含顺倾弱层边坡三维稳定性计算方法研究

doi:10.16265/j.cnki.issn1003-3033.2019.03.016

中国安全科学学报 ›› 2019, Vol. 29 ›› Issue (3): 95-101.doi: 10.16265/j.cnki.issn1003-3033.2019.03.016

含顺倾弱层边坡三维稳定性计算方法研究

王东¹ 教授, 李广贺¹, 曹兰柱¹ 教授, 徐晓惠² 高级工程师, 张立国¹

1 辽宁工程技术大学矿业学院,辽宁阜新 123000;
2 内蒙古平庄能源股份有限公司,内蒙古赤峰 024000

收稿日期:2018-11-19 修回日期:2019-01-25 发布日期:2020-11-26
作者简介:王东 (1978—),男,辽宁法库人,博士,教授,博士生导师,主要从事露天开采及边坡工程方面的教学和科研工作。E-mail: lntu_wd@163.com。
基金资助:
国家自然科学基金资助(51874160);辽宁省高等学校创新人才支持计划项目(LR2016039)。

Research on method for calculating three-dimensional stability of slope with inclined weak-layers

WANG Dong¹,LI Guanghe¹,CAO Lanzhu¹,XU Xiaohui²,ZHANG Liguo¹

1 College of Mine,Liaoning Technical University,Fuxin Liaoning 123000, China;
2 Inner Mongolia Pingzhuang Energy Co.,Ltd,Chifeng Inner Mongolia 024000, China

Received:2018-11-19 Revised:2019-01-25 Published:2020-11-26

摘要/Abstract

摘要： 为了解决含顺倾弱层边坡弱层暴露长度的计算难题,综合考虑岩体赋存特征与滑体三维空间形态,构建含顺倾弱层边坡三维滑体的简化力学模型,分析滑体边界上的力学条件,基于极限平衡理论,推导获得确定弱层暴露长度的含顺倾弱层边坡三维稳定性计算方法。将该方法应用于白音华一号露天煤矿,并采用基于连续介质力学的离散元方法(CDEM)进行模拟验证。研究结果表明: 白音华一号露天煤矿非工作帮边坡稳定系数F_s与弱层暴露长度L负相关,临界暴露长度约为500 m,允许暴露长度约为300 m;通过该方法确定的弱层暴露长度与模拟结果有显著的一致性。

关键词: 边坡稳定性, 顺倾弱层, 三维极限平衡法, 暴露长度, 基于连续介质力学的离散元方法(CDEM)

Abstract: For the sake of calculating the exposed length of the slope with inclined weak-layers, and considering the occurrence characteristics of rock mass and the spatial geometry of the potential landslide, a simplified mechanical model was built for the three-dimensional landslide of the slope with inclined weak-layers. The mechanical conditions on the boundary of landslide body were analyzed. A method for the three-dimensional stability of slopes by calculating the exposed length of inclined weak-layers was obtained with the theory of limit equilibrium. The method was verified by CDEM in Baiyinhua 1st open pit mine. The results show that there is a negative correlation between the stability coefficient F_s and the exposed length L of the weak layer in Baiyinhua 1st open pit mine non-working slope, the critical exposed length is about 500 m and the allowable exposure length is about 300 m, and that the exposed length of weak layer determined by this method comforms with the simulation results.

Key words: slope stability, inclined weak-layer, three-dimensional limit equilibrium method, exposed length, continuum-based discrete element method(CDEM)

中图分类号:

X928.03

王东, 李广贺, 曹兰柱, 徐晓惠, 张立国. 含顺倾弱层边坡三维稳定性计算方法研究[J]. 中国安全科学学报, 2019, 29(3): 95-101.

WANG Dong,LI Guanghe,CAO Lanzhu,XU Xiaohui,ZHANG Liguo. Research on method for calculating three-dimensional stability of slope with inclined weak-layers[J]. China Safety Science Journal, 2019, 29(3): 95-101.

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含顺倾弱层边坡三维稳定性计算方法研究

Research on method for calculating three-dimensional stability of slope with inclined weak-layers

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