淮北祁南井田瓦斯赋存规律及影响因素分析  

Coalmine Gas Hosting Pattern and Influencing Factor Analysis in Qinan Coalmine, Huaibei Area

作　　者：张春光[1] 姜波[1] 朱慎刚[2] 李长贵[1] 

机构地区：[1]中国矿业大学资源与地球科学学院,江苏徐州221116 [2]淮北矿业集团公司祁南煤矿,安徽宿州234115

出　　处：《中国煤炭地质》2010年第1期27-31,共5页Coal Geology of China

基　　金：国家自然科学基金(40672101)资助项目

摘　　要：在系统分析矿井地质资料的基础上,结合矿井瓦斯实测参数,以区域构造演化和矿井构造的控制作用为主线,探讨了祁南矿煤层的瓦斯赋存规律及其控制因素。结果表明,本区受宿南向斜的控制,煤层瓦斯分布具有南高北低、东高西低、东南部最高的总体规律;宿南向斜转折端部位由于放射状正断层的发育,瓦斯含量相对较低。井田中部逆断层发育的次级褶皱区域,瓦斯含量相对较高;在-900m以浅,瓦斯含量与煤层埋深、煤级均表现出较好的正相关关系;较高的顶底板泥岩比例和半封闭的水文地质条件为瓦斯的保存提供了有利条件;Ⅱ、Ⅲ类煤厚度所占比例小于20%,渗透率大于1mD,表明煤层瓦斯具备较好的运移条件。Based on systematic analysis of mine geological data, combined with measured parameters of mine gas, with the mainline of regional tectonic evolution and mine structural control actions, discussed coal seam gas hosting pattern and its controlling factors in depth. The results showed that： due to controlled by the Sunan syncline, the coal seam gas has a general distribution pattern of higher in south than north, east than west and highest in the southeast. Lower gas content in the synclinal turning part is because of developed radiating normal faults. Reversed fault developed secondary folding area in the middle minefield has relatively higher gas content. Above the -900m elevation, better positive correlation is existed between gas content and coal seam buried depth, coal rank. Higher roof and floor mudstone proportion and semi-enclosed hydrogeological condition provide advantage for gas preservation. The proportion of category Ⅱ and Ⅲ coals account for not more than 20% and permeability larger than lm per day have demonstrated that the coal seam gas has better migratory conditions.

关 键 词：祁南矿 瓦斯 赋存规律 影响因素 

分 类 号：TD712.2[矿业工程—矿井通风与安全]