黑龙江科技大学学报2025，Vol.35Issue(3)：395-402,8.DOI:10.3969/j.issn.2095-7262.2025.03.008
高应力下含瓦斯煤非线性应力-应变模型及参数分析
Nonlinear stress-strain model and parametric analysis of coal containing gas under high stress
摘要
Abstract
This paper is an effort to explore the stress and strain relationship of coal containing gas under high stress condition.The study involves analyzing the strain hardening deviatoric stress-strain curves of coal containing gas under high stress based on the results of the conventional triaxial compres-sion tests under various confining pressures and water contents;fitting the measurement data and assess-ing the applicability of the model by using the simplified CPE model and the arctangent model;and inves-tigating the influence of the model parameters on strength and deformation of the coal containing gas.The results show that both models achieve the coefficient of determination exceeding 0.9,indicating the good agreement with test curves,while better describing the deviatoric stress-strain curves of coal containing gas under high stress,the peak strength predicted by the simplified CPE model is more accurate,and the relative errors are all less than 3%.In the simplified CPE model,the parameter k determines the peak strength,while parameters b and n collectively determine the degree of strain hardening.For the arctan-gent model,the parameter a determines the peak strength,while parameter c determines the degree of strain hardening.关键词
含瓦斯煤/应变硬化/简化CPE模型/反正切模型Key words
coal containing gas/strain hardening/simplified CPE model/arctangent model分类
矿山工程引用本文复制引用
高霞,陈港庆,刘洪,张保勇,吴强..高应力下含瓦斯煤非线性应力-应变模型及参数分析[J].黑龙江科技大学学报,2025,35(3):395-402,8.基金项目
国家自然科学基金联合基金项目(U21A20111) （U21A20111）
国家自然科学基金项目(51974112) （51974112）
