【摘要】 为解决西细庄矿建筑物下煤炭资源回收的问题,结合其实际地质条件,运用关键层理论计算出5煤覆岩关键层的位置及其破断距;由于主关键层离地表较近,以亚关键层2为设计依据,确定了条带开采的采宽不大于70 m;结合采出率对条带开采的影响,提出了条带开采方案,并运用煤柱强度相关理论对其进行稳定性校验。运用理论分析和数值模拟对所提方案的煤柱应力和地表变形进行分析,并根据模拟结果确定出了合理的条带开采方案。更多还原

【Abstract】 In order to solve the problem of recovering coal resources under ground buildings at Xixizhuang coal mine,combined with its geological,the position of the key strata and the interval of roofing breaking in the overlying strata of 5 coal seam are calculated by the key strata theory;the inferior key strata 2 is put forward as design basis because of the key strata is close to the ground,the mining width of strip mining is not more than 70m;combined with the influence of the recovery rate on the strip mining,the strip mining schemes are proposed,the stability of these schemes are checked by the pillar strength theory.The pillar stress and surface deformation of the schemes are analyzed by theoretical analysis and numerical simulation,then the reasonable schemes of strip mining are determined.更多还原