采空区围岩稳定性影响因素分析  

Analysis of Factors Influencing Stability of Surrounding Rock in Goaf

作　　者：邵勇[1] 阎长虹[2] 汤小平[1] 

机构地区：[1]连云港职业技术学院,连云港市222006 [2]南京大学地球科学与工程学院,南京市210093

出　　处：《公路》2015年第5期229-233,共5页Highway

摘　　要：采用数值模拟的手段分析了采空区围岩稳定性影响因素,主要分析了围岩的黏聚力、摩擦角、弹性模量、泊松比及地表坡度对围岩稳定性的影响,计算结果表明,物理力学参数中黏聚力对围岩的稳定性影响最大,泊松比最小。另外地表坡度对围岩稳定性的影响存在一个临界值,当地表坡度在小范围变动时围岩稳定性变化不大,达一定临界值时稳定性骤然下降,模拟分析可以为采空区围岩稳定性评价提供理论参考。The factors influencing the surrounding rock stability are analyzed by numerical simulation, which is mainly focused on the impact of the rock cohesion, friction angle, elastic modulus, Poisson＇s ratio and the ground surface slope ratio on the stability of surrounding rocks. The results show that among the physical and mechanical parameters, cohesion has the greatest impact on the stability of surrounding rock, and the Poisson＇s ratio has the minimum. Furthermore the impact of the surface angle to stability of surrounding rock has a critical value, when the slope changes in the small range, the surrounding rock stability has a minor variation, and when the slope reaches to a certain critical value, the stability happens a sudden drop. Simulation analysis in this paper can provide a theoretical reference for evaluation of surrounding rock stability.

关 键 词：采空区 物理力学参数 地表坡度 敏感性 分析 

分 类 号：U451.2[建筑科学—桥梁与隧道工程]