The Prediction Ofgas Emission And Outburst Danger Of No.2 3 Coal Seam In Baijigou Coal Mine

Baijigou mine belongs to the gas of the mine as mine to deep mining coal seam gas content is more and more big, the gas problem has become the mine safety production and high production and efficiency are the main factors that play. The Therefore, a comprehensive analysis and study of Baijigou mine gas occurrence regularity, to carry out the mine gas emission prediction and coal seam outburst danger prediction, to guide the mine gas drainage in advance. focusing on prevention and control and gas explosion accident prevention has important guiding significance.In this paper, by using the theory and method of gas geology, collecting, sorting and analyzing the mine geological data, geological exploration stage and production stage of Baijigou mine 2 3 layer reservoir geological characteristics, summarizes the time-space distribution law of coal seam gas, analyzes the influence factors of gas occurrence, forecast the gas emission of the mines, mining and coal seam highlight the danger, the main achievements are as follows:(1) 23 coal seam is the main coal seam in Baijigou coal mine, coal seam thickness of 0? 29.36m, the average thickness of 13.93m, the coal bed is stable, simple to complex structure.Macrolithotype the bright semibright coal, low ash, low sulfur and high quality anthracite,coal structure is class ? cloddy pulverescent structure of coal pore structure with small pore and permeability of coal seam is as high as 76.05 ? 209.10md, the permeability is very good.The permeability of coal seam is very- sensitive to the crustal stress, and the permeability of coal reservoir decreases with the increase of original ground stress.(2) summed up the occurrence characteristics of gas content in 2 3 seam, analyzed the control factors affecting gas content, and predicted the gas content in deep coal seam.using the method of divided source prediction.(4) according to the bad type of coal, the initial velocity of gas emission, the coefficient of solidity of coal seam and the gas pressure of coal seam, it is predicted that the 23 coal seams do not have the prominent risk.