The energy evaluation model of coal and gas outburst intensity

Abstract：Considering the similarity of the process energy dissipation of coal and gas outburst and rock blasting mech- anism, an energy evaluation model of coal and gas outburst intensity was established. At the same time, the outburst coal crushing power and internal energy of outburst gas expansion were calculated by using new surface theory and the laws of thermodynamics. By analyzing the 38 coal and gas outburst intensity during 1960--2010 ,the results show that gas expansion energy is more than the broken power 1-2 orders of magnitude in half of outburst amount, so only using the quality of coal thrown to evaluate coal and gas outburst intensity is unreasonable, and The energy intensity of coal and gas outburst evaluation model considered the prominent during the crushing of coal power and gas expansion ener- gy is more reasonable. The coal and gas outburst is converted into the total energy released by TNT equivalent, accord- ing to different standards of TNT equivalent magnitude, the intensity of the type of coal and gas outburst is divided into type C (less than 1 t of TNT equivalent values) ,type B (1-10 t of TNT equivalent value) and type A (more than 10 t of TNT equivalent value).