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运用灰色系统理论中的建模预测方法，建立了韩城矿区北部三个井田主采3#煤层甲烷含量的预测数学模型，经实际误差检验，精度合乎要求。
By using the modeling and forecasting method in gray system theory, the prediction mathematical model of methane content in No.3 coal seam of the three main minefields in the northern part of Hancheng mining area is established. The actual error test shows that the accuracy is satisfactory.