以9煤层为例，从平面上对乌达矿区主采煤层的可选性及其聚煤环境进行了讨论.结果表明，乌达矿区主采煤层的可选性在平面上分布的差异较大，这受控于泥炭聚积时的古环境.低位泥炭沼泽由于潜水位较高，水流对泥炭沼泽表面的改造和冲刷作用较强，形成的煤层具有较高的凝胶化指数(IG)和地下水流动指数(IGW)，并且与精煤产率呈负相关，煤中粘土矿物和黄铁矿难以洗选；高位泥炭沼泽形成的煤层具有较低的凝胶化指数(IG)和地下水流动指数(IGW)，泥炭积累速度较快，其精煤的产率较高. Taking the 9 coal seam as an example, the feasibility of the main coal seams in Wuda mining area and its coal accumulation environment are discussed from the plane.The results show that the difference of the selectivities of the main coal seams in the Wuda mining area in the plane Which is controlled by the paleoenvironment during the peat accumulation.The lower peat swamp, due to the higher phreatic water level, has stronger remoulding and scouring effects on the surface of the peat swamp and the formed coal seam has a higher gelation index (I G) and groundwater flow index (IGW), and was negatively correlated with the yield of clean coal, which was difficult to wash with clay minerals and pyrite in coal; the coal layer formed by high peat swamp had lower gelation index (IG) and groundwater flow index (IGW), peat accumulation rate is faster, and the yield of clean coal is higher.