潞安矿区古城煤矿煤层气赋存主要地质因素分析

Gucheng Coalmine CBM Hosting Main Geological Factors Analysis inLu’an Mining Area

古城煤矿位于山西省潞安矿区中西部,是潞安集团近期重要的煤炭接替矿井。前期煤田勘查揭示该矿区煤层含气量较高,具有较好的煤层气资源开发潜力。以矿区煤田及煤层气地质资料为依据,结合区域和周边矿井煤层气勘探和开发成果,探讨影响该矿井煤层气赋存和富集的基本地质条件。研究表明,控制煤矿区煤层气分布的主要因素是构造,其中向斜核部是煤层气赋存、富集的有利部位;此外,本区煤层气分布还受断层影响,断层性质不同,对煤层气的赋存、富集影响不同,本区除了少数逆断层是煤层气富集的边界条件之外,多数正断层对煤层气的保存具有破坏作用。

The Gucheng coalmine is situated in the Midwest of Lu’an mining area,Shanxi Province.It is an important recent coal exploitation succession mine of the Lu an mining Group.Earlier coalfield exploration revealed coal seams in the area have higher gas content with better CBM exploitation potential.Based on coalmine area coal and CBM geological data combined with regional and peripheral coalmines CBM exploration and exploitation results have discussed the fundamental geological conditions impact coalmine CBM hosting and enrichment.The study has shown that the main factor to control CBM distribution is structures,the syncline core is favorable position for CBM hosting and enrichment.Besides,CBM distribution has impacted by faults,different faults have different impacts,except few reverse faults can be CBM enrichment boundary condition,and most normal faults have damaging effects on CBM preservation.