Effect of anchor-injected support of the dip heads adjacent rock stability based on the distinct element

摘要

Due to the direct roof structured by sandy mudstone and the direct floor structured by carbon mudstone in three closed slant roadways in one coal mine, the intensity of direct roof and floor is poor which is acted as the extreme instable steam. The extreme instable steam has brought heavy effects on safe construction and normal utilization in roadway. Mechanism of the bolting and bolt-grouting support wall-rock has been analyzed further by the distinct element method. Comparing bolting support with bolt-grouting support by numerical simulation UDEC, all mechanical, displacement and damage character of the wall-rock have been put forward. In the end, the influence of stability on the slant wall-rock from bolting support and bolt-grouting reinforcement has been indicated. The article utilizes the discrete element method conferring adjacent rock action mechanism of the bolting and anchor-injected support, and proceeds numerical simulation to this two types of support method by using the discrete element software UDEC, and then deeply researches mechanical character, displacement character, and damage character of the dip heads adjacent rock after the bolting and anchor-injected reinforcement, after that it analyses the effect of bolting and anchor-injected support stability of influence the dip heads adjacent rock with the constrating method, thus it provides a reference basis for suitable support of the dip heads adjacent rock.