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运用灰色系统理论，对煤矿采掘工作面的瓦斯涌出变化进行了分析，建立了不同深度及掘进过程中的瓦斯预测（ＧＭ）模型，经检验对比，灰色预测精度明显高于传统的矿山统计法。
Based on the gray system theory, the gas emission changes in coal mining face were analyzed, and the gas prediction model (GM) with different depth and tunneling process was established. The accuracy of gray prediction was obviously higher than that of traditional mining statistics .