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1983年5月4日,某矿风井石门基建施工时发生一起预兆不明显,持续时间短,破坏力大的泥石流溃入事故,造成重大伤亡。 (一)事故地段水文地质简况 该矿床位于侵蚀基准面以下。矿区三面环山成簸箕状向西开口,地形有利于降水汇集。其充水岩层主要为矿体底板裂隙一岩溶化大理岩,且与区域岩溶含水层相连。矿床属水文地质条件中等的弱裂隙一岩溶化矿床。
May 4, 1983, a mine shaft mine Shimen construction occurred in an improper omen, short duration, destructive debris flow into the accident, causing heavy casualties. (A) Hydrogeological Profile of the accident area The deposit is located below the erosion datum. Mining area surrounded by mountains into dustpan-like opening to the west, the terrain is conducive to precipitation pooling. The water-filled rock is mainly composed of a fissure-karst marble in the ore body floor and is connected with the regional karst aquifer. The deposit belongs to a weakly fractured-karst deposit with medium hydrogeological conditions.