含瓦斯煤岩流变规律及三维本构模型研究  

Rheological law and 3D constitutive model of coal rock containing gas

作　　者：王波[1] 黄子康 胡仕宇 王灵 杨沛基 陆长亮 WANG Bo;HUANG Zikang;HU Shiyu;WANG Ling;YANG Peiji;LU Changliang(School of Emergency Technology and Management,North China Institute of Science and Technology,Beijing 101601,China)

机构地区：[1]华北科技学院应急技术与管理学院,北京101601

出　　处：《山东科技大学学报（自然科学版）》2022年第5期60-67,共8页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：中央引导地方科技发展资金项目(226Z4101G);河北省自然科学基金项目(E2022508023)。

摘　　要：为了深入研究含瓦斯煤岩的蠕变本构模型,利用自主研发的RRTS-Ⅳ型岩石流变扰动效应试验机和含瓦斯煤岩流变扰动效应渗流试验装置进行含瓦斯煤岩三轴流变试验,得出含瓦斯煤岩的蠕变规律。基于有效应力原理和流动法则建立了含瓦斯煤岩三维蠕变本构方程,利用MATLAB对得出的蠕变方程进行拟合,拟合曲线与试验曲线吻合程度较高,验证了所建方程的合理性。通过建立的含瓦斯煤岩三维蠕变本构方程推断出含瓦斯煤岩存在极限变形量,结合试验过程可知,当含瓦斯煤岩的变形量达到该值时,应变速率会在短时间内急剧增大,导致煤岩发生破坏。To further study the rheological constitutive model of coal rock containing gas,the triaxial rheological experiment of coal rock containing gas was carried out by using the independently developed RRTS-IV rock rheological disturbance effect test machine and the seepage experiment device for gas-containing coal rock rheological disturbance effect.The rheological law of coal rock containing gas was obtained.Based on the effective stress principle and flow rule,a three-dimensional(3D)rheological constitutive equation of coal rock containing gas was then established and fitted by MATLAB.The fitting curve was in good agreement with the experimental curve,which verified the rationality of the established equation.The established 3D rheological constitutive equation and the test process show that there is a limit strain of coal rock containing gas,and that when the strain of coal rock containing gas reaches this value,the strain rate will increase sharply in a short time,resulting in the damage of coal rock.

关 键 词：含瓦斯煤岩 蠕变 本构方程 极限变形 

分 类 号：TD713[矿业工程—矿井通风与安全]