摘要
以构造为主线,结合岩性、地下径流等分析了西山煤田陷落柱形成之主控因素,认为陷落柱在形成中,地质构造决定了陷落柱形态与分布规律,地层岩性组合是岩溶发育的物质基础;以构造应力为出发点,结合重力、真空负压等作用进行研究,认为陷落柱具有多种成因机制。
Mainly based on tectonic structure, lithology and groundwater runoff, this paper analyses the decisive factors that determine the forming of collapse columns in the Xishan coal field. In the course of a very long geological history, most Karst collapse columns came into being under the influence of the tectonic structure in Yanshan period. The shape and distribution of the karst collapse columns are determined by the local geological structures. While the combination of stratum structure and lithological nature is the material basis for the development of karst which provides the possibility of formation of the initial hollow spaces in collapse columns. And the tectonic stress, gravitational force and negative pressure resulting from vacuum are also some of the multiple factors leading the formation of collapse columns.
出处
《中国煤炭》
北大核心
2009年第10期83-87,共5页
China Coal
关键词
陷落柱
构造运动
岩性组合
塌陷机理
collapse columns
tectonic movement
lithological combination
subsidence mechanism
