瓦斯涌出量分源预测法与实测法差异性分析

Analysis on Gas Emission Separate Source Method and Measurement Method of Variance

宽沟煤矿属于高瓦斯矿井,工作面布置长度长,确保工作面综掘期间瓦斯不超限。采用理论计算、现场实测及公式推导计算的方法,采用分源预测法与实测法对综掘工作面瓦斯涌出量进行分析计算,主要从煤壁和落煤瓦斯涌出量、煤壁瓦斯涌出强度、瓦斯涌出随时间衰减系数等参数分析计算,对2种方法计算结果进行对比性分析。结果表明:分源预测与实测结果存在较大的差异性,从不同的角度分析了差异性存在的原因,总结该综掘工作面瓦斯涌出量的真实值,从而为确定综掘工作面合理配风量的计算和完善瓦斯防治措施提供了依据。

Kuanguo coal mine belongs to the high-gas mine, and the working surface is long in length to ensure that the gas is not overrun during the comprehensive excavation. Based on the theoretical calculation,the field measurement and the formula derivation calculation,the source emission forecasting method and the measured method are used to analyze and calculate the gas emission from the coal mining face,mainly from the coal wall and the coal gas emission,out strength,gas emission with time attenuation coefficient and other parameters of the calculation,the results of the two methods for comparative analysis. The results show that there are big differences between the source prediction and the measured results,and the reason of the difference is analyzed from different angles. The real value of the gas emission in the fully mechanized coal mining face is summarized,which can reasonably determine the comprehensive mining face reasonable allocation of air volume and improve the gas control measures to provide a basis.