露井联采下采动边坡移动规律及开采参数优化

针对安太堡露天矿南部采用地下开采后，后期露天开采边坡稳定性将受到很大影响的情况进行了研究。研究结果表明，水平煤层露井联采下露采边坡岩体破坏规律存在明显的3个破坏分区，地下开采导致上述3个分区存在不同的变形特征，其露井联采边界参数是决定3个分区稳定的关键因素。通过对边界参数的优化分析，要确保安太堡南帮边坡岩体的稳定，地下与露天之间必须协调开采：其地下矿井需重新确定地下开切眼位置，即以Y=74 160为界以南布置地下开采工作面；露天矿开采考虑到安太堡南帮上部边坡岩体受地下开采影响明显，提出了南帮露天开采应采用“组合边坡”的设计思想，即+1 375以上平台岩土边坡角度应由原来的75°降低到62.58°。

Research on the Failure law of Mine Slope and the Optimization of Boundary Parameter between Open-pit and Underground Combined Mining

After underground mining at the southern Antaibao open-pit mine, the slope stability in open-pit mining will be affected in later period. The research indicates that failure law of the slope rock mass for the horizontal coal seam under open-pit and underground mining exist three obvious failure zones. Underground mining causes the above three zones to exist different deformation characteristics, and the boundary parameter of open-pit and underground mining is the key factor to determine the three zones stability. Through optimized analyzing the boundary parameter, in order to guarantee the slope rock mass stability at the Antaibao south slope, the underground mining and open-pit mining must coordinate: the open-off-cut position of underground mining must be re-determined, namely taking Y=74160 as the southern boundary to arranging mining working surface. Open-pit mining, which considers the obvious influence of mining for the upside slope rock mass at the Antaibao south slope, proposes that open-pit mining of the south slope should use the design thought of “the combined slope”, namely above +1375 platform the geotechnical slope angle should reduce from the 75 degree to the 62.58degree. Above synthesis measures applying solves effectively technological problem of the slope stability at open-pit and underground mining of the Antaibao south slope in the recent years, and obtains the remarkable effectiveness