潘三矿13-1煤层瓦斯赋存规律及影响因素分析

Analysis of regularity and it's influencing factors of gas occurrence in seam 13-1 of Pansan Mine

通过对潘三矿地质构造、地质勘探钻孔与采掘工作面实测瓦斯含量以及影响煤层瓦斯赋存因素的分析,研究了矿井13-1煤层瓦斯赋存规律。结果表明:井田瓦斯分布具有分区分带的特点,瓦斯风化带与瓦斯带分界明显,瓦斯带瓦斯分布呈现出北低南高、东高西低规律。根据井田地质构造特征及煤层瓦斯运移与保存条件,可划分为3个瓦斯地质单元,各瓦斯地质单元瓦斯含量随埋藏深度增加而增加,具有明显的正相关关系,控制瓦斯分布的因素主要有埋藏深度、地质构造、围岩性质、构造煤等。

Analysis of the geological structures,geological exploration drilling,gas content measured at working faces and factors influencing gas occurrence revels the regularity of gas occurrence in seam 13-1.It indicates that the gas occurrence in the minefield varies from zone to zone with a clear boundary between the gas weathered zone and the gas zone.Gas content tends to be higher in the eastern and southern parts of the gas zone and lower in the western and northern parts.The minefield may be divided into 3 gas geological units in light of the minefield＇s geological features and conditions for gas migration and storage in the seam.The gas content in each gas geological unit presents a clear positive correlation with the buried depth-the greater the depth the higher the gas content.Main factors influencing gas distribution include buried depth,geological structure,characteristics of wall rock,deformed coal,etc.