ABSTRACT
The most efficient dust and slurry collector [103] is 0.08 m high circular cylinder fitting with a lateral opening equal to a drill rod in diameter 0.03 m and an exit branch to connect to the draft booster. The problem is to determine the volume of suction air that would enable efficient separation of dust and slurry generated in the course of drilling. We will disregard air leaks in a circular clearance around the drill rod that would reduce the problem of describing the field of velocities in the dust and slurry collector to the 2D form.
