煤矿老采空区地基注浆处治后稳定性评价研究

Study on Stability Evaluation of Old Goaf Foundation of Coal Mine after Grouting Treatment

采空区引发的地表沉降影响建筑物安全,且其影响通常贯穿于构筑物的整个使用寿命。针对注浆法处治后的老采空区建筑地基,根据荷载临界影响深度与附加应力影响深度等分析评价方法,开展稳定性分析及建筑物对采空区稳定性影响评价研究。结果表明:建筑物所形成的附加应力在正常工况条件下不会引起采空区活化。提出了采空区地基稳定性综合评价研究方法,也为类似工程提供了技术借鉴。

The surface settlement caused by the goaf would affect the buildings'safety,and its influence is usually throughout the entire service life of the structure.Focusing on the buildings'foundation of the old goaf treated by grouting,according to the analysis evaluation methods of load critical depth and additional stress depth,this paper carried out the stability analysis and the study of the influence evaluation of buildings on the goaf stability.The results showed that the additional stress formed by buildings would not activate the goaf under normal working conditions.This paper presented a comprehensive evaluation method for the stability of the foundation of the goaf,providing a technical reference for similar engineering.