基于黔西珠藏向斜红梅勘探区23号主煤层含气性的分布规律,从构造、煤层厚度、埋深、顶底板岩性、水文地质条件等方面分析了影响该煤层含气性的地质因素。研究发现:煤层含气量具有"南部高、北部低,轴部高、两翼低"的分布特点,表现出向斜控气的特征;煤层埋藏浅但含气量相对较高,煤层气风化带深度不超过150 m;煤层厚度增大,含气量趋于减小。研究认为:构造和水文地质条件是影响该勘察区煤层含气量的主要因素,煤层及其顶板沉积环境也在一定程度上对煤层含气量产生了影响。

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.

国家自然科学基金重点资助项目(40730422)；