《煤矿安全规程》第１２７条规定，生产矿井主要扇风机须装有反风装置，当矿井发生灾害时，必须能在１０分钟内改变巷道中风流方向。规程还规定每年应进行一次反风演习，以检验反风设施的完好情况。七五煤矿设计生产能力为６０万ｔ／ａ，矿井通风方式为中央分列式。主扇风... Article 127 of the Code of Coal Mine Safety stipulates that the main fans of the production mines shall be equipped with anti-wind devices. When a mine disaster occurs, the direction of the airflow in the roadway must be changed within 10 minutes. The procedure also stipulates that an anti-wind exercise should be conducted each year to check the integrity of the anti-wind facilities. The design and production capacity of Qili Coal Mine is 600,000 t / a. The ventilation mode of the mine is the central sub-type. The main fan ...