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根据潞安矿区王庄煤矿6206综放工作面开采条件,在分析煤层顶板覆岩组合及力学结构特性基础上,采用现场实测、数值模拟、物理模拟等手段综合研究了中硬覆岩综放一次采全厚裂缝带发育特征。结合已有的裂缝带实测资料,通过回归分析,得出中硬覆岩综放裂缝带发育高度与一次采放总厚度成正比,与已有经验公式相比,更能揭示综放覆岩破坏剧烈的特点。
According to the mining conditions of 6206 fully mechanized top coal caving mining face in Wangzhuang Coal Mine, Lu’an Mining Area, based on the analysis of overlying strata and mechanics structural characteristics of coal seam roof, a comprehensive study was carried out by means of field measurement, numerical simulation and physical simulation. Mining full thickness crack development characteristics. Combined with the existing measured data of the fracture zone, the regression analysis shows that the height of the fully mechanized caving seam with medium-hard overburden is in direct proportion to the total thickness of the first mining operation. Compared with the existing empirical formula, the developed height of the fully- Dramatic features.