Influence and Mechanism of Geological Structure on the Occurrence of Coalbed Methane
The main factor affecting the gas content of coal seams is the geological structure,and different types of geological structures have different effects on the gas content of coal seams.In order to investigate the main controlling factors of the gas content of 3#coal seam in Yechuan Coal Mine and the effect of different geological formations on the gas control of coal seams,the types and numbers of geological formations in Yechuan Coal Mine were analyzed,and samples of coal seams near different geological formations at different burial depths were sampled and analyzed by using geological drilling holes.The results show that the main controlling factor of coal seam gas content is the burial depth of the coal seam,and the gas content tends to increase with the increase of the burial depth.Geological formations have an effect on the local area of coal seam gas storage,and it is easy to form natural gas-rich zones in the axial part of the inclined slope and the axial part of the backslope,and the gas quantity is higher than the normal level.
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