Drilling slag separation and transfer system and method for underground air directional drilling in coal mine

The invention relates to a drilling slag separation and transfer system and method for underground air directional drilling in a coal mine. The drilling slag separation and transfer system is composedof a first separation device, a second separation device, a transfer device and a separation and transfer vehicle body, mine gas extraction negative pressure is taken as power, active suction of thenegative pressure avoids leakage of polluted air containing the drilling slag and gas; the first separation device is used for separating large particles of the drilling slag in the air; the second separation device is used for separating medium and fine particles of the drilling slag, and removing harmful methane gas; and the transfer device is used for transferring the drilling slag efficientlyand discharging clean air. The drilling slag separation and transfer system has the remarkable characteristics of no pollution air leakage in the process of treatment, avoiding gas over limit, automatic transfer of the drilling