本文選題：柱狀煤芯　切入點：瓦斯　出處：《中國礦業(yè)大學學報》2017年05期 　論文類型：期刊論文

【摘要】：采用Φ50mm×100mm的標準柱狀原煤樣開展了不同溫壓下的瓦斯擴散實驗,同時開展了同種煤的顆粒煤瓦斯擴散對照實驗.為描述大尺度柱狀煤樣的瓦斯擴散過程,建立了柱狀煤芯瓦斯擴散方程,導出了其擴散率解析解.實驗表明:相比顆粒煤樣,柱狀原煤瓦斯擴散緩慢,表現(xiàn)為同時間下瓦斯累計擴散量和擴散率遠小于顆粒煤.柱狀煤芯的擴散系數(shù)遠大于顆粒煤的擴散系數(shù),是后者的11.72倍,而柱狀煤的有效擴散系數(shù)遠小于顆粒煤的有效擴散系數(shù),僅為后者的1.82%.原因是柱狀原煤包含了更大的孔裂隙結(jié)構,使其擴散系數(shù)較大,但因擴散路徑的加長和迂曲度的增大,使其有效擴散系數(shù)較小,最終導致其具有較小的瓦斯釋放能力.
[Abstract]:The gas diffusion experiments under different temperature and pressure were carried out with standard cylindrical coal samples of 桅 50mm 脳 100mm, and the gas diffusion experiments of the same coal were carried out in order to describe the gas diffusion process of large scale columnar coal samples. The gas diffusion equation of columnar coal core is established and the analytical solution of its diffusivity is derived. The experimental results show that the gas diffusion of columnar raw coal is slower than that of granular coal. The results show that the accumulative gas diffusivity and diffusivity are much smaller than that of granular coal at the same time, and the diffusion coefficient of columnar coal core is much larger than that of granular coal, 11.72 times of that of the latter. The effective diffusion coefficient of columnar coal is much smaller than that of granular coal, which is only 1.82 of the latter. The reason is that the columnar raw coal contains larger pore and fissure structure, which makes its diffusion coefficient larger, but due to the increase of diffusion path and roundness, The effective diffusion coefficient is small, which leads to the smaller gas release capacity.
【作者單位】： 重慶大學煤礦災害動力學與控制國家重點實驗室;河南理工大學中原經(jīng)濟區(qū)煤層(頁巖氣)河南省協(xié)同創(chuàng)新中心;河南理工大學煤礦災害預防與搶險救災教育部工程研究中心;河南理工大學河南省瓦斯地質(zhì)與瓦斯治理重點實驗室-省部共建國家重點實驗室培育基地;
【基金】：煤礦災害動力學與控制國家重點實驗室開放課題(2011DA105287-KF201313) 國家自然科學基金項目(51004041,51374095,41172141) 長江學者和創(chuàng)新團隊發(fā)展計劃項目(PCSIRT1235)
【分類號】：TD712
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本文編號：1572033