Test study on permeability properties of coal specimen in complete stress-strain process
Test study on permeability properties of coal specimen in complete stress-strain process
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DOI：
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发表时间：
2007
影响因子：
1.5
通讯作者：
Chen Shao-jie
中科院分区：
文献类型：
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作者：
Chen Shao-jie
在MTS815伺服岩石力学试验系统上进行了全应力-应变过程中煤的渗透性试验。试验结果表明，渗透率曲线与煤的全应力-应变曲线几乎具有相同的变化趋势。但渗透率-应变曲线具有较强的“滞后性”，说明损伤的演变与渗透率的发展具有密切的相关性，渗透率的发展需要一定的时间。煤的微观结构和微观组成比其他沉积岩更为复杂和不同；所以不同种类煤的渗透率是有很大差异的。同时，煤的微孔隙和微断裂更为发育，有效围压对煤穿透性的影响更为明显。
The permeability test of coal in the complete stress-strain process is carried on the MTS815 Servo-controlled Rock Mechanical Test System.Test results indicate that the permeability rate curve and the complete stress-strain curve of coal almost have the same variation trend.But the permeability rate-strain curve is relatively “hysteretic” which indicates that the close relativity between the evolvement of damage and the development of permeability rate and the permeability developing needs a time.The micro-structure and micro-composition of coal are more complicated and different than other sedimentary rocks;so the permeability of different kinds of coal is much different.Moreover,the micro-porosity and micro-fracture of coal are more developed,so the influence of available confining pressure on penetrability of coal is more obviously.