf water in roadway excavation along goaf in Yanzishan Mine

针对小煤柱临空侧巷道掘进期间容易发生水害事故的问题,以燕子山煤矿5208巷小煤柱沿空掘巷为工程背景,采用瞬变电磁法探查了相邻8210采空区积水特征,将其划分为3个主要积水区,并提出了“疏水钻孔放水+小煤柱注浆加固”的综合水害防治技术,保证了工作面的安全生产。

In view of the problem that water damage were prone to occur during the roadway excavation along goaf beside small coal pillars,taking the roadway excavation along goaf beside small coal pillars in No.5208 roadway of Yanzishan Mine as the engineering background,the transient electromagnetic method was used to explore the water accumulation characteristics of the adjacent No.8210 goaf,which was divided into three main water accumulation areas.And the comprehensive water damage prevention and control technology of“drainage of hydrophobic drilling holes+grouting reinforcement of small coal pillars”was proposed.The study ensured the safe production of the working face.