Gas Bearing Property and Geological Influence Factors of Major Seam in Hongmei Exploration Area of Western Guizhou

Based on the investigation on the distribution law of the gas content property in No.23 major seam of Hongmei Exploration Area in Zhuzang syncline, fro m the structure, seam thickness, buried depth;roof and floorlithology, hydrology conditions and other aspects, the geological factors influenced to the seam gas content were analyzed.The study showed that the seam content would have the distribution features of high in south part, low in the north part, high in axis part and low in two wings and had features of syncline controlled gas. The seam buried depth was shallow and the gas content was relatively high.The depth of the seam air weathered zon e was not over 150 m.With the seam thickness increased, the gas content would be reduced in tendency.The study held that the structure and hydrological conditions W ere the main factors affected to the seam gas content in the Hongmei Exploration Area and the seam and roof and floor sedimentation environment in certain degree co uld have the influences to the seam content occurred.