摘要
Abstract
The mining situation of the house mining goaf left by Ordos Dadijing Coal Mine is unclear.In order to analyze its impact on the safe operation of the upper highway toll stations,through means of ground geophysical exploration,drilling,and visualization detection,combined with visualization detection means such as color drilling television,three-dimensional laser scanning inside the borehole and others,the mining situation of the house mining goaf is conducted to be explored.Based on InSAR satellite images at highway toll stations over the years,the situations of surface subsidence over the years are analyzed,it is found that the maximum cumulative surface subsidence amount is about 100 mm.According to comprehensive exploration results and mining subsidence theory,the depth and thickness ratio of the house mining goaf is 11-20.5,with a high risk of surface collapse;The safety stability coefficient of the remaining coal pillars is 1.08,which is lower than the standard threshold of 1.2 and is in an unstable state.The house mining goaf is stable under the load of the toll station.Through comprehensive analysis,it is believed that the house mining goaf impacts the safety of toll stations,measures such as filling governance,monitoring and others need to be taken,the grouting governance can significantly reduce the probability of surface collapse at toll stations by over 90%,and ensure the safe operation of highway toll stations.关键词
房采采空区/地表突然塌陷/公路收费站/综合勘查/InSAR监测/稳定性分析/灾害防治Key words
house mining goaf/sudden collapse of surface/highway toll station/comprehensive exploration/InSAR monitoring/stability analysis/disaster prevention and control分类
矿业与冶金
