摘要
为了提高排土场建模和稳定性评价的准确度,对排土场的不同作业方式产生的重塑荷载进行理论分析,结合孔隙结构压缩变形特性揭示了重塑过程中岩土体抗剪强度的增长机理。结合胜利露天矿生产实际,提出了内排土场倾斜分层和外排土场水平分层方法,并模拟分析了地层划分对排土场稳定性评价结果的影响。结果表明:分层之后的内、外排土场稳定系数比传统不分层的排土场稳定系数分别提高了6.2%和30%,地层不同力学参数的差异造成了潜在危险滑面整体向上部偏移。
To improve the accuracy of the modeling and stability evaluation of the waste dump,the theoretical analysis is conducted on the remolding load produced by different operation modes of the waste dump.Combined with the compressive deformation characteristics of pore structure,the growth mechanism of shear strength of rock and soil in the remolding process is revealed.Based on the actual production of Shengli Open-pit Mine,this paper puts forward the method of inclined stratification of internal waste dump and horizontal stratification of external waste dump,and analyzes the influence of stratum division on the evaluation result of waste dump stability.The results show that the stability coefficients of the internal and external waste dumps are 6.2%and 30%higher than those of the traditional waste dumps,respectively,and the difference of stratum mechanical parameters results in the overall upward migration of the potentially dangerous slide surface.
作者
宋仁忠
韩兴
杨日
佘长超
韩流
SONG Renzhong;HAN Xing;YANG Ri;SHE Changchao;HAN Liu(Shenhua Beidian Shengli Energy Co.,Ltd.,Xilinhot 026015,China;China University of Mining and Technology,Xuzhou 221116,China)
出处
《煤矿安全》
CAS
北大核心
2020年第12期283-287,共5页
Safety in Coal Mines
基金
国家重点研发计划资助项目(2016YFC0501103)
国家自然科学基金青年科学基金资助项目(51804298)
国家自然科学基金面上资助项目(51774271)。
关键词
排土场边坡
边坡稳定
重塑效应
分层赋值
边坡稳定性评价
waste dump slope
slope stability
remolding effect
layered assignment
slope stability evaluation
