含水煤岩瓦斯压力恢复曲线类别的论证分析

Demonstration analysis for the types of gas pressure recovery curve in water-containing coal-rock

在含水煤岩瓦斯压力测定过程中,为了正确的获得瓦斯压力测定结果,通过理论公式的推导分析纠正了以往得出瓦斯压力恢复曲线理论分析的不足,并由现场实测数据验证表明:当测压管中涌出的皆为瓦斯气体时,瓦斯压力恢复曲线为类抛物线型,这种规律在众多煤矿实地压力测定中得到验证;当测压管中涌出的全是水时,瓦斯压力恢复曲线为近似的直线型;当测压管中涌出的是瓦斯和水的混合物时,瓦斯压力恢复曲线为抛物线和直线的复合曲线型。

In order to obtain the correct gas pressure measurement results, in the process of gas pressure determination in water- containing coal - rock, through analyzing the theoretical formula, we corrected the shortcomings of theoretical analysis of the gas pressure recovery curve in the past. And according to the field data, when gas gushing from piezometric tube is all mashgas, the gas pressure recovery curve is similar to parabola, and this law has been verified in many coal mine gas pressure measuring; when the piezometric tube is full of water, the gas pressure recovery curve is approximately linear; when the piezometric tube is full of mixture of water and gas, the recovery pressure curve is a recombination of parabola linear.