露井联采含断层逆倾边坡岩移规律试验研究  

Tests on Movement Rules of Counter-tilt Slope with Fault under Combined Mining of Surface and Underground

作　　者：王东[1] 吴国辉 曹兰柱[1] 姜聚宇 Wang Dong;Wu Guohui;Cao Lanzhu;Jiang Juyu(College of Mines ,Liaoning Technical University ,Fuxin 123000, China)

机构地区：[1]辽宁工程技术大学矿业学院,辽宁阜新123000

出　　处：《金属矿山》2018年第5期35-39,共5页Metal Mine

基　　金：国家自然科学基金项目(编号:51104084;51474119);国家自然科学基金重点项目(编号:U1361211);高等学校博士学科点专项(编号:20122121110003)

摘　　要：针对内蒙平庄西露天矿露井联合开采条件下顶帮含断层逆倾边坡岩体变形破坏和稳定性问题,采用相似材料模型试验方法,研究了各个时期露井联采的覆岩及地表移动规律,圈定了地下开采形成的压缩、拉伸变形区以及塌陷范围,分析了地下开采对边坡变形的影响。试验结果表明,随着五家矿四井开采使得上覆岩层发生垮落和下沉变形,周期性形成"拱式"结构;地下回采过程中的顶板来压步距较大的原因是由于辉绿岩的存在。开切眼、工作面的充分采动角为76°和62°,对应边界角为60°和55°。F1断层与工作面垮落线相交形成的倒三角岩体沿断层面发生下滑,导致沉陷区下方岩体受到侧向挤压而发生破坏,同时加剧了+608 m以上岩体的变形,对边坡稳定性造成不利影响。研究结果对露天矿安全高效生产具有重要意义。In order to investigate the issue on deformation and stability of the rock mass of counter-tilt slope with fault in Pingzhuang Western Surface Mine in Inner Mongolia,similar material simulation experiments were made to study the movement rules of overlying rock stratum and ground surface under different period of combined mining,then the compression zone,tensile zone and subsidence area caused by underground mining were delineated and the influence of underground mining on the slope deformation was analyzed. It is shown that,with caving and subsidence deformation occurred at the overburden in Wujia 4 th Underground Mining,the structure of‘arch＇was developed periodically;The roof weighting intervals in underground mining are larger because of the existence of diabase. That the angles of full mining subsidence between the open-off cut and the working face are 76° and 62° and the corresponding boundary angles are 60° and 55° respectively. The inverted triangular rock mass formed by the joint of the rock caving border with Fault F1 slips down along the fault plane,so the rock mass under the subsidence area are damaged under lateral compress and the deformation of the rock mass over ＋608 m become worse,which has a negative impact on the slope stability. The research achievements are meaningful to efficient mining and safety of opencast mine.

关 键 词：露井联采 断层 逆倾边坡 岩移规律 边坡稳定性 

分 类 号：TD824.7[矿业工程—煤矿开采]