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以山西某矿110403工作面运输平巷为研究对象,应用岩土工程有限元分析软件FLAC3D中的应变软化模型分析了层间距厚度与巷道围岩变形、围岩应力及围岩剪切破坏带的分布关系。通过对比分析:掘进随着层间距厚度的变薄,巷道顶板下沉量增大;巷道右帮位移始终大于左帮,但左帮的位移变化明显;掘巷后左侧煤体应力明显下降;同时采空区侧煤体剪切破坏带面积明显增加。从支护的角度考虑最应该加强顶板的支护,其次随着顶板厚度的不断变薄还应当加强左帮(采空区侧)的支护。
Taking the transport lane of 110403 working face of a mine in Shanxi Province as the research object, the application of the strain softening model in the geotechnical finite element analysis software FLAC3D to the analysis of the relationship between the thickness of the layer spacing and the deformation of surrounding rock, the stress of surrounding rock and the shear failure zone Distribution relationship. Through the comparative analysis, the tunnel subsidence increases with the thinning of the interlayer spacing. The displacement of the right tunnel is always greater than that of the left one, but the displacement of the left one is obviously changed. The stress of the left coal body obviously decreases after the tunneling. At the same time, the area of shearing and destruction zone of coal body in goaf obviously increases. From the support point of view, the support of the roof should be strengthened most, and the support of the left side (goaf side) should be strengthened with the continuous thinning of the roof.