本文選題：瓦斯包 + 分形維數(shù)��； 參考：《地下空間與工程學(xué)報(bào)》2017年01期

【摘要】：利用紅外熱成像手段,對(duì)不同壓力下煤吸附解吸甲烷過(guò)程中瓦斯包演化過(guò)程進(jìn)行了觀察,并評(píng)估其吸附特征與在煤中的分布規(guī)律。研究表明:煤中存在不同尺度與甲烷吸附能力的瓦斯包,吸附/解吸甲烷時(shí),煤中瓦斯包比鄰近區(qū)域具有更明顯的升溫/降溫現(xiàn)象;吸附壓力越大,煤樣吸附平衡時(shí)間越短。通過(guò)圖像處理的方法對(duì)不同吸附壓力條件下的紅外熱像圖中的瓦斯包區(qū)域進(jìn)行提取,可有效計(jì)算其甲烷吸附特征。計(jì)算表明,隨著吸附壓力升高,煤體瓦斯包中甲烷集中程度降低。在微米尺度下,煤中瓦斯包分布具有分形特征,且分形維數(shù)均在1.95~2.00之間。隨著吸附壓力升高,瓦斯包中甲烷集中程度降低,不同尺度的瓦斯包均發(fā)生了連通演化。
[Abstract]:The evolution process of methane adsorption and desorption of coal under different pressure was observed by infrared thermal imaging, and its adsorption characteristics and distribution in coal were evaluated. The results show that there are gas bundles of different scales and methane adsorption ability in coal. When methane is adsorbed / desorbed, the gas package in coal has a more obvious warming / cooling phenomenon than that in adjacent areas, and the higher the adsorption pressure, the shorter the adsorption equilibrium time of coal sample. The methane adsorption characteristics can be effectively calculated by extracting the gas package region from the infrared thermal image under different adsorption pressures by image processing. The results show that the concentration of methane decreases with the increase of adsorption pressure. At the micron scale, the distribution of gas packets in coal has fractal characteristics, and the fractal dimension is between 1.95 and 2.00. With the increase of adsorption pressure, the concentration of methane in gas ladle decreases, and the connected evolution occurs in different scales of gas bundles.
【作者單位】： 太原理工大學(xué)礦業(yè)工程學(xué)院;太原理工大學(xué)原位改性采礦教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金(21373146,51304142) 山西研究生優(yōu)秀創(chuàng)新項(xiàng)目(20150016)
【分類號(hào)】：TD712

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