突出煤层瓦斯吸附解吸特性核磁共振谱试验研究
发布时间：2018-08-16 14:58
【摘要】：随着深部开采的推进,煤与瓦斯(甲烷)突出已成为安全高效采矿的重大隐患,煤中瓦斯赋存运移微细观作用机制试验研究至关重要。采用核磁共振T_2谱技术,以阜新盆地孙家湾矿高瓦斯高突煤层为例,试验研究煤样瓦斯吸附解吸核磁共振谱,模拟煤层瓦斯赋存和运移全过程。结果表明,吸附态、游离态和自由态瓦斯核磁共振T_2谱范围可由不同T_2截止阈值定量划分;吸附过程和解吸过程中,吸附态瓦斯量与瓦斯压力的关系符合朗格缪尔方程,而游离态瓦斯量与瓦斯压力成线性关系;吸附态瓦斯解吸过程表现出一定滞后性,且存在5.5 MPa临界滞后压力,游离态瓦斯解吸过程无明显滞后性。
[Abstract]:With the advance of deep mining, outburst of coal and gas (methane) has become a major hidden danger in safe and efficient mining. It is very important to test and study the microcosmic mechanism of gas storage and migration in coal. By means of NMR T _ 2 spectroscopy and taking the high-gas and high-outburst coal seams in Sunjiawan Mine of Fuxin Basin as an example, the gas adsorption and desorption NMR spectra of coal samples are experimentally studied to simulate the whole process of coal seam gas storage and migration. The results show that the range of NMR T _ 2 spectrum of adsorbed, free and free gas can be quantitatively divided by different cut-off thresholds of T _ 2, and the relationship between gas quantity and gas pressure in adsorption and desorption is in accordance with Langmuir equation. The adsorption state gas desorption process shows a certain lag, and there is 5.5 MPa critical lag pressure, the free state gas desorption process has no obvious lag.
【作者单位】： 辽宁工程技术大学力学与工程学院;
【基金】：国家重点研发计划项目(2016YFC0600901) 国家自然科学基金面上项目资助(51374119) 辽宁省高等学校优秀人才支持计划(LR2015028)
【分类号】：TD713
，
本文编号：2186325
[Abstract]:With the advance of deep mining, outburst of coal and gas (methane) has become a major hidden danger in safe and efficient mining. It is very important to test and study the microcosmic mechanism of gas storage and migration in coal. By means of NMR T _ 2 spectroscopy and taking the high-gas and high-outburst coal seams in Sunjiawan Mine of Fuxin Basin as an example, the gas adsorption and desorption NMR spectra of coal samples are experimentally studied to simulate the whole process of coal seam gas storage and migration. The results show that the range of NMR T _ 2 spectrum of adsorbed, free and free gas can be quantitatively divided by different cut-off thresholds of T _ 2, and the relationship between gas quantity and gas pressure in adsorption and desorption is in accordance with Langmuir equation. The adsorption state gas desorption process shows a certain lag, and there is 5.5 MPa critical lag pressure, the free state gas desorption process has no obvious lag.
【作者单位】： 辽宁工程技术大学力学与工程学院;
【基金】：国家重点研发计划项目(2016YFC0600901) 国家自然科学基金面上项目资助(51374119) 辽宁省高等学校优秀人才支持计划(LR2015028)
【分类号】：TD713
，
本文编号：2186325
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