摘要
在探讨矸石山主要特征的基础上,基于Hoek-Brown非线性强度准则进行FLAC(fastlagrangian analysis of continua)数值模拟,分析矸石山稳定性随堆积高度的增加动态的变化过程。结果表明:随堆积高度增加,矸石山位移、变形程度增大,潜在滑移面逐渐形成,失稳破坏趋势渐增,且矸石山散粒层高度、面积增加,坡面出现局部滑塌几率增大;依据非线性强度准则计算得到的安全系数随矸石山高度增加而减小,符合矸石山堆积越高越不安全的实际情况。计算结果和理论分析表明采用文中方法分析矸石山稳定性具有合理性。
Coal mining waste dumps are representative artificial accumulations of bulky rock and soil material. Certain factors make these dumps possess characteristics such as self-organized criticality, nonlinear shear strength of the waste accumulation. We discusse the main waste dump characteristics and subsequently produced numerical simulations of the stability of waste dumps of various heights using the Fast Lagrangian Analysis of Continua and based on the Hoek-Brown nonlinear strength criterion. The simulation calculation results show that the stability is a dynamic evolving process corresponding to increasing waste dump height. Safety factors, based on a nonlinear rule, vary with the waste dump height. Theoretical analysis and calculated outcomes reveal a progressive failure rule of waste dumps, and all indicate the methods we put forward are reasonable.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2009年第2期212-217,共6页
Journal of Chongqing University
基金
重庆市自然科学基金资助项目(2006BB7171)
重庆国土资源和房屋管理局科研计划资助项目(财建[2005]660号)
关键词
堆积散体
矸石山稳定性
自组织临界性
抗剪强度非线性
FLAC数值模拟
bulky rock and soil material
waste dump
stability
self-organized criticality
nonlinear
shear strength
Fast Lagrangian Analysis of Continua
