近距煤层采空区下巷道高强高预紧力锚网支护技术

Bolting with Wire Mesh Supporting Technique of Highstrength and Pretightening Force for Coal Roadway Under Close-distance Seams′ Goaf

以平煤集团一矿戊9,10-31020综采面的地质条件为基础,运用计算机数值模拟系统,分析了顶板破碎的原因和程度;根据锚杆作用模型,提出了高强高预紧力锚杆控制围岩的技术方案,确定了锚网支护参数。该方案工程实施效果达到了预期目标,经济效益明显,可在类似工作面推广应用。

This article analyzed the reason and extent of roof crack on the basis of geologic condition of wu9.10-31020 fully mechanized face in Nol mine of Pingdingshan Coal Group by computer numerical simulation system ,put up a technical project of control surround- ing rock by high-strength and pretightening force blot,determined parameters of bolting with wire mesh. The project achieved expectant goal. Because of the evident economic benefits, it could be applied widely in analogous mechanized face.