We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
温度对采动作用下含瓦斯原煤力学和变形的影响.
- Authors
廖雪娇; 蒋长宝; 段敏克; 田维军
- Abstract
Taking raw coal as object, by using self-made “thermal-hydro-mechanical coupled with triaxial servo-controlled seepage apparatus for containing-gas coal”, the effect of temperature on the mechanical properties of containing-gas raw coal was studied under constant confining pressure and unloading confining pressure. The results showed that: 1) Under the same initial confining pressure, gas pressure and temperature, compared with the constant confining pressure, the yield stage of the coal under unloading confining pressure is shortened. Besides, its peak stress and associated axial strain decrease, the transverse strain rate increases, and the evolution processes of its lateral expansion ratio and deformation modulus are accelerated. 2) Under the same initial confining pressure and gas pressure, with the increase of temperature, the strength of coal under unloading confining pressure decreases, the axial strain at peak stress, the absolute value of the transverse strain and volumetric strain decrease, and the lateral expansion ratio and the deformation modulus increase. 3) The risk of coal unstable failure and coal and gas outburst becomes higher under high temperature environment, leading to more strict requirements for the support of coal face roadway and the control of coal and gas outburst.
- Subjects
COAL mining; SEEPAGE; PRESSURE measurement; STRESS-strain curves; GASES at high temperatures; MATHEMATICAL models
- Publication
Journal of Northeastern University (Natural Science), 2017, Vol 38, Issue 9, p1347
- ISSN
1005-3026
- Publication type
Article
- DOI
10.12068/j.issn.1005-3026.2017.09.027