Research and application of tri-proofing devices for bedding drilling construction
Gas borehole construction is the key method to reduce coal seam gas concentration and eliminate outburst risk in coal mines with high gas coal seams and the risk of coal and gas outburst risk.However,during the drilling process,a large amount of cinder and gas will gush out from the borehole,leading to the risk of frictional ignition,which seriously threatens the personnel safety at the work site.In order to avoid gas,coal dust,and fire hazards during drilling,we developed a CBS-2 type tri-proofing device,composed of sealing casing,cinder separation box,secondary gas and dust separation box,control valve and anti-jet and dust removal brush,etc.After application of the device,the gas concentration in the roadway,the gas concentration at the borehole,and the the dust was reduced by 77.8%,97.4%and 90%,respectively.The device meets the requirements of disaster prevention and control in the ordinary bedding drilling construction of underground mine,enhances the ability to prevent gas abnormalities,dust and fire during the underground drilling.The whole device is 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.
gas overrundrilling constructionCBS-2 typze tri-proofing devicesdisaster prevention and controldrilling dust control