Experimental And Theoretical Studies On Longwall Mining Impact To The Gas Movement In Solid Coal

After summarized the characteristics of early time coal gas adsorption-desorption experimental system, author design and developed the3D stope gas delivery law simulation experimental system, provide a new way for doning methane adsorption-desorption experiment. By use of this new experimental system, we doing a series experiments about big size coal body methane adsorption-desorption, temperature curve in desorption experiment, and do the methane adsorption-desorption experiments with mining influence in the first time. the value of unit mass gas adsorbed quantity of big size coal is1/10of pulverized coal’s value;The methane adsorption capacity of big size coal is similar to the parabola; Gas desorption process is an endothermic process the monitoring of experimental coal temperature gradual decline in the form of a parabolic function; Desorption velocity of adopts to move is faster than natural desorption velocity, and have a deeper desorption degree. According to the experiments research, numerical simulation and theoretical derivation, we established the equations about air-methane mixture gas delivery law in mining influence, and presented the definite conditions.