【摘要】 以钱家营煤矿16~#煤村庄下压煤部分为研究对象,通过UDEC数值模拟,计算了煤柱的塑性区大小及垂直应力,确定了条采工作面采40 m留设30 m煤柱。研究表明,地表变形在预测范围以内,节约了大量地面拆迁费用,同时提高了对压煤的回收率。更多还原

【Abstract】 Taking Qianjiaying coal mine No.16 coal seam under villages pressure coal as the research object, by UDEC numerical simulation,calculates the plastic zone size and vertical stress and determines the strip mining working face mining 40 m leaving in 30 m coal pillar. The study shows that the surface deformation is in the forecast range, saving a lot of land demolition costs, while improving the recovery rate of pressure coal.更多还原