顺倾基底高段排土场边坡失稳模式与控制对策  

Instability Mode and Control Measures of High Slope in Waste Dump with Bedding Basement

作　　者：丁鑫品[1,2,3] 李凤明 刘博文[4] 任鹏 DING Xinpin;LI Fengming;LIU Bowen;REN Peng(China Coal Research Institute,Beijing 100013;Beijing Science and Technology Research Institute of Land Reclamation and Ecological Restoration,CCTEG,Beijing 100013,China;China Coal Research Institute Co.,Ltd.,Beijing 100013;China University of Mining and Technology(Beijing),Beijing 100083,China)

机构地区：[1]煤炭科学研究总院,北京100013 [2]中煤科工集团北京土地整治与生态修复科技研究院有限公司,北京100013 [3]煤炭科学技术研究院有限公司,北京100013 [4]中国矿业大学(北京),北京100083

出　　处：《煤矿安全》2020年第7期244-247,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51774184);中国煤炭科工集团有限公司科技创新创业资金青年基金资助项目(2018-TD-QN005);煤炭科学技术研究院有限公司科技发展基金资助项目(2018JC05)。

摘　　要：为了解决顺倾基底高段排土场边坡沿物料与基底接触面发生顺层滑动的问题,以安太堡露天矿背斜影响区内排搭路边坡为例,建立工程地质模型,采用数值模拟与极限平衡分析相结合的方法,研究了运输干道外侧高边坡剪应变增量、塑性区分布、位移特征及边坡稳定性。通过研究,探明了顺倾基底高段排土场边坡变形失稳模式为"圆弧-顺层"组合滑动,提出了基于反向排土的顺倾基底排土场高边坡稳定控制方法,通过分阶段排土施工,将运输干道外侧边坡高度由75 m减小至30 m,在保证边坡安全的同时有效缩短了内排运距。To solve the problem of bedding sliding along the contact surface between the material and the base of high slope in the waste dump with bedding basement,the dump slope of anticlinal tectonic influence area about Antaibao open-pit mine is taken as the example,and the engineering geological model is established.The combination method of numerical simulation and limit equilibrium analysis is used to study the shear strain increment,plastic zone distribution and displacement characteristics and slope stability of the lateral high slope about the main transport road.Through the research,it is proved that the deformation and instability mode of high slope in the waste dump with bedding basement is the combined sliding of"arc-bedding",the stability control method of high slope in the waste dump with bedding basement based on the reverse soil discharge is proposed.The lateral slope height of the main transport road reduces from 75 m to 30 m by the stage drainage construction,which can guarantee the safety of the slope and shorten the inner discharge distance effectively.

关 键 词：露天矿边坡 排土场 顺层边坡 失稳模式 高边坡稳定 

分 类 号：TD824.7[矿业工程—煤矿开采]