公路压覆石膏芒硝矿采空区稳定性分析及影响评价

Stability Analysis and Impact Assessment of Highway Constructed over Gypsum Mirabilite Mine Goaf

公路设计和建设压覆采空区时需要考虑采空区的稳定性,石膏芒硝矿采空区稳定性主要受顶板(护顶层)和矿柱稳定性的影响。文章对石膏芒硝矿采空区稳定性分析评价方法进行综述,并采用力学平衡法对贵港大岭至横县良圻公路压覆广西横县陶圩石膏芒硝矿采空区顶板稳定性进行理论和工程实例分析,结果表明该石膏芒硝矿采空区顶板稳定,采空区对公路建设和运营基本无影响。该分析评价方法实用可行,可用于公路压覆矿产资源研究和评价工作。

The highway design and construction shall consider the stability of mined-out area when go- ing over the mined-out area, and the stability of gypsum mirabilite mine goal is mainly affected by the stability of roof plate（roof protection layer）and ore column.This article described the stability analysis and evaluation method of gypsum mirebilite mine goaf, then, through the theory of mechanical bal- ance, it conducted the theoretical and engineering case analysis on the roof plate stability of Guigang Daling-Hengxian Liangqi Highway over the Yaoxu gypsum mirabilite mine goaf in Hengxian, Guangxi, the results showed that the roof plate in this gypsum mirabilite mine goaf is stable, and the goaf has little effect on the highway construction and operation.This analysis and evaluation method is practical and feasible,which can be used for the research and evaluation work of highway over mineral re- sources.