The paper establishes the gray forecast model, and forecasts the amount of gas emission of the laneway based on the history data, and then compartmentalizes the danger grade for the laneway.

• 建立灰色 预测模型，对巷道瓦斯涌出量进行预测，进而对巷道中的瓦斯事故危险性进行危险等级划分；