【作者】 窦家环；

【导师】 何廷峻； 杨本水；

【作者基本信息】 安徽理工大学 ， 采矿工程， 2007， 硕士

【摘要】 本文采用实验室分析、理论分析、物理与数值模拟和现场试验的综合研究方法,对五沟煤矿厚含水松散层下开采时的上覆岩层移动规律、覆岩力学组合结构类型、导水裂隙带等进行了深入研究,并分析了风化基岩的物理力学性能及变异特征,建立了薄基岩浅埋煤层上覆岩层破坏移动规律的工程地质模型,得出了1011工作面开采期间直接顶初次垮落步距、基本顶初次来压步距、周期来压步距;分析了导水裂隙带的发育形态;获得了厚松散含水层下防水煤岩柱的合理高度,提高了综采工作面的回采上限。研究成果不仅为煤矿提高资源回收率、水体下采煤提供了理论依据,而且对该矿井和其它类似条件工作面提高回采上限有一定的借鉴和指导意义。图[75]表[10]参[50]更多还原

【Abstract】 In this paper, compositive research techniques including of theoretical analysis and laboratory analysis, physics and numerical simulation, in-situ measurement are carried out to investigate into movement laws of overlying strata, mechanical composite structure types of overburden strata and fractured zone of mining under thick aquiferous loose bed in WuGou mine. Physicical mechanics capability and variation characteristics of efflorescent bedrock are analyzed and engineering geologic model reflecting the rules of overlying strata movement and damage of weak bedrock shallow embedding is modeled. The results, the immediate roof collapse step pitch, main roof first weighting step pitch, periodic weighting step pitch, are obtained during face 1011 winning. Developed configuration of the fracturation zone is analyzed, and reasaonble width of waterproof rock-coal pillar under thick aquiferous loose bed is obtainded, and mining toplimit is improved. The results can provide theoretical basis for improving the recovery of mine and coal mining under water-bodies. At the same time, the results have guiding to improve mining toplimit for this mine and other similar conditions mine.更多还原