矿区四期规划区煤层赋存特征与控煤因素

Occurrence characteristics and coal-controlling factors of coal seams in the fourth planning area of Yushen mining area

通过榆神矿区四期规划资料分析,得出该区侏罗纪含煤岩系延安组煤层赋存特征、发育特征和沉积体系演化。延安组沉积早期主要发育河流沉积,中期为湖泊、三角洲沉积,晚期湖泊逐渐萎缩,河流、三角洲沉积再次占主要地位;延安组的煤层主要发育在三角洲平原沼泽,最有利的成煤的时间段就是湖侵体系域晚期和高位体系域晚期。

By analyzing the fourth planning data in Yushen mining area,the occurrence characteristics,development characteristics and sedimentary system evolution of coal seams in Yan'an formation of Jurassic Period was discussed. The deposition of the Yan'an formation mainly developed fluvial deposits in the early stage,lake and delta deposits in the middle stage,fluvial and delta deposits in the late stage. The coal seams of Yan'an formation are mainly developed in the delta plain marsh area,the most favorable time of coal forming is the late stage of transgressive system tracts and the late stage of highstand system tracts.