淮南寒武纪岩溶陷落柱发育特征及导水性分析

Morphological Characters and hydrological geology Characters of Cambrian Karstic Collapse Column in Kongji Mining Area Huainan

1996年任楼煤矿发生的陷落柱特大突水事故,使“淮南不存在岩溶陷落柱”的认识得到了质疑。通过初步调研,在孔集矿南部的孙家大山一带发现出露于地表的岩溶陷落柱,而谢桥矿煤经三维地震勘探也探测出了发育于寒武纪灰岩中的两个岩溶陷落柱。因其岩溶陷落柱的发育层位、充填物质与华北煤田奥陶纪岩溶陷落柱构成明显的对比,导致了其水文、工程地质特征的特殊性。

Two karstic collapse columns like geological anomalous bodies were found through three-dimensional seismic exploration in Xieqiao mining area in 2004. They are affirmed karstic collapse columns by expert group latter. Through preliminary investigation into the fundamental geographic and geologie conditions of karst development, the development possibility of collapse column in ttuainan is worked out. And found karstic collapses are cropped out on surface in south of Kongji mining area. Their development horizons, fillings and collapse characters are quite different from that of collapse columns found in typical North China coalfields, and result in the particularity of hydrogeological and engineering geological characters. Through exploration and observations of the collapse columns in Xieqiao and Kongji mining area, the hydrogeologic characters such as the filling characters, contact relations with wall rock, water abundance and water transmissibility et al are deduced and summed up.