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| Analysis of gas geological characteristics of Dingxin
Coal Mine in Tongchuan Mining Area |
| Chen Lin |
| 325 Geological Team of Anhui Provincial Bureau of Geology and Mineral Exploration, Huaibei 235000, China |
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Abstract The continuous evaluation of gas geological conditions is one of the important tasks in mine geological work. Based on the gas and related data of geological exploration and underground monitoring, this paper comprehensively analyzes the characteristics of gas occurrence and underground gas emission in Dingxin Coal Mine, and discusses the related geological factors affecting gas content and emission. The results show that the gas content of the main coal seam is low. The average gas content of No.5 and No.10 coal seams is 0.28 m3/t and 0.5 m3/t, respectively. The gas composition is mainly N2, and the coal measures are located within the gas weathering zone. The main factors affecting gas occurrence include the lithology of coal seam roof and floor, geological structure and coal seam burial depth. The gas emission mainly comes from the coal mining face, followed by the tunneling face and the goaf. Dingxin Coal Mine in Tongchuan Mining Area belongs to the low gas mine. The geological factors affecting mine gas emission mainly include gas content, geological structure, groundwater, coal mining technology and mining intensity.
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