A large-aperture static blasting method and hole-blocking device thereof

Abstract

The invention discloses a large-aperture static blasting method and a hole plugging device thereof. According to the hole plugging device, a taper body is arranged inside a housing, four taper pins are arranged inside four holes formed in the housing, springs are sleeved outside the taper pins and snapped inside the housing, and a bolt is connected with the taper body through the threads inside the taper body. The method includes, firstly, determining the hole pattern parameters of a large-aperture static blasting design scheme according to the mechanical parameters of a body to be blasted, drilling blast holes 0.5-1 m deep through a phi 76 mm drill; then utilizing a hydraulic expanding drill to expand the lower diameter of the blast holes to phi 101 mm; then uniformly mixing explosive agent and water at a ratio of 4:1-3:1, and filling the blast holes of phi 101 mm; plugging the blast holes through the hole plugging device and sealing the blast holes with gravel and soil. The large-aperture static blasting method and the hole plugging device thereof effectively solve the punching problem during static blasting, enable the static blasting technique to be applicable to large-aperture blast holes of more than 50 mm, effectively reduce blasting waiting time and accordingly improve the efficiency of static blasting.

Description

technical field [0001] The invention relates to a rock blasting excavation construction method and a device thereof, in particular to a large-aperture static blasting method and a hole plugging device, and belongs to the technical field of earthwork construction techniques and methods. Background technique [0002] With the development of modern economic and social capital construction, urban construction rises rapidly. From the viewpoint of effective use of urban land, the basic policy of construction will be to demolish old and build new and rebuild projects. Since this type of project is often carried out in places with dense population and concentrated buildings, it is required that there will be no noise, no vibration, no flying stones and other public hazards during the construction process, and the safety of nearby residents will not be endangered. However, traditional construction methods are often unsatisfactory. In some special construction sites, due to various c...

AI Technical Summary

Problems solved by technology

In my country, the Cement Science Research Institute of the China Academy of Building Materials Science took the lead in developing the static breaking agent in 1981; The foundation of the two equipment in the factory is 150m 3 ; Gong Youman et al. introduced the experiment of static blasting under water in "Study on Static Breaking Experiment in Liujiang Waterway Improvement Project". The experiment found that the "small hole diameter and close spacing" hole arrangement method has a better rock breaking effect, while Experiments with 80mm blastholes will cause punching, which is not suitable for underwater static blasting operations; You Baokun systematically expounded the static blasting technology in the book "Static Blasting Technology - Silent Breaker and Its Application". Principles, application methods, and engineering examples; Gao Rongqing put forward the causes and influencing factors of punching (spray) in "Research on Static Blasting Spray", and analyzed the agent, ambient temperature, hole wall properties, aperture, water-cement ratio etc. on punching, especially when the hole diameter is greater than 50mm, the breaking agent in the hole is sprayed out, and punching occurs, so it is difficult to apply in engineering

[0004] The existing static blasting technology is small-aperture static blasting, and the blasthole diameter is between 30mm and 50mm. Once the aperture is too large or the temperature is too high, dangerous punching will easily occur, 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 and slow response speed, and the construction efficiency is low.

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