宣威市格宜向斜南东翼北段宣威组煤层特征浅析

Analysis on Coal Seam Characteristics of Xuanwei Formation in the North Section of the South East Wing of Geyi Syncline in Xuanwei City

通过钻孔岩芯观察、物探测井、化验测试等方法,对宣威组地层含煤性、煤层地球物理特征、煤质特征进行分析,确立该地区煤层的赋存规律、煤层对比的可靠度。结果表明:区内可采煤层赋存于宣威组地层,该地层厚度稳定,含煤层数多达35层,其中含可采煤层9层;可采煤层主要集中于宣威组上段,上段含可采煤层7层,含煤系数高达5.91%;区内煤类属焦煤,煤层硫分含量属特低硫,灰分属中—高灰。

Through borehole core observation,material detection well and laboratory test,the coal bearing property,geophysical characteristics and coal quality characteristics of Xuanwei Formation were an⁃alyzed to establish the occurrence law of coal seam and the reliability of coal seam correlation in this area.The results show that the mineable coal seams in the area are located in the Xuanwei Formation.The thick⁃ness of the stratum is stable.There are as many as 35 coal-bearing seams,including 9 mineable coal seams.The minable coal seam is mainly concentrated in the upper section of Xuanwei Formation,and the upper section contains 7 layers of minable coal seam,with a coal-bearing coefficient of 5.91%.Coal in the area belongs to coking coal,coal seam sulfur content belongs to very low sulfur,ash belongs to medium high ash.