窑街煤田为祁连山东南段的山间盆地,煤田为一小型复背斜构造,煤系地层为中下侏罗纪。煤层倾角在浅部一般为9～15度,深部倾角大,一般在42度左右,最大60～90度,东北部有倒转现象。煤田内可采煤层有三层,自上而下为煤一层,厚度0.19～4.51米,平均2米,顶板为铝质泥岩,底板为油页岩,距煤二层9.10～12.40米;煤二层厚度0.30～98.17米,平均 The Yaokuan coalfield is a mountain basin in the southeast part of the Qilian Mountains. The coalfield is a small complex anticlinal structure and the coal measures strata are middle-lower Jurassic. Seam angle in the shallow part is generally 9 ~ 15 degrees, deep dip angle, generally about 42 degrees, the maximum 60 to 90 degrees, the northeast has a reversal phenomenon. Coal mining within the coal seam has three layers, from top to bottom for the coal layer, the thickness of 0.19 ~ 4.51 meters, an average of 2 meters, the roof of aluminum mudstone, the bottom of the oil shale, from the second floor 9.10 to 12.40 meters of coal; coal Layer thickness of 0.30 to 98.17 meters, on average