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根据神府矿区主采煤层开采实际情况,采用物理相似模拟和数值模拟实验,分析了浅埋煤层群开采煤柱下方的覆岩垮落规律、支架受力分析、应力传递特征及煤柱合理错距对地表的影响。综合得出了2~(-2)煤与3~(-1)煤区段煤柱的最小错距为50 m,并运用理论计算,确定了同采工作面初采阶段的合理错距应大于131.4 m,正常回采期间大于79.1 m。依据研究结论,建立2~(-2)煤与3~(-1)煤联合开采的工作面布置方式模型。
According to the actual mining situation of the main coal seam in Shenfu Mine, physical similar simulation and numerical simulation experiments are carried out to analyze the caving rule of overburden coal pillar under mining of shallow coal seam group, the stress analysis of the support, Effect of reasonable distance on the surface. It is concluded that the minimum deviation of coal pillar in 2 ~ (-2) coal and 3 ~ (-1) coal section is 50 m, and the theoretical calculation is adopted to determine the reasonable deviation of initial coal mining interval Greater than 131.4 m, and greater than 79.1 m during normal production. According to the conclusion of the research, a model of face layout for coal mining with 2 ~ (-2) coal and 3 ~ (-1) coal was established.