Study On Gas Geological Law And Mapping In Gongchang Mining Area

In this paper, taking Gongchang mining area for the study, using gas geology theories, combined with the mine production in Gongchang mining area of site test revealed amount addimg, gas content and gas pressure data, using the method of gas and geology woven graph, studied geology tectonic evolution and the control of gas occurrence and forecast the coalbed gas content, emission, and coal and gas outburst dangerous, compiled the C8 coal seam gas geology map of Gongchang mining area.The overall characteristics of gas occurrence in this area by the NWW anticline of the Gongchang, anticline from the two wings of the anticline axis, gas content increase with the depth of coal seam increased. The north wing of Long Gong anticline has a dip angle, it conducive to gas release, and the south wing strata gently dip a small coal is not conducive to gas release. Obvious characteristics of Gongchang mining area controlled by structures, Good gas storage in synclinal axis, the gas content was significantly higher than the adjacent region.In this article, Gongchang mining area is divided into four segments, respectively analyzed gas geology regularity. Furong ore mine which section of the eastern end of the controlling factors for the gas content in coal seam burial depth, and its correlation coefficient is 0.95, wind-oxide area with 73 ~ 100m depth. The western end of the Gusong mine ore block gas content gradient is 3.87m~3/t/100m. In Gongchang mining area, the south wing coal seam dip angle is less than the north wing. Finally, the amount of gas resource in mining area is 1338.66×108m~3, the average resource abundance is 1.39×10~8m~3/km~2.