Research On Gas Distribution And Gas Outburst Prediction Of Tianchi Coal Mine

With the development of Chinese mining industry, the depth and intensity of coal mining are growing, and the geological conditions become more and more complex, doubling the amount of gas emission become a bottleneck to restricting the production, gas treatment has become a mine safety management in the re-weight. Therefore, it is an important practical to guide the design of mine ventilation and mining deployment, and adopt targeted measures for prevention and treatment of gas from the geological perspective to researching the geological conditions of gas generation, occurrence and migration, finding the geological factors affecting the distribution of gas, carrying out the gas geological zoning, forecasting the danger of the coal sea,The main coal mining in Tianchi Energy Company of Limited (coal) in Heshun County, Shanxi Province are the 15 and 3 coal-seams, the mine is a high-gas coal mine. The stress, gas content and gas pressure increase with to the deep extension of the 15 coal-seam; In the process of excavating, there are top drill, spray holes and other dynamic phenomena etc, coal and gas outburst has become the major security problems in the company. Therefore, it is necessary to research the 15 coal seam. In this paper, the gas distribution of the Tianchi Coal Mine is discussed, including geological structure, coal thickness, coal rock, burial depth and other factors on the occurrence and distribution of gas, the results show that: the gas occurrence and distribution of 15 coal seam has the features of regional and sub-band, this imbalance is impacted by the difference of geological conditions. Predicting the risk of the prominent coal by using single index method and the comprehensive index, combined with gas geological techniques and methods, and the geological zoning is carried out. By collecting and collating a great deal of data about gas geology from Tianchi mine, a series of related geological maps of gas are drawn with AutoCAD2004, Surfer and Grapher mapping software. These maps include contour of coal seam thickness, the burial depth of coal seam, the gas content etc. According to the analysis about gas geology of the studied coal-seam, the formal gas-geology map which contain the contour of gas content, gas pressure, gas content point, gas pressure points, outburst zones is drawn.