摘要
湘中地区分布许多含煤向斜盆地,煤田开采过程中由于突水及疏排地下水引起岩溶塌陷,产生了一系列环境地质问题。斗笠山矿区为一不规则的三角形复式向斜汇水盆地,水文地质务件复杂,本区构成了五个塌陷带。文章对五个塌陷带的地质构造进行了研究,早二叠世末期的东吴运动,在区内对古岩溶的控制十分明显。地质构造复杂地段,往往是岩溶异常发育地带。斗笠山向斜西南翼处于斗笠山向斜转折端,岩溶塌陷发育,斗笠山煤矿泉塘一带,既是多条断裂交汇处,又是次级背斜轴部和倾伏端,密集的构造使岩层破碎和裂隙发育,岩溶塌陷发育强烈。
There are developed many coal-bearing synclinal basins in the center of Hunan Province, during the exploitation of the coalfield, karst collapse was caused by water bursting and drainage, arousing a series of environmentally geological problems. The Doulishan coal-mining district is an irregular triangle compound synclinal basin with a complex hydrogeologic setting. There are five karst collapse belts in the coal-mining district. The paper studies the geological structures of these five karst collapse belts. The Dongwu movement controlled the development of paleokarst. Karst development anomalies occur usually in the areas with complex geologic structures. The southwest limb of the Doulishan syncline is situated at the turning point of the Doulishan syncline and karst collapse is developed there. Quantang unit in the Doulishan coal mining district is not only the location of convergence of many faults, but also the axial region and plunging end, close-spaced structures led to rock fragmentation and fracture development, so karst collapses are developed intensively there.
出处
《地球与环境》
CAS
CSCD
北大核心
2005年第B10期247-250,共4页
Earth and Environment
基金
国家安全生产监督管理局安全生产科技发展指导性计划项目(04-235)
关键词
岩溶塌陷
地质构造
环境地质
斗笠山煤矿
karst collapse
geologic structure
environmental geology
Doulishan coal mining district
