Research on mine acoustic wave transmission technology

Abstract

Abstract In view of the present coal mine underground majority drilling construction still uses the non-directional drilling technology in present situation, it is proposed to use the propagation characteristics of sound waves in acoustic drill rods to study the mining data transmission technology based on acoustic wave transmission to make up for the existing drilling while drilling. Insufficient transmission mode by studying the propagation characteristics of sound waves in the drill pipe, revealing the law of amplitude attenuation and residual wave variation of the acoustic signal in the drill pipe, determining the signal transmission frequency and amplitude; considering the actual working conditions of the coal mine, designing a rare earth based the explosion-proof transducer of giant magnetostrictive material is used as the signal source. Finally, the reliability of the transmission scheme and signal source is verified by the signal transmission simulation test.