GL-300Q Underground Core Drill Rig Description The GL-300Q Underground Core Drill Rig is a full-hydraulic split-type coring machine designed for underground mine and tunnel geological exploration. Powered by a 45kW electric motor, it provides 0-1000r/min spindle speed and 660Nm torque. It supports ±90° dip angle and 0°-360° azimuth angle drilling, compatible with AQ/BQ/NQ drill tools for wireline coring. Its modular separated structure is easy to transport and assemble in