高应力软岩巷道支护失效机制及控制研究

doi:10.13722/j.cnki.jrme.2014.1594

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Abstract To find out the support failure mechanism of high stress soft rock roadway，Zhaolou coal mine is took as engineering background，and based on the detecting，monitoring and analysis of deformation and support failure law，the numerical experimental is carried out. By amending of BEAM element in FLAC3D，the arch support is simulated effectively. The influence of the support strength，stress grade and surrounding rock strength grade to roadway stability(deformation，plastic zone，stress state of support elements) is discussed. The failure mechanism of bearing structure of soft rock roadway at great depth is analyzed in terms of the limitation of anchor net spray support and the necessity of high rigidity and high strength support. Surrounding rock bearing structure is hard to form or is easy to failure while the radial supporting strength is not enough；arch center with certain rigidity and strength is very useful and necessary. Field test is carried out with square confined concrete arch support scheme，this new high strength support system has great effect on surrounding rock stability control.

Key words： high stress soft rock roadway support failure mechanism

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2014.1594 OR http://www.rockmech.org/EN/Y2015/V34/I09/5

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