本文選題：低變質(zhì)程度 + 孔隙結(jié)構(gòu)��； 參考：《煤炭科學(xué)技術(shù)》2017年12期

【摘要】：為了探究不同溫度和圍壓耦合影響下的煤樣滲透率變化特征,選用甘肅新北礦區(qū)低變質(zhì)程度的煙煤,采用實驗室試驗的方法,借助Quanta TM 250掃描電子顯微鏡、Auto Pore IV 9500全自動壓汞儀、Autosorb-1型全自動比表面和孔徑分布分析儀,對煤樣的內(nèi)外部孔隙特征進行了測試分析;采用自主搭建的瓦斯?jié)B流測定裝置,對不同溫度和圍壓耦合條件下的原煤瓦斯?jié)B流進行了測定。結(jié)果表明:在試驗采用的溫度、圍壓變化范圍(25~80℃,3~9 MPa)內(nèi),所測得的16組煤樣滲透率均表現(xiàn)出了較強的溫度、壓力敏感性,圍壓對滲透率的影響明顯高于溫度對滲透率的影響;隨著溫度和圍壓的增大,滲透率呈減小趨勢,而且減小趨勢逐漸放緩,變化符合冪函數(shù)關(guān)系;溫度與圍壓耦合時對煤樣滲透率的影響顯著,滲透率的變化服從指數(shù)分布。
[Abstract]:In order to investigate the characteristics of permeability change of coal samples under the influence of different temperature and confining pressure coupling, bituminous coal with low metamorphic degree in Xinbei Mining area, Gansu Province, was selected, and the method of laboratory test was used.With the help of Quanta TM 250 scanning electron microscope and Auto Pore IV 9500 automatic mercury injection instrument, Autosorb 1 automatic specific surface and pore size distribution analyzer, the internal and external pore characteristics of coal samples were tested and analyzed.The percolation of raw coal gas at different temperature and confining pressure was measured.The results show that the permeability of 16 groups of coal samples measured in the temperature range of 2580 鈩，

本文編號：1738525