基于稳态渗流的煤巷掘进瓦斯涌出连续性预测

Continuity prediction of gas emission during drivage in coal seam based on stable percolation

为了寻求一种简便的预测方法实现煤巷掘进过程中瓦斯涌出的动态连续预测,在对煤层进行近似假设的基础上,研究了煤巷掘进过程中煤层瓦斯流动及涌出规律,给出了煤巷掘进时煤层瓦斯压力分布和煤壁瓦斯渗流速度的分析解,采用积分的方法建立了掘进巷道瓦斯涌出连续预测模型,并介绍了该模型的计算方法。通过实例计算表明:该模型利用巷道掘进速度、掘进长度和煤层瓦斯基本参数这些易得数据实现了对煤巷瓦斯涌出的动态、连续和快速预测,且预测值与实测值基本一致。

In order to seek a convenient method to implement the dynamic and continuity prediction of gas emission during drivage in coal seam,the researches were carried out on the laws of gas flowing and emission in seam during drivage and the analytical solution were put forward about gas pressure in seam and gas emission rate from coal face in tunnel during excavating in seam,based on the approximate assumption of the coal seam.The gas emission continuity prediction model was established using the method of integration,and the calculation method of this model was introduced.The calculation of an example shows that this model can be used to predict the gas emission dynamical,continuity and quickly using the data of tunnel driving rate,driving length and basic gas parameters that can be acquired easily.The predictive value is basically identical with the measured value.