科研之友
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摘要
The mechanical property of gas-filled coal is a fundamental research in the field of gas disaster prevention. The original gas-filled coal is a typical non-uniform and multiphase medium, which is composed of the porous solid skeleton with non-uniform spatial distribution, free gas in the pore and the quasi-liquid adsorption gas presented in the pore surface. Changes of behaviors and mechanical performance are very complex. In order to describe the physical and mechanical properties of gas-filled coal from the perspectives of mathematics and mechanics, we established a meso-statistical damage constitutive model of gas-filled coal adopting the research method of meso-damge mechanics and proposed the solving approach to model parameters by using acoustic emission data obtained from meso-mechanical experiments of gas-filled coal.
The model was established fully considering the characteristics of solid and gas coupling of gas-filled coal based on Weibull theory and Mohr-Coulomb rule and the effective stress principle of solid-gas coupling of gas-filled coal was taken into account. Advantages of this model are: reflecting the properties of microscopic inhomogeneous and nonlinear deformations, combining damage variable and damage evolution equation with acoustic emission, which provides a comparatively clear physical engineering background.
- 出版日期2012-10
- 单位重庆大学
