基于松动圈理论的巷道拓宽支护设计及应用

Support Design and Application on Roadway Broadening Based on Broken Rock Zone Theory

以晋华宫矿3#煤层综采旅游工作面为研究对象,采用钻孔摄像法对原3#煤层集中皮带巷的围岩松动圈厚度进行了实测研究,在此基础上,利用松动圈支护理论对巷道拓宽后不同部位进行"差异设计":顶板锚网支护,左帮锚注加固,右帮无支护,并对巷道表面位移进行监测。结果表明:巷道拓宽15天后保持稳定,顶板下沉量12.1 mm,左帮表面位移9.3 mm,右帮位移14.2 mm,没有明显的底鼓,满足了探秘游工程的要求。

Takes fully mechanized mining face for tourism in layer 3# of Jinhuagong coal mine as the research object, by using borehole camera method,the broken rock zone thickness of surrounding rock in original 3# coal seam of concentrated belt roadway is measured and researched. On this basis, by using broken rock zone supporting theory, carries out ＂differences design＂ on the different parts after the roadway broadening, namely the roof used bolting with wire mesh supporting, the left side used bolting and grouting reinforcement, the right side is unsupported, and the roadway surface displacement is monitored. The results show that after roadway broaden 15 days reach steady state, roof subsidence is 12.1 ram, surface displacement of left side is 9.3 mm, displacement of right side is l4.2 mm, heaving floor is not obvious and meets the requirements of questing tour engineering.