摘要
岩溶塌陷是喀斯特地区常见的一种地质灾害,对生活在易发区的居民来说是一个较大的安全隐患。从贵州省德江县大湾岩溶塌陷区的地质环境条件出发,分析了该区岩溶塌陷的形成原因,认为该区产生岩溶塌陷的基本条件为岩溶发育、有一定厚度松散堆积层、地下水水位大幅度下降;诱发原因为人类采矿工程活动。其主要形成机制有隐伏岩溶连通效应、机械潜蚀效应和降水入渗效应。在分析岩溶塌陷成因的基础上,提出了对地下采空进行回填、在地下水补给方向外的其它方向进行灌浆,形成灌浆帷幕等防治措施。
The karst collapse is a common geological hazard in karst region, and a major safety potential for residents who live in the susceptible area. Start from the geological environment of the karst collapse region in Dawan, Dejiang County, Guizhou Province, analyzed the formation of karst collapse, and considered that the basic conditions of karst collapse have： developed karst, certain thickness of loose beds, substantially lowering of groundwater level, while the inducing agent is mining activities. The main formation mechanisms have effects of hidden karstic intercommunication, mechanical suffusion and precipitation infiltration. Based on karst collapse genetic analysis, controlling measures of gob area back filling, omnidirectional grouting other than the direction of gToundwater recharge, formation of grouting curtain etc put forward.
出处
《中国煤炭地质》
2011年第6期28-32,共5页
Coal Geology of China
关键词
岩溶塌陷
成因
基本条件
形成机制
防治措施
karst collapse
genesis
basic condition
formation mechanism
controlling measures
