【摘要】：針對瓦斯吸附解吸法測定瓦斯擴散系數(shù)時局限于顆粒煤、無法施加圍壓且氣體壓力不能任意設(shè)定等問題,采用規(guī)則塊煤結(jié)合氣相色譜分析法測定瓦斯在塊煤中的擴散系數(shù),分析了不同氣體壓力、溫度下塊煤瓦斯擴散規(guī)律。實驗結(jié)果表明,隨著氣體壓力的增大,煤基質(zhì)吸附氣體增加且發(fā)生膨脹變形,從而孔隙減小,擴散阻力增大,擴散系數(shù)減小;隨著溫度的升高,氣體分子運動速度增大,擴散動力增強,擴散系數(shù)變大。
[Abstract]:In order to solve the problem that the gas diffusion coefficient measured by gas adsorption desorption method is limited to granular coal, the confining pressure can not be applied and the gas pressure can not be set arbitrarily, the gas diffusion coefficient in block coal is determined by regular block coal and gas chromatographic analysis. The gas diffusion law of block coal under different gas pressure and temperature is analyzed. The experimental results show that with the increase of gas pressure, the gas adsorbed by coal matrix increases and expands and deforms, thus the porosity decreases, the diffusion resistance increases, the diffusion coefficient decreases, and the velocity of gas molecules increases with the increase of temperature. The diffusion force increases and the diffusion coefficient increases.
【作者單位】： 河南理工大學安全科學與工程學院;河南能源化工集團鶴煤五礦;
【分類號】：TD712

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