An electronic detonator-based blasting method for ultra-deep and large-section vertical shafts

Abstract

The invention discloses an ultra-deep large-section vertical shaft one-time blasting forming method based on electronic detonators. The method includes the steps that firstly, the maximum blasting cubic capacity of each time of blasting is determined according to the section area, the rock expansion coefficient and the bottom compensation space size; then, the number of blasting times is determined according to the vertical shaft excavation volume and the maximum blasting cubic capacity of each time of blasting; finally, ultra-deep large-section vertical shaft one-time blasting forming based on the electronic detonators is carried out. The shaft section blasting area is divided into three blasting areas including the pilot shaft blasting area, the main body blasting area and the presplitting blasting area, the electronic detonators are adopted as detonating devices, long-time-delay and high-precision millisecond detonation of a large number of explosive cartridge groups is achieved based on the high-precision characteristic of the electronic detonators, from-bottom-to-top and from-inside-to-outside sequential or delayed detonation of the explosive cartridges is ensured, and the rock breaking or presplitting effect is achieved; meanwhile, as effective control over blasting vibration can be achieved through dosage scattering and precise detonation, one-time blasting shaft forming can be safely and reliably achieved.

Description

technical field [0001] The invention belongs to the technical field of shaft excavation and blasting, and in particular relates to a method for forming an ultra-deep and large-section shaft by one-time blasting using an electronic detonator. Background technique [0002] In the process of my country's economic construction, shaft excavation projects are indispensable, and the excavation projects of ultra-deep and large-section shafts are also increasing day by day, such as airport construction, port construction, power station construction, South-to-North Water Diversion Project, mining engineering and military engineering. [0003] There are four main methods of shaft excavation: forward blasting method / common method, reverse hanging / climbing tank blasting method, mechanical drilling method, and reverse deep hole blasting method. The current conventional methods are the forward blasting method and the reverse climbing / hanging tank blasting method. For these two types of bla...

AI Technical Summary

Problems solved by technology

The current conventional methods are the forward blasting method and the reverse climbing / hanging tank blasting method. For these two types of blasting methods, the workers must be exposed to the blasting work face, and many tedious and laborious processes must be carried out on the blasting face. Its high cost, low efficiency, poor working conditions, low safety and reliability, etc.

The mechanical drilling method, that is, the shaft drilling rig method, although the workers do not need to be exposed to the blasting work face, the working environment is good, the operation is safe, and the efficiency is high. The cost is high, and the promotion of its application is limited

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