Effects Of Coal Metamorphism Degree On Gas In Yongshanqiao Mining Area, Jiangxi Province

The gas is produced in the coal metamorphism process, it stored in coal seam and surrounding rock, inflammable, explosive, colorless and odorless, it is the biggest threat to the mine production and workers'life safety. At present, as mines improve, mining depth, the threat of increased gas disasters are getting more and more serious. Yongshanqiao mining area is the most serious mine gas disasters in jiangxi province, but the research about gas is very weak.This article through a large collection of mining area's exploration drilling date, use mine statistics method to research mining coal metamorphism degree distribution trend; And by using regression analysis of volatile and will coal gas content to make connections, study the effect of mining area coal metamorphism degree on gas; Finally, according the coal metamorphism to discuss the main metamorphic types of mining area.This study based on theory of gas geology tectonic evolution theory, control theory of structure, use mine statistics, linear regression analysis method study the effect of coal metamorphism degree on gas in Yongshanqiao mining area, the research result indicates that:1.Yongshanqiao mining area coal metamorphism degree has zoning. In horizontally from east to west, mining coal metamorphism degree is higher; In vertical buried depth of coal seams, along with increased, coal metamorphism degree also increased.2.The same in coal seam under the premise of the buried depth, the Vdaf and coal gas content exists negative correlation, with the Vdaf lower, the gas content scores, namely the higher gas content with coal metamorphism degree of heighten increase.3. Magma metamorphism is the main effect factor of coal metamorphism degree in Yongshanqiao mining area, and according to mine coal metamorphism degree trend, predicting mining erea peripheral has widespread magmatic rock.Figure [13] Table [13] Reference [53]...