The numerical value simulation study on the methane controlling of the upper corner of the gob with equal-press method
LI Zongxiang1, SUN Guangyi2, WANG Hongde1(1.Liaoning Technical University, Fuxin 123000, China; 2.Heilongjiang Science and Technology Institute, Jixi 158105, China)
With upwind finite element numerical value imitation method and the graphics mode, the author show the hydromechanics principle that methane gathered in upper corner of the gob, and has pointed out that the methane overrun in upper corner of the stope chiefly is because methane accumulation of the upper corner of the gob directly perceived on theory. Combinating the example analog computation, we discovered that we shuold press the wind gap thoroughly inside the gob when contorlling methane in upper corner of the working face with local fan in returnwind side, its pressure amount of wind with reasonable the nozzle seat assumes the inverse propotion relation. All having given out that the change circumstances of the methane distribute around equalpress to pour wind, the focal point has been inquired into the problem of definite reasonable pressure amount of wind and the nozzle seat with the method of the numerical value simulated test.6figs.,6refs.