地质勘探工作中对老采区稳定性的评价

Evaluation on the stability of the goaf of geological exploration

在建筑、管线、铁路、公路等工程的勘察设计工作中,经常遇到地下留有采空区的工程地质问题.这些老采区在地面建筑物荷载或交通运输等荷载的作用下,会发生残余变形,甚至造成地层塌方等地质灾害事故,对建筑工程安全构成严重的威胁.以力学平衡方法为基础,针对老采空区上覆较厚岩层条件,采用力学分析方法进行研究,建立了以老采空区被动侧向压力情况下的力学模型,并以工程实例进行了稳定性分析与评价.实例计算结果与工程实际情况基本一致,说明该方法可以用来分析和评价老采空区上覆较硬地层的稳定性.

It has been proved that the underground mined-out area engineering geology problems in the buildings, pipelines, railways and highways engineering survey and design work would exist. The residual deformation on the ground building load or traffic load will occur in these old mining areas, even cause such geological disasters and accidents as strata landslide constitute. Based on the mechanics balance method, the passive lateral model is established according to the old mined-out area overlying thick strata conditions by the method of analysis mechanics. And ithe engineering example for the stability analysis and evaluation show that the method can be used in the analysis and evaluation of old goaf stability of overlying the hard formation.