Study On Application Of Tracer Gas To Diagnosis The Airflow In Mine

In order to optimize underground ventilation system,firstly,this paper analyzed the precision of Xing fu mine ventilation network using MIVENA ventilation network system.According to the calculation results,the flow path and the distribution of air flow in the tunnel and the related parameters are given.The instantaneous release tracer gas method was taken in complex ventilation network in Xing fu collery.Choose different locations at different times and instantaneous release a certain amount of SF6 gas,and by detecting and recording instrument for high precision continuous access to the release point tracer gas in return wellhead time concentration distribution value.According to the single roadway advection diffusion equation and the theoretical concentration solution,for complicated underground ventilation path,pushing export tracer gas concentration in through the different basal area,a plurality of roadway air flow rate in different wind speed and different coefficients of friction concentration solution of integral type and in developing FORTRAN concentration solution procedure,is simulated using the theory of the ventilation path tracer gas concentration distribution value.By comparing the measured value and simulated value of the tracer gas concentration,the wind velocity and dispersion coefficient of the tunnel were modified,and the actual dispersion coefficient and the actual mean velocity of each ventilation path were obtained.On the basis of further analysis to examine the out there is leakage range where the mine ventilation system,ventilation system optimization and underground environmental safety planning provides a reliable theoretical basis.