Gas enrichment area identification methods by the overlying bedrock characteristic for Zhaogu No. 1 Coal Mine
Abstract：In order to effectively control gas unbalance phenomenon of gas occurrence in coal mine, this paper put for- ward the concept of gas enrichment area and gave the general characteristics of gas enrichment area. Based on geolog- ical condition in Zhaogu No. 1 Coal Mine, the paper discussed the gas geological features and analyzed the formation mechanism of gas enrichment area in the thick loess-thin bedrock coal seam, and then obtained the recognition method of gas enrichment area by the overlying bedrock characteristic of coal seam. On the basis of which, the gas enrichment area of Zhaogu No. 1 Coal Mine was confirmed, that was the bedrock layer thickness greater than 50 m and coal seam overlying bedrock gradient greater than 0.06 or the bedrock layer thickness greater than 150 m area. Coal mining prac- tice verified gas enrichment area identification and actual gas occurrence consistency.
Keywords：gas enrichment areagas geologybedrock characteristicgas content
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 1315-1319 )