含瓦斯煤全应力–应变过程中力学及渗流特性试验研究
Experiment Study on Mechanics and Permeability of Coal Containing Gas under the Total Stress-Strain Tests
作者: 王 倩 * , 卢明玥 :重庆工程职业技术学院,重庆; 王维忠 :重庆大学煤矿灾害动力学与控制国家重点实验室,重庆;
关键词: 含瓦斯煤; 应力–应变关系; 弹性模量; Coal Containing Gas; The Stress-Strain Relationship; Elastic Modul
摘要:Abstract: A self-developed device called the coal-containing heat solid coupling servo seepage device is used to do the total stress-strain tests of coal samples. The result shows: In the process of continuous load, the stress-strain relationship of coal containing gas can be divided into four stages: the initial com-paction phase, the elastic phase, the yield and damage phase, the post-failure phase. The stress- strain relationship of these four phases makes a big difference; elastic modulus of coal containing gas first decreases and then keeps constant; it declines rapidly after destruction; the Poisson's ratio firstly dropped after a slow rise, and it raised rapidly after destruction. With the change of axial stress, the axial stress of the coal containing gas and its permeability is opposite. Permeability of the coal containing gas is closely related with its volumetric strain. But we have analyzed and found that, the permeability of the coal is not the lowest when its volume is the smallest.
文章引用: 王 倩 , 卢明玥 , 王维忠 (2015) 含瓦斯煤全应力–应变过程中力学及渗流特性试验研究。 矿山工程, 3, 188-194. doi: 10.12677/ME.2015.34026
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