Static blasting hole blowout prevention inventing method

A static blasting and anti-blowout technology, applied in blasting and other directions, can solve the problems of life and health threats of construction workers, injuries caused by breaking agent spraying, and reduction of heat release rate, etc., and achieve the effect of small error, high accuracy and simple method.

Active Publication Date: 2017-05-31
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Abstract
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Problems solved by technology

[0004] However, because this method carries out exothermic reaction in a narrow space, it has also been verified from actual engineering practice. This method is easy to cause the phenomenon of spray holes, so that the high-temperature silent breaking agent sprays out and hurts people, causing serious damage to the life and health of construction workers. huge threat
The existing blowout hole method mainly changes the chemical composition of the static blasting agent, thereby reducing the heat release rate and achieving the purpose of the blowout hole, but the cost of this special static blasting agent is relatively high

Method used

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  • Static blasting hole blowout prevention inventing method
  • Static blasting hole blowout prevention inventing method
  • Static blasting hole blowout prevention inventing method

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Embodiment Construction

[0043] The method of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation examples.

[0044] Such as figure 1 Shown is an example device for static blasting vents. The hole 1 described in the figure has a diameter of 29mm and a height of 300mm. The steel pipe 2 is made of 304 stainless steel. The adopted method of static blasting vent hole includes the following steps:

[0045] Step 1: Obtain the mass of water required to lower the silent breaker from 100°C to 70°C, and obtain it according to the following formula:

[0046] Q=cm(t 2 -t 1 )

[0047] In the formula, Q------heat generated by SCA, KJ;

[0048] c-------Specific heat capacity of water, J / (kg℃);

[0049] m------water mass, kg;

[0050] t 2 Take 100℃, t 1 Taking 70°C, calculate that the mass of water needed to lower the temperature from 100°C to 70°C is about 20g, that is, the volume of water required is 2.0×10 -5 m 3 , t...

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Abstract

The invention relates to a static blasting hole blowout prevention inventing method, and belongs to the field of engineering blasting. The method mainly solves the essential problem that when a static blasting fracture expanding agent is hydrated, a large amount of hydrating heat is generated, radiating of surrounding media is slow, and therefore hole blowout is caused. The device which uses the characteristic that specific heat of water is large to absorb redundant heat, and consequently the aim of hole blowout prevention is achieved is manufactured. During construction, a cylindrical steel pipe is filled with water to be placed into a hole, then the position between the pipe and the blasting hole can be filled with the static blasting fracture expanding agent, and construction is completed. Temperature and strain measurement is carried out in the embodiment, the aim of being free of influences on blasting while achieving hole blowout prevention is completely achieved. The method is based on the physical cooling principle, the hole blowout phenomenon is successfully avoided, the method is simple and feasible, cost is low, and the high innovativeness is achieved.

Description

technical field [0001] The invention belongs to the field of engineering blasting, and in particular relates to a static blasting anti-spray hole invention method. Background technique [0002] The solid expansion with the silent breaking agent as the carrier will also emit a sound of a few decibels when it is rigidly broken, but it cannot be heard by ordinary people, so it is called static blasting. Silent breaker is cement-like expansive gelling material, which reacts with water to form solid-phase volume-multiplied crystals, making the width and depth of the cracks of the crushed objects continuously expand, resulting in the brittle objects cracking and shattering. [0003] This new static blasting method has been expanding its application range since its invention. It is mainly used in the construction industry, mainly for the crushing of concrete structures and rocks; on the other hand, it is used for cutting stone materials. It is widely used because of its low noise...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D5/00
CPCF42D5/00
Inventor 解北京杨潘赵泽明
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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