桌子山煤田构造控水机理研究

Study on Structural Water Control Mechanism in Zhuozishan Coalfield

查明地质构造对桌子山煤田岩溶地下水的控制规律和矿井突水的影响,基于大量地质原始资料和矿井突水资料,进行理论分析和现场实测。研究表明:桌子山煤田以近南北向的压扭性主构造和东西向的张性次级构造构成立体网格导水体系,地质构造不仅控制着岩溶地下水系统的边界,而且直接影响水动力条件。地质构造越复杂,岩溶裂隙越发育,富水性也越强,西北地区第一例岩溶陷落柱即在此体系内形成。断裂构造与突水点位置联系紧密,中小型突水点多位于东西向小断层附近,中型以上突水点多位于东西向和南北向断层交汇处的地下水强径流带。

In order to investigate influence of the geological tectonic in Zhuozishan Coalfield on the underground water control law and the mine water inrush, the article is based on the large geological original information and mine water inrush information, a theoretical analysis and the site measurement study were conducted. Near south - north compresso - shearing main structures and east - west tense secondary structures made up three - dimensional grid conducting - water system in zhuozishan coalfield where the first case karst collapse column formed in northwest china. Geological structures not only controlled boundaries of karst groundwater system, but also directly affected the groundwater dynamic conditions. The more complex geological structures formed, the more developed karst fissures and the stronger water abundance. The fault structures and the positions of water inrush points have close relations that the middle - small water inrush points located in near the east - west small faults more, but above the middle - small water inrush points located in the groundwater strong runoff zones of the east - west and south - north faults crossing.