基于煤屑解吸瓦斯压力煤层瓦斯压力测定方法.doc

基于煤屑解吸瓦斯压力的煤层瓦斯压力测定方法 韩世英, 魏风清,史广山,杜晓奇 （河南理工大学 安全科学与工程学院，河南 焦作 454000） 摘要：煤层瓦斯压力是判断煤层突出危险性的重要指标，同时也是采取抽放措施的重要参考依据，因此快速、准确煤层瓦斯压力瓦斯压力，对相同时间煤瓦斯压力A表明煤屑在不同平衡瓦斯压力下解吸的差异性，和煤层瓦斯。根据此规律，可在测瓦斯压力曲线的系数A后，结合已确定算出煤层瓦斯压力，并在赵家寨煤矿得到了验证。 Determination of Coal Seam Gas Pressure Based on Gas Pressure of Coal Desorption Han Shi-ying; Wei Feng-qing; Shi Guang-shan; Du Xiao-qi (School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, Henan, China) Abstract: The coal seam gas pressure is a significant index to judge the risk of coal and gas outburst and simultan- eously is an important reference on the drainage measures. Therefore, it is very important to determining the coal s- eam gas pressure quickly and accurately. By means of the experiments of determining gas pressure of broken coal, the paper analyzed gas pressure build-up curves of broken coal in the same lost time and the different balance pres- sure and found that the coal seam gas pressure has a determined relation with the balance pressure. The experiments show that the logarithmic formula can fit gas pressure build-up curves better. The coefficient A indicates the differe- nce of coal desorption in different balance pressure and has an exponential relationship with coal seam gas pressure. Based on this law, after measuring live coefficient A of gas pressure build-up curves of broken coal, the gas pressur- e can be determined combining the known exponential formula of coal seam gas pressure, and this method has been validated in Zhaojiazhai coal mine with good effect. Key words: coal seam gas pressure; balance gas pressure; build-up curve; logarithmic formula; exponential relatio- nship; 煤层瓦斯压力是煤层瓦斯含量计算和煤层突出危险性预测、评价的基本参数，也是瓦斯防治措施效果检验的主要指标[1]。因此，快速、准确地测定煤层瓦斯压力，对于制定合理的煤矿瓦斯综合防治措施、保证煤矿安全生产具有十分重要的现实意义。 几十年来，国内外许多学者针对如何快速、准确测定煤层瓦斯压力进行了大量的研究和试验，提出了各种各样的测定方法，其总体上可分为直接法和间接法。直接测定法按封孔材料的不同[2]主要可分为：1）水泥砂浆封孔法，该方法适用性强，操作简单，成本低，但是只适用于岩层致密完整，无裂隙发育的钻孔，地质条件复杂时难以完全封堵裂隙，封孔效果难以保证；2）封孔器测压法，该方法利用各种封孔器封堵钻孔两端，然后通过粘液充填封钻孔