浅埋特大采空区探测、稳定性分析及处置的实例研究

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Abstract Based on the exploration and laser scanning of 3D space in the field，the stability and predictive analysis of the shallow and weak roof large goaf at Shouyun mine are made by using FLAC3D numerical simulation. Studies have shown：the limit state of crushing destruction is achieved at the two corners of roof plate，and gradually expands into a deep extension of the arch. There is the central tensile stress distribution clearly in the roof，but tensile failure will not be caused. Displacement of surrounding rock mass is eminent，but the overall of the goaf is stable. Numerical simulation research also shows that a certain size roof window will yield the limit state of shear failure near the fault F53. A relief window is formed by a fan-shaped deep holes blasting that is 13 layer of 132 deep holes? milliseconds blasting，the goaf collapsed gradually from the south to north on its own，an overlying rock protection layer of sublevel caving is formed by filling empty areas. The large goaf is handled safely.

Key words： mining engineering goaf roof stability numerical simulation laser scanning blasting

Received: 28 October 2011

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http://www.rockmech.org/EN/Y2012/V31/Is2/3882

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