瞬变电磁法在窄煤柱护巷掘进期间的应用

Application of Transient Electromagnetic Method in Roadway-protection Narrow Coal Pillar Driving

为解决石泉矿回采期间顶板压力控制问题,提高回采率,以30108轨道运输巷作为窄煤柱护巷掘进试验段,试验掘进期间遇到小煤柱顶板局部变形来压,相邻30102工作面采空区大面积积水以及瓦斯等有毒有害气体等情况。为保障掘进安全,从防治水角度,利用瞬变电磁仪对低阻体尤其是大面积积水的敏感特性,对30102工作面采空区进行连续、有效、全空域探测,为掘进期间探放老空水提供合理指导,并通过连续观测钻探放水,对瞬变电磁法的使用情况进行验证,为30102工作面采空区积水探放提供依据。

To solve the roof pressure control during coal wining and increase the rate of coal wining,30108 track roadway is chosen as a test section of narrow coal pillar driving in Shiquan Mine.During the test driving,it has encountered the local deformation of the small coal pillar roof,large area of water,gas,and other toxic and harmful gases in the adjacent 30102 working face goaf.To ensure the driving safety,in this paper,from the view of water prevention and control,using the sensitive characteristics of TEM to low resistance body,especially large area of water accumulation,the continuous,effective and full space exploration of the goaf of 30102 working face was carried out during the excavation,which provides reasonable guidance for the exploration and drainage of old goaf during the excavation,and through the continuous observation of drilling and drainage,the use of TEM was verified for the mining,which has provided basis for water exploration and drainage in the goaf of 30102 working face.