Research progress on response of gas competitive adsorption characteristics on coal microstructure at different temperatures

Abstract

The compound hazard of gas and coal spontaneous combustion in underground coal mines is a major factor limiting the safe production of coal mines, and the oxidation characteristics of coal spontaneous combustion of residual coal in the mining area are closely related to the residual gas and the starting temperature. We reviewed the research progress of solid-gas adsorption theoretical models, systematically analyzed the research methods, experimental platforms and recent progresses involved in the competitive adsorption characteristics of multi-gas, microscopic pore structure evolution and microscopic group evolution characteristics of gas-bearing coal at different temperatures by domestic and foreign scholars, and discussed the characteristics of pore characteristics changes and the evolution laws of macromolecules and functional groups of coal under different temperature conditions.

Keywords

• multi-component gas
• coexisting hazards
• methane-containing coal
• competitive desorption
• pore distribution
• microgroups