通过对鲍店煤矿八采区山西组主采3煤顶部基岩及第四系下组2个主要充水含水层富水性特征的分析,确定其转变为防砂煤柱留设是安全可行的。针对采区山西组主采3煤层较大部分存在分叉现象的实际情况,分别计算了3上煤层和3煤层的留设高度;3上煤层与3下煤层属于近距离煤层开采,在重复开采条件下计算了3下煤层留设高度。 Based on the analysis of the main water-bearing characteristics of the top three bedrock of coal seam 3 and the two main aquifer of Aquifer under Quaternary in the Shanxi Formation of No.8 mining area in Baodian Coal Mine, it is safe and feasible to change into sand control pillar. In view of the actual situation of bifurcation in most of the main coal seam 3 in the mining area of ​​Shanxi Province, the remaining heights of upper 3 and lower 3 coal seam were calculated respectively. The upper 3 and lower 3 coal seam belonged to short distance coal seam mining, Under the conditions of 3 to set the remaining height of the coal seam.