Exploration of overlying goaf water of coal seam based on transient electromagnetic method in coal mine
In order to know the water enrichment conditions of the overlying goaf of the 4-3 coal seam on the 431303 working face in a coal mine of Shenmu,Shaanxi,the roof water-bearing characteristics is explored using transient electromagnet method in the mine roadway.Based on the existing geologic and hydrology characteristics,working parameters are reasonably designed for high quality data,and the medium electrical structure at the range of 100 m above the roadway roof is obtained by full spatial data processing.According to the geophysical characteristics of electrical differences in the coal seam,sur-rounding rock,fracture zone and water enrichment area,three sites of abnormal goaf water are determined,which is verified during drilling exploration.Practical experience shows that reliable results for exploring the goaf water is achieved using the aforementioned method by reasonably designing construction parameters,and strictly collecting and processing data.
万方数据
维普
