小煤窑采空区场地综合勘察及治理措施建议

Comprehensive Site Investigation and Treatment Methods for Abandoned of Small Coal Mine Cavities

小煤窑多为无证开采、无开采规划、无采矿资料,具有开采深度小、采空区分布复杂、隐蔽性高的特点,查明其分布特征及影响范围是工程重点难点。以某电厂主厂区小煤窑采空区场地为例,结合现场地形地质条件、干扰因素、前期资料收集情况等,采用高密度电法、浅层地震波反射法和孔内电法CT等综合物探手段进行小煤窑采空区勘察,并为治理措施提供建议。地基检测结果表明,采取的治理措施效果良好,说明综合勘察法在小煤窑采空区勘察中适用性较强,能为治理设计提供有力依据,可为类似工程提供借鉴。

Small coal mines are mostly uncertified mining.There is no mining planning,no mining maps for these mined galleries.They have the characteristics of small mining depth,complex distribution of mined areas,and extremely difficult to locate all these abandoned galleries.Locating these empty mined area distributions and their influence area have significant importance of the project.This paper presents a case history of the comprehensive geotechnical investigation and mitigation program at the abandoned mining area for a main area for a power plant.The testing program after the ground improvement show that the effect of the control measures used in the investigation and mitigation are satisfactory,and the comprehensive investigation methods used are appropriate for the exploration of the abandoned galleries of small coal mines,which can provide a strong basis for the control design and can provide a useful reference for similar projects in the future.