Coal mine main ventilator switching method

The invention discloses a coal mine main ventilator switching method. The coal mine main ventilator switching method comprises the following steps that a test hole is formed in the side wall of an airduct on the air inlet side of each of a main ventilator A and a main ventilator B, the sizes of the test holes are adjusted according to the equivalent orifice principle, and the mine ventilation working condition is simulated. When the main ventilator A needs to be switched to the main ventilator B during normal operation, the main ventilator B is started in advance and operates for 30 minutes under the rated working condition, the technical parameters of all devices of a system B are detected, and after no problem exists, a test air door of the system B is closed, an air inlet door of the system B is opened, and mutual switching of the two main ventilators is completed. 一种煤矿主通风机切换方法，包括：分别在A、B两台主通风机进风侧的风筒侧壁上各开一个测试孔，根据等积孔原理，调节测试孔大小，模拟矿井通风工况。在A主通风机正常运行需切换至B主通风机时，提前启动B主通风机，并在额定工况下运行30分钟，检测B系统各设备的技术参数，无问题后，对B系统关闭测试风