预裂切顶沿空留巷技术在红阳三矿的研究与应用

Research and Application of Pre-splitting Roof Cutting and Gob-side Entry Retaining Technology in Hongyang No.3 Mine

为了解决红阳三矿西三上采区703综采工作面运输顺槽沿空留巷支护技术难题,在充分分析巷道变形规律及锚杆、锚索锚固力拉拔测试、围岩破坏范围测试的基础上,提出了顶板预裂切缝设计方案及预裂爆破参数。经现场实践运用,取得了良好的效果。

In order to solve the support technical problem of gob-side entry retaining in the 703 fully mechanized mining face of the west third upper mining area of Hongyang No.3 Mine,on the basis of fully analyzing the roadway deformation law,the anchor force drawing test of anchor bolt and anchor cable,and the surrounding rock damage range test,the roof pre-splitting joint-cutting design scheme and pre-splitting blasting parameters are proposed,and good results are achieved through field practice and application.