铜陵市岩溶塌陷地质灾害特征及发育规律

Characteristics and Development Regularity of Geological Disasters in Tongling City

铜陵地区经历了复杂的构造演化、岩浆活动,在地质条件和矿产开发的双重作用下,岩溶塌陷地质灾害发育强烈,并在各类地质灾害中占据主导地位。基于铜陵地区以往岩溶塌陷地质资料,统计了地质灾害发育规模、形态、时空分布特征,总结了发育规律,对典型岩溶塌陷地质灾害点进行了剖析。研究结果表明:T1n、P1q碳酸盐岩地层与构造交汇部位、侵入岩界面硫化矿床分布区是岩溶塌陷地质灾害主要发生位置,矿山疏排水等造成地下水位变化是岩溶塌陷地质灾害的主要诱发因素,今后工程建设应避开岩溶塌陷地质灾害易发位置,并加强地下水抽排的论证和管理。

Tongling area has experienced complex tectonic evolution and magma activities.Under the dual action of geological conditions and mineral development,karst collapse geological disasters have devel⁃oped strongly,and occupy a dominant position in all kinds of geological disasters.Based on previous geologi⁃cal data of karst collapse in the Tongling area,the development scale,morphology,and spatiotemporal dis⁃tribution characteristics of geological disasters were statistically analyzed.The development regularities were summarized,and typical karst collapse geological disaster points were analyzed.The research results show that the intersection of T1n and P1q carbonate rock strata and structures,and the distribution area of sulfide deposits at the intrusive rock interface are the main locations of karst collapse geological disasters.The change of groundwater level caused by mine drainage is the main inducing factor of karst collapse geological disasters.In the future,engineering construction should avoid the prone locations of karst collapse geologi⁃cal disasters,and strengthen the demonstration and management of groundwater pumping.