To have better understanding of the interaction mechanism for rock deformation and methane gas flow
moreTo have better understanding of the interaction mechanism for rock deformation and methane gas flow, the testing research on the effect of the effective stress on coal specimen under the action of 3-dimensional compression have been specially designed for this study. The triaxial compression tests to coal specimen containing methane gas are carried out with various confining stress and pore pressures. The result of this test showed that the empirical equations for effective stress coefficient are a bilinear function of variable with overall stress and pore pressure. The empiric equations can depict the dynamic deformation behavior of gassy coal under the action of pore pressure.
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