It is one of the main recoverable coal seams of the Taiyuan Formation. Located at the lower part of No. 4 coal seam, the distance from No. 4 coal seam is about 0.80-36.40m, with an average of 15.43m. The No. 6 coal seam has large thickness and small change in the mine area, and the coal seam in the whole mine field is stable. It is another major recoverable coal seam in the coal system strata of the Taiyuan Formation of this mine. The roof lithology is dominated by fine-grained sandstone-sandstone mudstone, sometimes carbonaceous mudstone, and the old roof is sandstone; bottom-bed sandy mudstone-fine-grain sandstone goaf: the basic goaf of No. 6 coal seam in the eastern mine field