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韩城矿区三号煤层属于二迭纪下二迭统山西组陆相沉积,沉积厚度一般为115米,中下部为含煤段,含煤1～5层,可采煤层2~#、3~#煤,其它煤层不可开采或以煤线出现,2~#煤层局部可采,3~#煤层为全区主采煤层。三号煤层两极厚度0.2～20.40米,一般厚度6.0～8.0米,煤层倾角除边浅部变化较大外,中深部一般为3°～7°,煤层松软,硬度小,结构比较简单,局部含有1～2层夹矸,岩性以炭质泥岩、砂质泥岩为主,其次为粉砂岩,厚度在0.05～2.5米,经工作面内探煤厚及钻孔证实上分层夹矸少见,但上分层夹矸一般比较厚,厚度在0.5～2.5米,
The No. 3 coal seam in Hancheng Mine belongs to the continental deposition of the Lower Permian Shanxi Formation in the Permian. The sedimentary thickness is generally 115 meters. The middle and lower parts are coal-bearing sections with 1 ~ 5 layers of coal and 2 ~ #, 3 ~ # Coal, other coal seams can not be mined or coal line appears, 2 ~ # seam recoverable locally, 3 ~ # seam for the main coal seam. The seam thickness of No. 3 coal seam is 0.2 ~ 20.40 meters and the general thickness is 6.0 ~ 8.0 meters. The dip of coal seam varies greatly except the shallow part of the seam, while the middle and deep parts are generally 3 ° ~ 7 °. The coal seam is soft and soft with relatively simple structure. 1 to 2 layers of gangue, lithology of carbonaceous mudstone, sandy mudstone, followed by siltstone, the thickness of 0.05 to 2.5 meters, the coal face thickness and drilling confirmed that stratification Gangue rare, But the stratification gangue generally thick, the thickness of 0.5 to 2.5 meters,