Rapid construction method for deep hole blasting of vertical shaft frozen bedrock

Abstract

A rapid construction method for deep-hole blasting of frozen bedrock in shafts, in particular to a construction method for rapid excavation of deep-hole blasting in deep holes around bedrock after vertical shafts are frozen without affecting the safe operation of frozen layers or frozen pipes . It overcomes the shortcomings of low efficiency, long construction period and high cost caused by shallow hole blasting in general, and provides a construction method of deep hole differential blasting in bedrock combined with vertical shaft freezing method. A deep hole is formed in one drilling, and the peripheral hole is divided to form a peripheral eye charge structure, which realizes the micro-difference smooth surface blasting in the hole, thereby reducing the blasting vibration and effectively protecting the safety of the frozen pipe and the frozen wall. The drilling and blasting efficiency is improved, the construction progress is accelerated, the construction period is shortened, and the efficiency of equipment mechanization can be exerted.

Description

technical field [0001] The invention relates to a rapid construction method for deep-hole blasting of frozen bedrock in a shaft, in particular to a rapid excavation of differential smooth blasting in deep-hole holes around the bedrock after the shaft is frozen, which does not affect the normal operation of a frozen layer or a frozen pipe. construction method. Background technique [0002] The frozen bedrock of the shaft is constructed by the drilling and blasting method, and the safety of the freezing pipe must be ensured to prevent the freezing pipe from breaking and the brine flowing out and rapidly melting the freezing wall, and the pipe cannot be used for further freezing; Water flooding into the wellbore causes flooding accidents. Therefore, "Coal Mine Safety Regulations" (2014 Edition), "Code for Construction of Coal Mine Roadway Engineering" and "Code for Quality Acceptance" (GB50511, GB50213-2010), "Code for Acceptance of Construction Quality of Metallurgical Mine R...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of low efficiency, long construction period and high cost caused by shallow hole blasting in order to prevent the frozen layer or frozen pipe from being damaged in the above-mentioned vertical shaft freezing blasting construction, thereby providing a shaft freezing method The construction method of bedrock deep hole differential blasting is adopted. This method forms a deep hole during one drilling, and the su

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