Deep tunnel peripheral hole blasting experiment device and method based on metal wire electric explosion

Abstract

The invention discloses a deep tunnel peripheral hole blasting experiment device and method based on metal wire electric explosion, which are applied to the field of deep rock tunnel excavation and forming and comprise an insulating rod, a positive electrode, a negative electrode, a metal wire, a mold and a base, vertical grooves are formed in the two ends of the insulating rod, transverse through holes are formed in the positions, close to the ends, of the insulating rod, the positive electrode and the negative electrode are installed in the vertical grooves in the two sides of the insulating rod, the positive electrode penetrates through the through holes of the insulating rod, the two ends of the metal wire are welded in slotted holes in the ends of the two electrodes, the mold is detachable, and an electroplated layer is arranged on the inner surface of the mold. The base is formed by combining and fixing the first model, the second model and the base through bolts; shock waves generated by electrical explosion of metal wires under high-voltage pulses are used for simulating shock waves generated by explosive explosion in tunnel blasting, the peripheral hole blasting simulation experiment device and method in deep tunneling are designed, and indoor blasting experiments of various tunnel models under different dynamic and static load coupling conditions are achieved.

Description

technical field [0001] The invention relates to the technical field of excavation and forming of deep rock tunnels, in particular to an experimental device and method for simulating peripheral hole blasting of deep buried tunnels based on wire electric explosion. Background technique [0002] At present, the drilling and blasting method is the main method of rock-breaking excavation in deep tunnels. The shock wave and blasting gas generated by the explosion of explosives are used to act on the surrounding rock mass to cause fragmentation and damage. The blasting process includes notch blasting and auxiliary blasting. and blast around. Perimeter blasting is the key to controlling surrounding rock damage, tunnel formation, and forming a smooth surface. Experts and scholars at home and abroad have done a lot of experimental and theoretical research on smooth surface blasting of peripheral holes, laying a solid theoretical foundation for the application and promotion of smooth...

AI Technical Summary

Problems solved by technology

[0003] With the continuous increase of tunnel depth, the influence of high ground stress environment on the construction quality and efficiency of traditional smooth blasting has become more and more prominent. Surface blasting theory is only applicable to the excavation and formation of shallow buried tunnels

Explosives have problems such as high risk, poor controllability, and strict control of their use, making it impossible for most universities and scientific research institutions to use similar materials for indoor blasting experiments.

Problems such as low repeatability, high cost, poor safety, and difficult statistical analysis of data in in-situ experiments also become more prominent as the depth increases

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