高真空击密法在尾砂库地基处理中的应用

Application of Point Well Dewatering and Dynamic Compaction Methods in the Treatment of Tailing Sand

尾砂库是在选矿完成后以泥浆形式排放出来的细粒废渣矿渣堆积形成,其具有高含水量、高孔隙率等特点。'高真空击密法'是一种具有工期短、速度快且造价低等特点的新型地基处理技术。通过对大红山尾矿库地基处理,结果表明采用高真空击密法对尾砂库的处理效果较好,取得了良好的社会及经济效益,为尾砂库的地基处理提供了一定工程经验和指导。

Tailing sand consists of fine sand and other fine-grained material from the mining wastes.The tailing sand discharged in to the tailing reservoir in the form of slurry and the engineering properties of this solid deposit have the characteristics of high moisture content,high void ratio.A new soil improvement method,which is the combination of point-well dewatering and dynamic compaction,is introduced in this paper.This method has the advantages of short construction period and cost effective.This paper presents the soil improvement results of tailing sands in Dahongshan tailing reservoir.The site in-situ tests and monitoring results indicated that this is a very effective soil improvement method for the tailing sand materials.The project won the national first-grade award in the geotechnical investigation QC group.