煤矿安全2018，Vol.49Issue(1)：9-12,4.DOI:10.13347/j.cnki.mkaq.2018.01.003
不同加载条件下原煤力学渗流特性试验研究
Experimental Study on Mechanical and Seepage Characteristics of Raw Coal Under Different Loading Conditions
陈春谏 1赵耀江 1杨阳1
作者信息
- 1. 太原理工大学矿业工程学院,山西太原030000
- 折叠
摘要
Abstract
Taking the coal sample from Lu'an Group Changcun Coal Mine as the research object,we researched the mechanical and permeability characteristics of coal containing gas by using WYS-800 microcomputer control electro-hydraulic servo triaxial test device under different loading conditions.The results show that the ultimate compressive strength and elastic modulus of compression of coal in three axial compression are larger than the corresponding value of uniaxial conditions;with the increasing of confining pressure,the compressive strength and elastic modulus of coal will also increase,and the elastic modulus shows good linearity;stress-strain curve under cyclic loading and unloading tests is subject to the corresponding curves of conventional triaxial compression tests in a certain extent,and the peak strength decreases;the stress body strain curve of coal rock showed expansion mechanism under low confining pressure;however,under higher confining pressure,the coal sample body is always in a compressed state in pre-peak and post-peak.The relation between the permeability of coal containing gas and the strain presents a trend of inclined letter "V" under triaxial compression.With the increase of loading and unloading times in cyclic loading and unloading axial compression test,the permeability of coal sample decreases,but the decreasing gradient decreases.关键词
岩石力学/三轴压缩/加载条件/渗透率/力学特性/渗流特性Key words
rock mechanics/triaxial compression/loading condition/permeability/mechanical property/seep characteristics分类
矿业与冶金引用本文复制引用
陈春谏,赵耀江,杨阳..不同加载条件下原煤力学渗流特性试验研究[J].煤矿安全,2018,49(1):9-12,4.
