中国岩溶2017，Vol.36Issue(6)：842-850,9.DOI:10.11932/karst20170607
疏干排水矿区闭坑后岩溶塌陷形成机理探索——以湘中地区恩口煤矿为例
Formation mechanism of karst collapse after mine closure:A case study of Enkou coal mine in central Hu'nan Province
摘要
Abstract
Groundwater level has raised and the ground collapse often occurred in Enkou coal mine since the mine ceased operation 20 years ago.In order to understand the formation mechanism of the karst collapse and to conceptualize the collapse models due to the recovery of water level,in this paper,spatial and tempo-ral distribution of the karst collapses and associated soil structure in the mine area were discussed,with focus on the analysis of the relationship between the occurrence of karst collapses and the groundwater level recov-ery,from which it is realized that the formation and the modes of the karst collapses have experienced two phases,i.e.during and after the mine water level rebounce.In phase 1,the main karst collapse mode is a water floating-soil softening process,in which the ground collapses occurred obviously less than that in the mine drainage process;the occurrence of the collapses was highly related to the karstic earth caves formed by the process of underground mining and drainage.In phase 2,the ground collapse were dominated by suffos-ion-buckling process,which was caused by the natural fluctuation of the groundwater level between rock and soil,with the hazards occurred sporadically.The study of Enkou coal mine karst collapses,can bring values to scientific,economical and viable suggestions in relation to the prevention and treatment of the geological hazards in Loudi City.Meanwhile,it provides a reference for karst collapse prediction and remediation in similar areas in central Hu'nan Province.关键词
闭坑矿山/水位恢复/浮托—软化致塌模式/基坑突涌条件公式/易发性与危险性评价/防治区划Key words
closed mines/water level recovery/floating-softening model of collapse/condition formula of water inrush in foundation pit/evaluation of vulnerability and risk/prevention and control division分类
天文与地球科学引用本文复制引用
刘新建,郭杰华,陈英姿..疏干排水矿区闭坑后岩溶塌陷形成机理探索——以湘中地区恩口煤矿为例[J].中国岩溶,2017,36(6):842-850,9.基金项目
中国地质调查项目(DD20160254) （DD20160254）
