建筑物下残煤安全复采设计及应用

Safety repeated mining and application of residual coal under buildings

为了解决西安矿老矿区资源枯竭、建筑物下残留煤柱遗存问题,采用概率积分法计算了16个残煤块段20个工况开采后的地表移动变形,分析了不同开采工况对地表建筑物的影响,优化设计了残煤开采工作面。通过对距离较近的块段留设煤柱,对尺寸较大的块段采用条带开采,对个别地表变形较大区域的建筑物预先加固,实现了西安矿六采区残煤不迁村开采,有显著的工程价值,可为类似条件下的建下残煤开采提供借鉴。

In order to solve the problem of the resource exhaustion and the residual coal pillars under the buildings in the old mining area in Xi’an Coal Mine,the probability integral method was used to calculate the surface movement and deformation after mining of 16 residual coal blocks in 20 working conditions,the influence of the different mining conditions was analyzed on the surface buildings,and the design of the residual coal mining face layout was optimized.By setting coal pillars for the blocks with relatively close distance,using strip mining for the blocks with the larger size,and strengthening buildings in some areas with larger surface deformation in advance,the mining of the residual coal was realized without moving to the village in the sixth mining area of Xi’an Coal Mine,which had the significant engineering value and could provide the reference for the mining of the residual coal under the buildings under similar conditions.