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Author(s): |
Shao-wei Liu, School of Energy Science and Engineering ,Henan Polytechnic University ,Jiaozuo,china
Shi-ju Dong, School of Energy Science and Engineering ,Henan Polytechnic University ,Jiaozuo,china
Xin-wang Zheng, School of Energy Science and Engineering ,Henan Polytechnic University ,Jiaozuo,china
Wei-guang Zhang, School of Energy Science and Engineering ,Henan Polytechnic University ,Jiaozuo,china |
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Abstract: |
Due to the direct roof structured by sandy mudstone and the direct floor structured by carbonmudstone in three closed slant roadways in one coal mine, the intensity of direct roof and floor is poor whichis acted as the extreme instable steam. The extreme instable steam has brought heavy effects on safe constructionand normal utilization in roadway. Mechanism of the bolting and bolt-grouting support wall-rockhas been analyzed further by the distinct element method. Comparing bolting support with bolt-groutingsupport by numerical simulation UDEC, all mechanical, displacement and damage character of the wall-rockhave been put forward. In the end, the influence of stability on the slant wall-rock from bolting support andbolt-grouting reinforcement has been indicated. The article utilizes the discrete element method conferringadjacent rock action mechanism of the bolting and anchor-injected support, and proceeds numerical simulationto this two types of support method by using the discrete element software UDEC, and then deeply researchesmechanical character, displacement character, and damage character of the dip heads adjacent rockafter 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 itprovides a reference basis for suitable support of the dip heads adjacent rock.
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