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为了能够准确快速确定煤层瓦斯压力,基于煤层瓦斯解吸特性提出了确定煤层瓦斯压力的新方法.通过对煤屑瓦斯扩散过程理论解的进一步分析得出煤层瓦斯压力与煤屑解吸对1~3mm粒径煤样具有确定关系.解吸测定,通过不同公式对解吸数据的拟合分析发现对数公式能够更好的拟合解吸曲线,从而确定对数公式为最佳拟合公式.对数公式中系数A能够表明煤样在不同瓦斯压力下解吸趋势的差异性,与瓦斯压力具有指数关系.并且在不同暴露时间下其数值可以保持在稳定值,可以利用系数A与瓦斯压力的关系进行煤层瓦斯压力的推算.
In order to accurately and quickly determine the gas pressure in coal seam, a new method to determine the gas pressure of coal seam is proposed based on gas desorption characteristics of coal seam.By further analysis of the theoretical solution of gas diffusion process of coal gas, Diameter coal sample has a certain relationship.Desorption desorption, desorption data through the different formula fitting analysis found that the logarithmic formula can better fit the desorption curve, so as to determine the logarithmic formula for the best fitting formula. Logarithmic formula in the coefficient A can show the difference of desorption tendency of coal samples under different gas pressures and has an exponential relationship with gas pressure and its value can be maintained at a steady value at different exposure times.The relationship between coefficient A and gas pressure can be used to carry out coal seam gas pressure Projection.