矿井突水地质构造富水性的探查技术

岩溶陷落柱、断裂、老窑采空区是引起矿井突水的主要地质构造。在对比研究了各种物探方法应用条件的基础上,采用三维地震查明地质构造的类型、大小及分布范围,利用瞬变电磁法和SYT电磁测深技术探查构造的富水性。研究表明,地层的富水性与其视电阻率大小具有一定的相关性,富水的地层视电阻率值较低,反之视电阻率较高。根据横向和纵向电阻率等值线图分析地质构造的富水性,为矿井突水危险评价提供地质依据。淮南矿区突水地质构造探测结果显示:在探测区内发育两个陷落柱,西北部的陷落柱无水,东部陷落柱富水程度高。实际巷道揭露资料与探测结果基本吻合,该物探方法组合不失为探查地质构造富水性的一种有效手段。

The Prospecting Technology for Water Enrichment of Water - inrush Geological Structure in Mine

Karst collapse column, fracture, gob area are the main geologic structures that causing the mining water inrush. Through the comparing research on the application of every kinds of geophysical prospecting, the 3 D seismic exploration is adopted to find out the type, size, and distribution of water inrush geological struc-ture, and the transient electromagnetic method and SYT electromagnetic sounding method is used to prospect the watery feature of water inrush structure. The research suggests that the formation water abundance is rela-tive to the size of the apparent resistivity, the watery layer has low apparent resistivity while the low and non - watery layer have high apparent resistivity. The water enrichment of geological structure was analyzed accord-ing to horizontal and longitudinal apparent resistivity contour map. This study will provide geological basis for danger evaluation of water inrush. The prospecting results in Huainan mining area suggest that there are two collapse columns in the detection region, the northwest collapse column is free from water and the east one is high with water. The actual laneway shows the data is coincide with the prospecting results, which provides a efficient integrated geophysical method for prospecting the water enrichment of geological structure.