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坦家冲煤矿含煤地层为上二叠系龙潭组上部含煤段(P2L2),含煤7层,3煤层局部可采,6煤层全井可采,为本矿井的主要可采煤层。6煤层底板褶曲发育,煤层厚度变化大,煤厚0.52-17.7米,可采指数97.6%,变异系数84.2%,属于不稳定煤层。
The coal-bearing strata of Tanjiachong Mine are upper coal-bearing segment (P2L2) of Longtan Formation of Upper Permian. Coal-bearing strata of 7th coal seam and 3th coal seam are locally recoverable. Fully-recoverable 6th coal seam is the main recoverable coal seam of this mine. 6 The floor of the coal seam is developed with folds and the thickness of the coal seam varies greatly. The coal thickness is 0.52-17.7 meters, the index of recoverable is 97.6% and the coefficient of variation is 84.2%, which belongs to the unstable coal seam.