长平井田陷落柱发育程度及形成主控因素研究

Study on Development Degree of Collapse Column in Changping Mine and Major Controlling Factors for Its Formation

通过分形理论确定了长平井田陷落柱发育的相似维,并按相似维大小将井田划分为陷落柱欠发育区、中等发育区和广泛发育区。长平井田岩溶陷落柱形成主控因素有3个:可溶性岩石、地质构造运动及中生代晚期构造热事件。中生代晚期构造热事件从增强奥灰岩层地下水径流强度和溶蚀性2方面促成陷落柱在井田西部较东部更发育,向斜轴部集中分布的特点。

The similar dimension of collapse column development in Changping Mine was determined by fractal theory, and according to the similar dimension size, Changping Mine was divided into owe develop area, secondary development area and extensive development area. There were three major controlling factors for forming collapse column in Changping Mine： soluble rocks, geological tectonic movement and late Mesozoic tectonic heat event. The late Mesozoic tectonic heat event makes the collapse column characteristics more developed in the west of Changping Mine than that in the east area and concentrated distribution in the syncline axis by enhancing both the runoff strength and corrosion resistance of Ordovician limestone groundwater.