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在评价矿井危险性的工作中,如何准确掌握矿区瓦斯含量及压力是工作人员们面临的首要问题。对于一些无法直接测定煤层瓦斯含量、压力的矿区,需要采用间接法计算不同煤层深度的瓦斯含量及压力值。本文以陕西省延安市某煤矿为例,采用间接法计算不同深度煤层瓦斯压力及含量。先由煤层瓦斯压力梯度反推不同瓦斯压力条件下对应的埋深,而后利用瓦斯压力与含量之间关系,计算不同深度的瓦斯含量及压力。
In the evaluation of mine risk work, how to accurately grasp the mine gas content and pressure are the primary problems facing the staff. For some mining areas that can not directly determine the gas content and pressure in coal seams, indirect methods are needed to calculate the gas content and pressure at different coal seam depths. In this paper, a coal mine in Yan’an City of Shaanxi Province is taken as an example to calculate the gas pressure and its content in different depth coal seam by indirect method. Firstly, the corresponding burial depth of coal seam gas pressure gradient is deduced under different gas pressure conditions, and then the gas content and pressure at different depths are calculated according to the relationship between gas pressure and gas content.