Theoretical Analyses And Model Experiment Of Water Layer Radio And Time Of Blasting Action In Column Charge Blasting

The method of strengthening the charging at the bottom of the blasting-hole is usually described in traditional teaching-books and blasting engineering, which is used to overcome resistance at the bottom. It is known to its shortage and hurt. Water uncoupling charge is new blasting technique, which is based on the theory of rock crash and the medium is wrecked when the blasting explosive energy releasing, also considering water can weaken Shockwave peak. Substantial evidence, this charge is propitious to fragmentation, fall shake, reduce noise and control slung shot.Water medium uncoupling charge can be divided into radial uncoupling charge and axial uncoupling charge, people had studied the mechanism of the radial uncoupling charge, including the best uncoupling radio and the energy distributing, there are less research in axial, the most is practice in project, there are much less research on the mathematic analysis and calculation in the thickness of water layer and the best water layer radio. Nobody research the time of action which is press by the Shockwave and the offspring of the blasting explosive. Developing the theory of rock dynamics and experimentation condition, it is known to the characteristic of rock dynamics and dynamic damnification rupture in high strain rate, the time can be measure by the dynamic test technique, which is the Shockwave and the aftergases of the blasting explosive, the accurate research is possible thorough...