Abstract: In order to study the distribution of dangerous zones under the state of goaf drainage and buried pipe, we use Fluent software to establish model and compare the simulation results with the measured data, and obtain the effect of buried pipe extraction on distribution of oxygen concentration and gas concentration in goaf. The results show that buried pipe is in deep mined-area 10 m at 4208 working face, with the advancing of working face, and buried pipe is into the mined-out area with it; with the flowing of airflow and under the influence of drainage negative pressure, air-leakage intensity at upper corner is relatively large; the distribution of oxygen concentration is wide in intake air side, and a relatively narrow range in the return air side; gas concentration is higher in deep return air side.