Large-hole-diameter static blasting blowout prevention device and using method thereof

Abstract

The invention provides a large-hole-diameter static blasting blowout prevention device and a using method thereof. The large-hole-diameter static blasting blowout prevention device comprises a pushingrod and a water filling pipe, wherein four rectangular grooves are uniformly formed in the outer circle of the lower part of the pushing rod along a circumferential direction; guide grooves are formed in the bottoms of the rectangular grooves along a radial direction; positioning blocks are slidably arranged in the rectangular grooves; the inner end surfaces of the positioning blocks are fixedlyconnected with guide pillars extending into the guide grooves; the guide pillars are sleeved with springs; two ends of springs are in contact with the bottoms of the rectangular grooves and the innerend surfaces of the positioning blocks; the water filling pipe penetrates through the pushing rod; and the lower end of the water filling pipe extends downwards out of the pushing rod. Through the large-hole-diameter static blasting blowout prevention device, the amount of a crushing agent filled in single hole is high; the crushing energy is high; the expansion pressure on the hole wall is high;the problem of blowout in the large-hole-diameter static blasting is effectively solved, so that the static blasting technology can be applied to the situation of large-hole-diameter blasting with hole diameter being greater than 50mm; meanwhile, the warm water is filled and is used for providing external environment of acceleration of hydration reaction for the static crushing agent; the reactiontime is shortened; the waiting time of blasting is reduced; the static blasting efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a large-diameter static blasting anti-spout hole device and a method for using the same. Background technique [0002] Static blasting mainly refers to the use of silent breaking agent (also known as static breaking agent). The main component of the blasting agent is an inorganic compound calcined at high temperature with calcium oxide as the main body, mixed with an appropriate amount of admixture and ground together with high expansion. Performance non-explosive crushing of powdered materials. Static blasting does not produce noise, vibration, dust and other public hazards, and can crush and disintegrate rocks or concrete structures calmly and safely. It has been widely used in the demolition of urban buildings and structures, mining of precious stones, and tunneling without blasting. [0003] The existing static blasting technology mostly adopts small-ap...

AI Technical Summary

Problems solved by technology

[0003] The existing static blasting technology mostly adopts small-aperture static blasting, and its drilling diameter is between 30 and 50 mm. Once the drilling diameter is too large or the temperature is too high, dangerous spray holes will easily occur (static breaking agent injection). The phenomenon of sudden ejection after entering the borehole), affecting construction safety and construction progress

At the same time, compared with large-aperture static blasting, small-aperture static blasting has problems such as small expansion pressure, slow response speed, and low construction efficiency.

At the same time, the hydration reaction of the crusher is greatly affected by the temperature. When it is below 0 ℃, the hydration reaction is too slow; at 40~50 ℃, the hydration reaction is fast, but it is easy to spray holes.

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