辽宁工程技术大学学报（自然科学版）Issue(7)：886-890,5.DOI:10.3969/j.issn.1008-0562.2013.07.005
震动作用下采空区上方地基稳定性
Stability analysis of foundation above abandoned golfs under seismic action
摘要
Abstract
In order to discuss the secondary activation mechanism and the regular pattern of deformation and failure of abandoned goafs under the actions of earthquakes, this paper, by means of the numerical simulations, studied the stability of overlying rock after reaching the excavation relatively stable condition under the action of seismic wave. The simulation results show that the overburden stress redistribution happened after the earthquake and the stress concentration phenomenon occurred in the two boundaries of mined-out areas. The stress and displacement of delamination model is more obvious than that of the no delamination model, which explains that the overlying rock of abandoned goafs are more likely to have the “activation” under seismic force; but no delaminating of the abscission layer model and the model under the action of seismic wave stress value of each observation point changes over time, and the dynamic stress time history of volatility curve and the cycle is consistent with the input acceleration period. The dynamic stress distribution of roof and the static stress distribution law under the action of gravity have many similarities.关键词
地震作用/废弃采空区/上覆岩层/数值模拟/活化/离层/稳定性/应力分布Key words
earthquake action/abandoned golfs/overlying rock/numerical simulation/activation/delamination/stability/stress distribution分类
矿业与冶金引用本文复制引用
海慧,肖辉瓒,于永江..震动作用下采空区上方地基稳定性[J].辽宁工程技术大学学报（自然科学版）,2013,(7):886-890,5.基金项目
国家自然科学基金资助项目 （）
