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In virtue of effect of N-S intensive ground stress and mining disturbance to +579E2EB_(1+2) mining site at Weihuliang Mine,the dip angle and section height is 65° and 52 m,respectively,the collapses happed frequently during mining.Firstly,mining condi- tions,spatial structure and parameters were investigated.Then physical simulation and dynamic numerical tracing and elaborate simulation relating roof and top-coal were ap- plied based on 2D-Block Program and quantitative regularity of stress at variable depths had been estimated.Furthermore,it was manifested that effective measures,i.e.,fast mining,control symmetrical top-coal-caving at dip and strike directions,optimizing ventila- tion system,active-stereo preventing gas were performed successfully in mining practice. Ultimately,the derived dynamic hazard were prevented so as to safety mining.
In virtue of the effect of NS intensive ground stress and mining disturbance to + 579E2EB_ (1 + 2) mining site at Weihuliang Mine, the dip angle and section height are 65 ° and 52 m, respectively, the collapses happed frequently during mining. Firstly, mining condi- tions, spatial structure and parameters were investigated. Chen physical simulation and dynamic numerical tracing and elaborate simulation relating roof and top-coal were ap- plied based on 2D-Block Program and quantitative regularity of stress at variable depths had been estimated. Evenly, it was manifested that effective measures, ie, fast mining, control symmetrical top-coal-caving at dip and strike directions, optimizing ventila- tion system, active-stereo preventing gas were performed successfully in mining practice. Ultimately, the derived dynamic hazard were born so as to safety mining.