近水平煤层露天矿边坡三维稳定性研究  

Study on 3D stability of slope in surface mine with subhorizontal seams

作　　者：王东[1] 王珍[1] 曹兰柱[1] 宋子岭[1] 

机构地区：[1]辽宁工程技术大学矿业学院,辽宁阜新123000

出　　处：《煤炭科学技术》2016年第8期86-90,共5页Coal Science and Technology

基　　金：国家自然科学基金煤炭联合基金资助项目(U1361211);国家自然科学基金资助项目(51474119;51104084);辽宁省煤炭资源安全开采与洁净利用工程研究中心开放基金资助项目(LNTU15KF08)

摘　　要：为最大限度回采胜利煤田西二露天矿西端帮边坡下压煤,应用数值模拟与极限平衡法相结合的方法,分析了不同采场工作帮、内排土场追踪距离条件下端帮边坡的三维破坏模式及稳定性变化规律。结果表明:西端帮边坡受到工作帮与内排土场的双重支挡作用,其变形与稳定性具有显著的尺寸效应,减小追踪距离是控制该类边坡变形、提高边坡稳定性的有效途径;边坡滑裂面近似一椭球面,其水平方向的长轴与短轴均随着追踪距离的增大近线性增大;边坡稳定系数随着追踪距离的增大呈负指数规律下降,当追踪距离不超过100 m时,其稳定性可满足安全要求;当追踪距离达到200 m时,边坡稳定性的尺寸效应基本消失。In order to utmost mine the seam under the slope at the west terminal of Xi＇er Surface Mine in Shenli Coalfield,a method combined with the numerical simulation and limit equilibrium method was applied to analyze the 3D failure mode and stability variation law of the end slope under the different mining working slope,inner dumping tracing distance. The results showed that the slope at the west high wall was affected by the double support role of the working high wall and inner dumping site. The deformation and stability would have obvious size effect. The reduction of the tracing distance would be an effective access to control the slope deformation and improve the stability of the slope. The slip surface of the slope would approximate an ellipsoid surface,the long axis and short axis in the horizontal direction would be increased in linear with the tracing distance increased. The stability coefficient of the slope would be reduced in a negative index law with the tracing distance increased and when the tracing distance was not over 100 m,the stability could meet the safety requirement.When the tracing distance reached 200 m,the size effect of the slope stability would disappear basically.

关 键 词：近水平露天煤矿 边坡三维稳定性 破坏模式 尺寸效应 追踪距离 

分 类 号：TD824.7[矿业工程—煤矿开采]