Investigation into mechanical responses and ennergy dissipation properties of coal containing methane to confinement unloading
Abstract：A series of confinement unloading tests were performed on coal specimens containing gas using a servo-con- trolled Triaxial Stress Thermal-hydrological-mechanical Coal Gas Permeameter to investigate the gassy specimens' me- chanical responses and energy dissipation characteristics. Experimental results show that the speed of unloading the confining the speed be related correlated pressure is positively related to the instability process of gassy coal. A coefficient,reflecting the influence of of unloading confinement on the mechanical behavior of coal, is defined accordingly which has been found to exponentially to the confinement unloading speed. The speed of unloading confining pressure is negatively to strains with methane gas pressure and differential pressures being constant, suggesting that an increase in the unloading speed means a decreasing strains at failure. In addition, the confinement unloading decreases with a mounting confinement unloading amount of energy dissipated in the process of speed.
Keywords：coal containing methaneunloading confining pressuremechanical propertiesenergy dissipation
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 1505-1510 )