A Blasting Method for Bunch Blast Hole Cutting Using Ordinary Detonator Random Delay Error to Reduce Vibration

Abstract

The invention discloses a beam-shaped blast hole cut blasting method for reducing vibration by using random delay errors of common detonators. Firstly, a reasonable arrangement mode and a charging structure of blast holes in a cut blasting area are selected according to the properties of on-site ore rock, the blast holes in the cut blasting area at least comprise a plurality of beam-shaped blast holes positioned in the middle of the cut blasting area, the common millisecond delay detonators with the same section are adopted as the detonating detonators of the beam-shaped blast holes, and short-delay blasting between the detonators at the same section of the beam-shaped blast holes is realized by utilizing the random delay errors between the common millisecond delay detonators at the same section. According to the method, the short-delay blasting mode is formed by utilizing the random delay errors of the common millisecond delay detonators, the reasonable detonator sections are scientifically selected through a Monte Carlo simulation method, the beam-shaped blast hole cut blasting method with the blasting vibration harm controlled is realized, the cut blasting effect can be guaranteed, the blasting vibration effect can be reduced, and the low-cost common millisecond delay detonators can be scientifically and reasonably adopted as the detonating detonators.

Description

technical field [0001] The invention belongs to mine blasting technology, and in particular relates to a beam-shaped blast hole cutting method, in particular to a beam-shaped blast hole cutting blasting method which utilizes a random delay error of an ordinary detonator to reduce vibration. Background technique [0002] In the process of large-diameter deep hole stope mining, the stope cutting raised well is used as the compensation space and free surface for subsequent side avalanche blasting, which is the key link to ensure the normal and efficient recovery of the entire stope, and has important engineering value. As the most popular safe, high-efficiency, and low-cost raise excavation method in the production of large-diameter deep-hole stope, beam blast hole cutting blasting method has been adopted by many mines at this stage. However, this method of raise excavation The blasting technology adopted has always been troubled by two opposites, the cutting effect and the pre...

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is: aiming at the poor economy of vibration reduction in short-delay blasting using electronic detonators, a beam-shaped blast hole cutting blasting method that uses random delay errors of ordinary detonators to reduce vibration is provided.

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