永城煤田城郊矿区,位于华北晚古生代聚煤区的东南缘,面积达200平方公里。矿区地层及煤层与予西、苏北、淮北均可对比,与予西的主要区别是:①予西石炭系一煤组含煤七～九层,部分煤层如一__1、一_4煤层可采,而本区含煤九～十五层,均无可采点。②予西主要可采煤层为山西组二_1煤层,二_2煤层不可采;而本区主要可采煤层为二_2煤层, Yongcheng coalfield suburban mining area, located in the northern margin of the Paleozoic coal accumulation in Southeast China, an area of ​​200 square kilometers. The strata and coal seams in the mining area can be compared with those in the west, north and north of Huaibei. The main differences from the west to the west are: (1) Mining, and nine coal in this area fifteen, no point can be adopted. (2) The main recoverable coal seam in West China is Shanxi Formation II-1 coal seam, II-2 coal seam is not recoverable; while the main recoverable coal seam in this area is II-2 coal seam,