High gas and coal and gas protrusion risk mines mainly use various types of gas boreholes to reduce coal seam gas concentration or eliminate protrusion risk. However, during the drilling process, a large amount of cinder and gas will gush out from the borehole, and there is a risk of frictional ignition, which seriously threatens the safety of the workers at the work site. In order to avoid gas, coal dust, and fire hazards during drilling, we developed a CBS-2 type triple prevention device, which is mainly composed of sealing casing, cinder separation box, secondary gas and dust separation box, control valve and anti-jet and dust removal brush, etc. Through on-site application, the actual gas concentration in the roadway is reduced by 77.8%, the gas concentration at the orifice is reduced by 97.4%, and the dust reduction amplitude is over 90%. The device meets the requirements of disaster prevention and control in the drilling construction of ordinary down-hole mine, improves the ability to prevent gas abnormalities, dust and fire during the construction of underground mine drill holes. All controls of the whole device are controlled by pneumatic valves, which can quickly improve the efficiency of gas discharge and also lay the foundation for the improvement of electric automatic control at a later stage.