Research Development and Critical Problems Existing in Strata Movement and Its Control

Under the guidance of green mining and scientific ideas, strata movement its control have achieved a series research developments in China. Based on summary achievements related to characteristics, influences activity surface environment, utilizing controlling methods, critical problems that need be solved are identified for study control. Mining activities will cause redistribution stress. The overlying incurs deformation, breaking, under this During period, energy accumulation release occur roof strata, initiation expansion overburden fractures occur. This demonstrates impact underground safety ground environment. Thus, characteristics longwall faces should emphasized future. At present, rock is still stage qualitative description. Monitoring stope making predictions according monitoring results play great role ensuring production. Furthermore, system stiffness theory intelligent techniques developed.