停采线顶板预裂抑制采区巷道变形的研究和实践

Research and practice of roadway deformation of mining line roof pre-cracking

为了抑制工作面采动影响,消除采区巷道采后变形过大,维护巷道的稳定性,通过分析巷道布置形式,工作面超前支撑压力分布规律,提出了通过切顶卸压技术来阻断超前支撑压力的传递路径,达到保护采区巷道的目的。介绍了切顶留巷技术的施工关键,并且对施工效果进行了分析,提出了切顶卸压对保护巷道的作用,以及在采用该技术应该注意的关键性问题。

In order to control the influence of working face mining,eliminate the excessive post-mining deformation of the mining area and maintain the stability of the alleyway,by analyzing the arrangement of the roadway and the distribution law of the advanced support pressure of the working face,it was proposed to block the transmission path of the advanced support pressure by cutting the top pressure relief technology to achieve the purpose of protecting the roadway of the mining area.The key to the construction of the top-retention alley technology was introduced,the construction effect was analyzed,and the role of top-retention pressure relief in protecting the alleyway was proposed,as well as the key issues noted of the technology.