There is a problem of surrounding rock instability in the transportation gateway excavation area of 8059 working face of a coal mine in Shanxi Province.Numerical simulation shows that after 40 d of excavation,the overall collapse of the roadway occurs,and a fractured zone of surrounding rock is formed around the F16 fault,with a vertical distance of 30 m.In the area affected by the fault,advance grouting reinforcement measures were taken to condense the broken surrounding rock in advance,and then the effect of the treatment area was investigated.The inspection results indicate that the maximum displacement of the regional roof is 59 mm,and the deformation is relatively small.The grouting measures effectively solved the problem of instability of the surrounding rock in the area.
关键词
围岩失稳/数值模拟/超前注浆/效果考察
Key words
surrounding rock instability/numerical simulation/advance grouting/effect investigation
维普
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