煤矿安全2018，Vol.49Issue(1)：37-39,43,4.DOI:10.13347/j.cnki.mkaq.2018.01.010
三轴压缩条件下煤岩力学特性及破坏模式
Mechanical Properties and Failure Modes of Coal and Rock Under Triaxial Compression
任非1
作者信息
- 1. 三门峡职业技术学院,河南三门峡472000
- 折叠
摘要
Abstract
In order to investigate the mechanical properties and failure modes of coal samples from a coal mine under triaxial compression environment,setting up confining pressure gradient of 0.2,0.4,0.8,1.1,2.0 and 3.0 MPa,the electro-hydraulic servo testing system is used to carry out the triaxial test;fitting analysis for test data,the expression about relationship of peak compressive strength,elastic modulus and confining pressure is established;failure characteristics of coal samples are analyzed,the impact of applying confining pressure on coal samples with different failure modes is discussed.The results show that:the peak compressive strength and elastic modulus increase with the confining pressure,and the variation of peak compressive strength and elastic modulus increases first and then decreases with the increasing of confining pressure;the peak strength and confining pressure present a logarithmic distribution law;while the elastic modulus increases exponentially with the increase of confining pressure;with the increase of confining pressure,the failure modes of coal samples may be the tensile-shear (tensile dominated)-shear failure mode.关键词
三轴试验/煤样/弹性模量/定量表征/破坏模式Key words
triaxial experiment/coal samples/elastic modulus/quantitative characterization/failure modes分类
矿业与冶金引用本文复制引用
任非..三轴压缩条件下煤岩力学特性及破坏模式[J].煤矿安全,2018,49(1):37-39,43,4.
