Ezperimental study of anisotropic strain behavior of coal
The anisotropic strain behavior of two coal samples collected from the Surat Basin, Australia were tested using a high pressure, true triaxial stress coal permeameter (TTSCP). The linear strains due to gas sorption, temperature and stress changes were measured at six directions, i. e. 0°, 60°, 120°, 180°, 240°. The effects of temperature on gas desorption rate and strain behavior were analyzed, and the directional thermo-expansion coefficients were calculated for these two coal samples. The desorption-induced coal shrinkage and swelling were investigated as well. The relaxation coefficients of coal sample were obtained by analyzing the coal swelling during de-stress of coal. The study results suggested that the mechanical and thermo-mechanical properties of coal are highly anisotropic, which is important for coal seam gas production and coal mining.
coal shrinkage and swelling anisotropic strain thermo-ezpansion coefficient
X.R.Wei P. Massarotto V.Rudolph S. D. Golding G.X.Wang
Division of Chemical Engineering, The University of Queensland, Brisbane, QLD, 4076, Australia Division of Earth Science, The University of Queensland, Brisbane, QLD, 4076, Australia
国际会议
徐州
英文
208-217
2009-09-24（万方平台首次上网日期，不代表论文的发表时间）