Creep behaviour and constitutive model of coal filled with gas

被引：0

作者：

Li Xiangchun ^{[1
]}

Yang Chunli ^{[2
]}

Ren Ting ^{[3
]}

Nie Baisheng ^{[1
]}

Zhao Caihong ^{[1
]}

Liu Shuiwen ^{[1
]}

Jiang Tao ^{[1
]}

机构：

[1] School of Resource and Safety Engineering,China University of Mining & Technology

[2] Occupational Hazards Control Technology Center,Beijing Municipal Institute of Labour Protection

[3] Faculty of Engineering and Information Sciences,University of Wollongong

来源：

International Journal of Mining Science and Technology | 2017年 / 27卷 / 05期

关键词：

Coal; Gas; Creep; Constitutive model;

D O I：

暂无

中图分类号：

TD713 [煤（岩石）与瓦斯突出的预防和处理];

学科分类号：

081903 ;

摘要：

Coal exhibits different creep behaviours when filled with different amounts of gas. Creep tests of coal filled with 0 and 0.5 MPa gas were performed, and strain under different axial stress was compared.The three creep constitutive models which were analysed using the method fitting experimental data for determining which creep model can reflect the creep process of the test best. The results show that the deformation of coal filled with 0.5 MPa gas is more higher than that of coal filled with 0 MPa gas under the same axial stress. Gas plays a positive effect on the deformation of coal process and will accelerate creep process. And gas will reduce coal intensity and change coal creep properties.Compared with Nishihara Model and Extensional Nishihara Model, Burgers Model can reflect the three stages of creep process of coal filled with gas better. The research results can contribute to reveal coal and gas outburst mechanism.

引用

页码：847 / 851

页数：5

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