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在无法采用直接法测定煤层瓦斯压力时,间接测算法提供了一种获取瓦斯压力的重要手段。着重介绍了根据瓦斯压力梯度、瓦斯涌出量、煤层原始瓦斯含量、残余瓦斯含量、煤屑瓦斯解吸量和解吸指标△h2等间接测量瓦斯压力的方法,以及从热力学角度和考虑地应力、地温影响的煤层瓦斯压力理论计算方法。煤矿企业可根据自身情况从中选用一种最有效的测算方法,以获取煤层(特别是深部开采煤层)的瓦斯压力。
When direct method can not be used to determine gas pressure in coal seam, indirect measurement method provides an important means to get gas pressure. The method of indirect measurement of gas pressure based on gas pressure gradient, gas emission, original gas content of coal seam, residual gas content, desorption amount of coal gas desorption and △ h2 of desorption is introduced emphatically. The method of measuring gas pressure indirectly from thermodynamic point of view, Influence of coal seam gas pressure theoretical calculation method. According to their own circumstances, coal mining enterprises can choose one of the most effective calculation method to get the coal seam (especially deep seam coal seam) gas pressure.