基于瓦斯风化带判定指标的矿井瓦斯涌出量预测研究

Study on Prediction of Mine Gas Emission Based on Judgment Index of Gas Weathering Zone

为研究瓦斯风化带内煤层的瓦斯涌出量预测,分析了簸萁掌煤业19^(#)煤层实测瓦斯含量和气体组分,确定了19^(#)煤层处于瓦斯风化带,并分析煤层瓦斯含量较低的成因。鉴于19^(#)煤层无显著瓦斯赋存规律,无法确定最大瓦斯含量,采用“瓦斯风化带判定指标”的煤种瓦斯含量指标作为煤层最大瓦斯含量进行19^(#)煤层瓦斯涌出量预测,实测值和预测值相对误差为3.92%,满足实际需求。

In order to study the prediction of gas emission from the coal seam in the gas weathering zone,the measured gas content and gas composition in the 19^(#)coal seam of Boqizhao Coal Industry are analyzed,it is determined that the 19^(#)coal seam is in the gas weathering zone,and the cause of low gas content in the coal seam is analyzed.In view of the fact that there is no significant law of gas occurrence in the 19^(#)coal seam,and it is impossible to determine the maximum gas content,the coal gas content index of"gas weathering zone judgment index"is used as the maximum gas content of the coal seam to predict the gas emission from the 19^(#)coal seam.The relative error between the measured value and the predicted value is 3.92%,which meets the actual demand.