综放工作面开切巷锚梁网支护技术研究

The Technology of Roof Bolting with Bar and Wire Mesh in Open-off Cut in Coal Face with Sublevel Caving

义马耿村煤矿综放工作面开采易自燃煤层,采用开切巷沿煤层顶板布置.为此首先对开切巷锚梁网支护的设计和施工有关问题进行了研究,然后对巷道顶板围岩进行了深基点位移观测,同时利用超声波技术对巷道两帮进行了松动圈测定,在此基础上讨论了大断面巷道锚杆与围岩之间相互作用关系,最后说明了锚梁网支护效果.本研究成果对大断面巷道锚梁网支护具有一定的参考价值.

Spontaneous combustion coal seam of Gengcun Coal Mine, Yima Coal Group, has been excavated with fully mechanized coal face with sublevel caving whose open-off cut was driven along thick coal seam roof. Firstly, the authors studied on designing and construction roof bolting with bar and mesh, observed displacement of surrounding rock of deep roof, and determined broken zone of two-side in open-off cut with supersonic wave technology. Then, the relationship between bolts and surrounding rock of large-section open-off cut has been discussed. Finally, the effect of roof bolting with bar and mesh has been illuminated. The conclusions have a definite reference on bolting with bar and mesh in large-section open-off cut.