Creep behaviour and constitutive model of coal filled with gas

作     者：Li Xiangchun Yang Chunli Ren Ting Nie Baisheng Zhao Caihong Liu Shuiwen Jiang Tao 

作者机构：School of Resource and Safety EngineeringChina University of Mining & Technology Occupational Hazards Control Technology CenterBeijing Municipal Institute of Labour Protection Faculty of Engineering and Information SciencesUniversity of Wollongong 

出 版 物：《International Journal of Mining Science and Technology》 (矿业科学技术学报（英文版）)

年 卷 期：2017年第27卷第5期

页      面：847-851页

核心收录：

学科分类：0819[工学-矿业工程] 081903[工学-安全技术及工程] 08[工学] 

基　　金：supported by National Natural Science Funds of China (No. 51304212) Specialized Research Fund for the Doctoral Program of Higher Education (No. 20120023120005) Beijing Higher Education Young Elite Teacher Project (No. YETP0930) Fun-damental Research Funds for the Central Universities (No. 2009QZ09) Open Foundation of State Key Laboratory of Coal Resources and Safe Mining (No. SKLCRSM11KFB04) 

主　　题：Coal Gas Creep Constitutive model 

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 *** 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 *** 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.