交叉断层影响下工作帮边坡顶底部境界位置优化研究

Study on optimization of boundary position at the top and bottom of working slope under the influence of cross faults

为了研究白石湖露天矿一条区南帮(工作帮)受断层开采影响情况,优化南帮边坡参数,基于原有地质资料及现场勘查资料,建立了NB21-2剖面的工程地质简化模型,并通过数值模拟确定了剖面滑动模式,在此基础上优化了边坡角度,提升了边坡整体稳定性,结果表明断层对南帮开采影响较大,过断层开采后,提升了边坡稳定系数,同时将断层北侧煤炭资源全部采区,确定了最终优化角度为28°,界定了最终压帮位置及南帮顶、底部境界的位置。

In order to study the influence of fault mining on the south slope(working slope)in one area of Baishihu Open-pit Mine and optimize the south slope parameters,the article establishes a simplified engineering geological model of nb21-2 profile based on the original geological data and field survey data,and determines the profile sliding mode through numerical simulation.On this basis,we optimize the slope angle and improve the overall stability of the slope.The results show that the fault has a great impact on the south slope mining.After the fault mining,the slope stability coefficient is improved.At the same time,the final optimization angle is determined to be 28°for all the coal resources in the north of the fault,and the final position of pressing the slope and the positions of the top and bottom boundaries of the south slope are defined.