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首页> 外文期刊>International Journal of Oil, Gas and Coal Technology: IJOGCT >Experimental study of gas pressure and effective stress influencing on gas seepage characteristics of bituminous coal in both axial and radial directions
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Experimental study of gas pressure and effective stress influencing on gas seepage characteristics of bituminous coal in both axial and radial directions

机译：轴向和径向沥青煤气渗流对气体压力和有效应力的实验研究

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The effects of factors including effective stress, gas pressure, and Klinkenberg effect on the axial and radial gas seepage characteristics of bituminous coal, and the strain of the coal in the radial seepage process, are investigated with self-built GFDTA system. The concept of effective stress sensitivity coefficient is proposed, and the sensitivity of the permeability to the effective stress is negligible when the effective stress sensitivity coefficient is 0.01. It is concluded that the effective stress sensitivity coefficient decreases with increasing effective stress, and increases with increasing gas pressure. With the confining pressure and gas pressure increasing, the effect of unloading on the decrease degree of coal axial permeability decreases. In the axial seepage process, the sensitivity of permeability to confining stress is higher than that of axial pressure. In the radial seepage process, the influence of gas pressure on permeability is larger than that of axial pressure. [Received: September 21, 2017; Accepted: December 1, 2017]
机译：采用自置GFDTA系统研究了因素包括有效应力，气体压力和Klinkenberg对烟煤渗漏特性的影响，以及径向渗流过程中煤的菌株的影响。提出了有效应力敏感系数的概念，并且当有效应力敏感系数为0.01时，渗透率对有效应力的敏感性可忽略不计。结论是，随着有效应力的增加，有效应力敏感系数降低，随着气压的增加而增加。随着狭窄的压力和气体压力的增加，卸载对煤轴渗透率降低的影响降低。在轴向渗流过程中，渗透率对限制应力的敏感性高于轴压。在径向渗流过程中，气体压力对渗透率的影响大于轴向压力的影响。 [收到：2017年9月21日;接受：2017年12月1日]

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