Large-aperture efficient static blasting auxiliary orienting device and static blasting construction method thereof

Abstract

The invention discloses a large-aperture efficient static blasting auxiliary orienting device. The large-aperture efficient static blasting auxiliary orienting device comprises a first semi-circular tube, a second semi-circular tube, a guide partition and a tapered plug, wherein the guide partition is arranged inside the first semi-circular tube and the second semi-circular tube, and the two sideedges of the guide partition separately extend into vertical connecting beams between the first semi-circular tube and the second semi-circular tube; the lower end of the guide partition is flush to the lower end of the first semi-circular tube; and the tapered plug is blocked into an upper end opening of the first semi-circular tube and an upper end opening of the second semi-circular tube. The invention further discloses a static blasting construction method for the large-aperture efficient static blasting auxiliary orienting device. Blasting guide effect is achieved by utilizing stress concentration effect, generated on a semi-circular steel tube and a steel plate with a blade, by expansion pressure of an static cracking effect; single-hole one charge amount is great, expansion pressureis great, crushing ability is improved, cracking time is greatly shortened, and crushing efficiency is remarkably improved; and meanwhile, a hole-spraying phenomenon of the static cracking agent is effectively solved, safety is good, operation is simple, practicability is high, repeated use can be realized, and range of application is wide.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a large-aperture high-efficiency static blasting auxiliary orienting device and a static blasting construction method thereof. Background technique [0002] Static cracking agent (Soundless Cracking Agent, SCA) is essentially different from explosives, high-energy combustion agents, etc. in material composition and physical and chemical properties. Explosives and high-energy incendiary blasting generate thousands of atmospheric pressures and high temperatures of 2000-5000 °C in an instant through gas expansion, causing severe damage to the surrounding media. The silent breaker is a cement-like expansive gelling material. It reacts with water to form a crystal that doubles the volume of the solid phase. The formation of this crystal will exert an expansion pressure on the hole wall. The expansion pressure of the static breaker is generally 30-40 MPa. , and e...

AI Technical Summary

Problems solved by technology

However, when the borehole diameter is larger than 50 mm, SCA hydration will generate a large amount of water vapor, which will cause the breaking agent in the hole to spray out, and the hole phenomenon will occur. Therefore, when performing static crushing with a large hole diameter (above 50 mm), the device The orifice is covered and blocked

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