Research on Technology of Fast Speed Drill Pipe Bit Based on Breaking Roadway Floor Ore-forming

For hole grouting of breaking roadway floor,the fast speed drill pipe bit of roadway is developed based on breaking roadway floor.According to structure and working principle of fast speed drill pipe bit,the research and design of which is carried out,and industrial test is carried out according to first support and secondary support in softrock roadway.The results showed that: drilling construction is convenient,the drill borehole depth is 1 500～2 500 mm which reached the design requirement and which provide a guarantee for construction in special conditions of roadway and underground engineering and which has remarkable economic benefits.