【摘要】：隨著深部開采的推進(jìn),煤與瓦斯(甲烷)突出已成為安全高效采礦的重大隱患,煤中瓦斯賦存運(yùn)移微細(xì)觀作用機(jī)制試驗(yàn)研究至關(guān)重要。采用核磁共振T_2譜技術(shù),以阜新盆地孫家灣礦高瓦斯高突煤層為例,試驗(yàn)研究煤樣瓦斯吸附解吸核磁共振譜,模擬煤層瓦斯賦存和運(yùn)移全過程。結(jié)果表明,吸附態(tài)、游離態(tài)和自由態(tài)瓦斯核磁共振T_2譜范圍可由不同T_2截止閾值定量劃分;吸附過程和解吸過程中,吸附態(tài)瓦斯量與瓦斯壓力的關(guān)系符合朗格繆爾方程,而游離態(tài)瓦斯量與瓦斯壓力成線性關(guān)系;吸附態(tài)瓦斯解吸過程表現(xiàn)出一定滯后性,且存在5.5 MPa臨界滯后壓力,游離態(tài)瓦斯解吸過程無明顯滯后性。
[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.
【作者單位】： 遼寧工程技術(shù)大學(xué)力學(xué)與工程學(xué)院;
【基金】：國家重點(diǎn)研發(fā)計劃項(xiàng)目(2016YFC0600901) 國家自然科學(xué)基金面上項(xiàng)目資助(51374119) 遼寧省高等學(xué)校優(yōu)秀人才支持計劃(LR2015028)
【分類號】：TD713
，

本文編號：2186325