煤矿安全2024，Vol.55Issue(1)：22-27,6.DOI:10.13347/j.cnki.mkaq.20230537
不同含水率条件下含瓦斯煤改进邓肯-张模型
Improved Duncan-Chang model for coal containing gas under different water content
摘要
Abstract
This paper aims to establish a model that can reasonably reflect the mechanical properties of coal containing gas under dif-ferent water content and confining pressure conditions.Firstly,the stress-strain characteristics of coal containing gas under different water content and confining pressure conditions are analyzed based on triaxial tests.Afterwards,this paper obtains the Duncan-Chang model parameters by combining the Duncan-Chang model and Janbu formula.Moreover,it establishes the fitting formulas of initial elastic modulus failure stress and various influencing factors,and conducts an improved Duncan-Chang model to characterize the deformation law of coal containing gas under different stress levels.Finally,this paper verifies the improved model and evaluate the accuracy of the mode.The results show that the increase of water content is an important reason for the dynamic change of coal model parameters of coal containing gas.The prediction curve of the improved model is in good agreement with the actual test curve,and the improved model can accurately reflect the stress-strain characteristics of coal containing gas under different confining pres-sures and water contents.关键词
含瓦斯煤/煤变形规律/邓肯-张模型/Janbu公式/修正模型/煤应力应变特性Key words
coal containing methane/coal deformation law/Duncan-Chang model/Janbu formula/modified model/stress-strain characteristics of coal分类
矿业与冶金引用本文复制引用
高霞,刘洪,陈港庆,张保勇,吴强..不同含水率条件下含瓦斯煤改进邓肯-张模型[J].煤矿安全,2024,55(1):22-27,6.基金项目
国家自然科学基金能源与化工领域区域创新发展联合基金资助项目(U21A20111) （U21A20111）
国家自然科学基金面上资助项目(51974112) （51974112）
