Since the 1980s, foreign scholars b

Since the 1980s, foreign scholars began to carry out experimental research on the mine (wesely, Germany, 1984 [3]; Uchino & Inoue, Japan, 1997 [4]) and obtained the distribution of tunnel air flow. Tomita Shinji, Inoue Masahiro, et al. Conducted a simulation experiment on the gas emission from the driving face, measured the gas concentration distribution, and believed that the location of the air duct outlet had a greater impact on the air flow field [5-8]. Paul, Bradley C, procarione, J.A., McCarter, M.K. of Judas state in the United States proposed a numerical method to describe the gas concentration and temperature distribution by establishing the airflow distribution model of the mined strata [9]. K.w.moloney, i.s.lowndes and others from the University of Nottingham in the UK have studied the distribution of air flow measured in the model of underground single head roadway under auxiliary ventilation, and verified the results obtained by johanvan Heerden, a scholar from South Africa, using numerical methods [10]. Rao et al. Of Australia established a three-dimensional model to simulate the airflow field in the long wall working face and the movement track of particles near the shearer drum [11].