| In this thesis, compositive research techniques including of three-dimensional numerical simulation and in-situ measurement are carried out to investigate the distribution of surrounding rock in 23upper03 of Lu Wa Colliery In the thesis, the author concludes that the laws of roof activities and its power, movement laws of top-coal and roof and distortion laws of gates surrounding rock.. The results provide a theoretical basis for rock pressure and strata control, do good to the safely mining in working face and contribute to further study. At the same time it provides beneficial lessons for other similar mining conditions.
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