[1]裴 权,高 霞*.含瓦斯煤体非线性应力-应变模型研究[J].湖南城市学院学报(自然科学版),2019,28(5):17-21.[doi:10.3969/j.issn.1672-7304.2019.05.0004]
 PEI Quan,GAO Xia*.Study of a Nonlinear Stress-strain Model of Coal Containing Gas[J].,2019,28(5):17-21.[doi:10.3969/j.issn.1672-7304.2019.05.0004]
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含瓦斯煤体非线性应力-应变模型研究()
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《湖南城市学院学报(自然科学版)》[ISSN:1006-6977/CN:61-1281/TN]

卷:
28
期数:
2019年5期
页码:
17-21
栏目:
土木工程
出版日期:
2019-09-20

文章信息/Info

Title:
Study of a Nonlinear Stress-strain Model of Coal Containing Gas
文章编号:
1672–7304(2019)05–0017–05
作者:
裴 权高 霞*
黑龙江科技大学 建筑工程学院,哈尔滨 150022
Author(s):
PEI Quan GAO Xia*
School of Architectural Engineering, Heilongjiang University of Science of Technology, Harbin, Heilongjiang 150022, China
关键词:
含瓦斯煤体三轴压缩邓肯-张模型指数模型
Keywords:
coal containing gas triaxial compression test Duncan-Chang model exponential model
分类号:
TU457
DOI:
10.3969/j.issn.1672-7304.2019.05.0004
文献标志码:
A
摘要:
含瓦斯煤体的应力-应变本构模型是煤岩工程领域研究的一个重要课题﹒结合不同含水率与围压下的含瓦斯煤体应力-应变曲线发展特点,采用邓肯-张双曲线模型、指数模型以及修正的邓肯-张模型对含瓦斯煤体常规三轴压缩试验的应力-应变曲线进行了拟合,并从强度与变形特征角度展开了对比分析﹒研究结果表明:相对于邓肯-张模型及指数模型而言,修正的邓肯-张模型能更好地反映含瓦斯煤体强度随围压与饱和度变化的规律,破坏强度理论值与实测值的相对误差都在5%以内;模型切线模量理论值虽较实测值偏低,但作为材料变形参数设计值是偏安全的﹒
Abstract:
The stress-strain constitutive model of coal containing gas is an important subject in the field of coal and rock engineering. Combined with the development characteristics of the stress-strain curve of the coal containing gas under different water content and confining pressure, the Duncan-Chang hyperbolic model, the exponential model and the modified Duncan-Chang model are used to stress the conventional triaxial compression test of the coal containing gas.The strain curves were fitted and compared from the perspective of strength and deformation characteristics. The results show that the modified Duncan-Chang model can better reflect the variation of the coal containing gas strength with confining pressure and saturation than the Duncan-Chang model and the exponential model. And the fitting relative error between the theoretical value and the measured value is within 5%. Although the theoretical value of tangent modulus for the modified Duncan-Chang model is lower than the measured value, it is safe to be used as the design value of material deformation parameters.

备注/Memo

备注/Memo:
收稿日期:2019-04-19 第一作者简介:裴权(1995-),男,湖北洪湖人,硕士生,主要从事煤岩力学性质研究﹒E-mail: 491627048@qq.com﹒*通信作者简介:高霞(1984-),女,山西忻州人,博士,硕士生导师,主要从事煤岩力学性质研究﹒E-mail: 850582360@qq.com
更新日期/Last Update: 2019-10-24