【摘要】 本文叙述了一种在空气媒质中的声回波测距方法,研制了全集成化的声波炮孔测深仪器,特别是在复杂的岩石条件下,如何抑制裂隙或夹石对回波的干扰和识别孔底回波,采取了对策。更多还原

【Abstract】 Based on actual measurements, the authors made a comparison between the two seismic wave forms produced by millisecond delay blasting and simultaneous blasting, evaluated the principal . empirical formulae for calculating blast vibration velocity, and pointed out that in the empirical formulae the coefficient K and attenuation index a would vary with different blast methods and initiation ways. Finally, the authors also discussed the effect of the time-interval of milli- second delay blasting on vibration intensity.更多还原