井采影响下边坡岩体变形破坏规律研究

针对Ⅱ型露井联采,露天转地下开采的情况,对井采影响下边坡岩体变形机制、地表移动特征及其对边坡岩体强度的弱化等进行了探讨。安家岭露天矿西排土场北部变形区实例分析表明,受井采影响,边坡上部土体由于沉陷变形出现差异性拉张裂隙,形成主动下沉滑移段,前缘被动段以沿弱层滑移的水平位移为主,数值模拟结果与现场实际基本吻合。

Study on Failure Rule of Rock Slope Affected by Underground Mining

For the typeⅡof open-pit and underground combined mining,during transition from open-pit to underground mining,the influence of underground mining on the deformation mechanism of slope rockmass,characteristic of surface movement and strength of slope rockmass are discussed.The scope of deformation is analyzed in the northern deformation region of west dumping site of Anjialing open-pit,and the results showed that because of sinking,different tensile cracks appears in the upper soil of slope affected by underground mining,forming initiative sinking slide,and the deformation the front passive rock segment mainly is horizontal displacement along weak layer.The result of numeral simulation is similar to location.