The infiltration equation of coal bed under the cooperation of stress field, temperature field and sound field
JIANG Yong-dong
YANG Xing-yang
XIAN Xue-fu
XIONG Ling
YI Jun
Abstract：A self-explored testing system with controllable ultrasonic vibration for infiltration flow was used in coal bed.Studied the infiltrating characters of coal sample under the conditions with and without sound field effect. The research results show that with no sound field effect,when rock pressure,pore pressure and temperature keep stable,the infiltrating rate of coal sample decreases with confining pressure is mounting. With no sound field effect when axial stress,pore pressure and temperature keep stable, the infiltrating rate of coal sample increases with temperature goes up. When with the effect of sound field,axial strain, rock pressure and pore pressure keep certain, sound field effect can increase the infiltrating rate of coal sample,and the rate gets enlarged with the prolonging of time. The mechanics of enhancing coal bed infiltrating rate by adopting sound field effect comes mainly from soundwave mechanical vibration and thermal results.Based on the experiments, it was introduced out the empirical equation of coal gas infiltrating rate under stress, temperature field and sound field,build up an infiltrating equation under the operation of trifields.
Keywords：stress fieldtemperature fieldsound fieldcoalbed gasinfiltration equation
Publication Date：2010-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 434-438 )