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水力冲孔常用的是多孔喷头体(含有2个及以上喷嘴的钻头)。当传统喷头的破煤量不能达到要求时,经过理论计算分析,设计出了单喷嘴冲孔钻头,并在大淑村矿172107底抽巷实施穿层水力冲孔试验。结果发现,设计的直径为Φ5 mm的单喷嘴钻头,冲煤量大,出煤均匀,为井下卸压消突提供了可靠的技术支持。
Hydraulic punching is commonly used porous nozzle body (containing two or more nozzles drills). When the traditional nozzle of the coal can not meet the requirements of breaking through the theoretical calculation and analysis, designed a single nozzle punching bit, and the Dafu Village Mine No. 172107 Road Drainage to carry out piercing hydraulic punching test. The results show that the design of a single-nozzle Φ5 mm diameter drill bit, flushing coal, uniform coal, the relief for the underground pressure relief provided a reliable technical support.