软岩边坡平面滑动时效稳定性分析及结构优化  

Study of plane sliding timeliness stability and structure optimization of soft rock slope

作　　者：韩流[1] 周伟[1] 舒继森[1] 王思文[1] 孟庆武[1] 

机构地区：[1]中国矿业大学煤炭资源与安全开采国家重点实验室矿业工程学院,江苏徐州221116

出　　处：《中国矿业大学学报》2014年第3期395-401,共7页Journal of China University of Mining & Technology

基　　金：国家自然科学基金重点项目(51034005);煤炭资源与安全开采国家重点实验室自主研究课题(SKLCRSM10X01);高等学校博士学科点专项基金项目(20100095110019);中央高校基本科研业务费专项资金项目(2011QNA13);江苏高校优势学科建设工程项目(SZBF2011-6-B35)

摘　　要：为研究软岩边坡的长期稳定性,准确把握其安全服务期限,根据老化理论及软岩抗剪强度的时效表达式,提出了平面滑动形式的时效稳定系数计算方法,推导出稳定性均一的端帮边坡坡面角与高度的函数关系,研究了布沼坝露天矿西端帮边坡时效稳定性,给出了具体的治理措施,并对边坡几何结构进行了优化设计.结果表明:边坡的时效稳定系数随时间增长呈指数形式减小,西端帮边坡342-342′剖面缓帮至25°,346-346′剖面削帮至90m可以保证其服务期限内稳定;稳定性均一的边坡表现为凸边坡结构,坡面角随高度增加逐渐减小.In order to study the long-term stability of soft rock slope and its safety service period, based on the aging theory and the expression of timeliness shear strength for soft rock, a model for determining the timeliness stability factor of plane sliding is proposed, and the function between the end-slope angle and height is established. The stability of western end-slope in Buzhaoba surface mine is investigated, and a detailed control measures is introduced and then carried out, the geometric construction of the western end-slope was optimized. Results show that the timeliness stability factor of slope sliding decreases with time exponentially. The western end-slope will be stable during its service period after the angle at section 342-342＇is cut to 25° and the height of section 346-346＇ is reduced to 90 m.

关 键 词：软岩边坡 时效强度 平面滑动 稳定系数 边坡结构 

分 类 号：TD824.7[矿业工程—煤矿开采]