基于残存瓦斯量的煤层瓦斯压力及含量测定方法

在实验室条件下,研究了石港煤矿9#、14#、15#煤层的瓦斯压力、破碎粒度对残存瓦斯量的影响,结果表明:残存瓦斯量与瓦斯压力、瓦斯含量均呈幂函数关系;煤样的破碎粒度对残存瓦斯量影响显著,主要表现在粒径越小,残存瓦斯量越小,并且当煤样粒径增大或者减小到一定程度时,残存瓦斯量趋于定值。根据实验结果,可以先测定煤样的残存瓦斯量,再利用事先确定的煤样残存瓦斯量与煤层瓦斯压力及含量的关系,推算煤层瓦斯压力及含量。

Determination of Coal-seam Gas Pressure and Content Based on Residual Gas Amount

In this paper,study was made on the influence of the gas pressure of No.9,14 and 15 seams and the broken size of coal on the residual gas amount under the laboratory conditions.The results showed that the residual gas amount was in a power function relation with gas pressure and content,and the broken size of coal samples had a marked effect on residual gas amount,it mainly displayed that the smaller the size of coal,the smaller the residual gas amount,and when the size of coal samples increased or decreased to a certain extent,the residual gas amount tended to a constant value.Based on this experimental result,the gas pressure and content of coal seams can be determined by measuring the residual gas amount of coal samples and using the predetermined relation between the residual gas amount of coal samples and the gas pressure and content of coal seams.