辽宁工程技术大学学报（自然科学版）2012，Vol.31Issue(3)：323-326,4.
围岩性质对采空区地基稳定性的影响
Impact on foundation stability at goaf by bed rock characteristics
摘要
Abstract
In order to understand the impact on foundation stability at goaf area by bed rock characteristics, this study investigates single rock stratum and compound rock strata through numerical simulation. The results show that in single stratum, the ground surface subsidence and the horizontal displacement evidently decrease, the range of large deformation and the degree of damage are reduced too with the increase of overlying stratum hardness. However, if the overlying stratum is hard rock and other conditions are the same, the foundation stability in goaf area will be reduced with the increase of overlying stratum hardness. While in compound rock strata, the surface movement and deformation with rigid upper layer and soft lower layer are smaller than that with rigid lower layer and soft upper layer. According to the state diagram of plastic zone, the more damage exists in the rock with rigid upper layer and soft lower layer. The soft and hard rock interface more likely has the bedding-slip separated fissures. Therefore, the rock strata with rigid upper layer and soft lower layer are unfavorable to the long-term foundation stability in goaf area.关键词
围岩性质/采空区/地基稳定性/数值模拟/破坏程度/上覆岩层/单一岩层/复合岩层Key words
property of wall rock/ goaf/ foundation stability/ numerical analysis/ the degree of damage/overburden rock/ single rock/ compound rock分类
矿业与冶金引用本文复制引用
贺丽萍,于永江..围岩性质对采空区地基稳定性的影响[J].辽宁工程技术大学学报（自然科学版）,2012,31(3):323-326,4.基金项目
国家自然科学基金项目资助(51174106 （）
50804020) （）
