Method for determining axial decoupling coefficient of charge structure of cavity in bottom of hole

A coupling coefficient, hole bottom technology, applied in blasting and other directions to ensure the effect of feasibility

Inactive Publication Date: 2019-09-20
湖北三鑫金铜股份有限公司
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Problems solved by technology

[0002] In the field of engineering blasting, in order to overcome the resistance of the bottom, eliminate the root, and improve the blasting effect, the method of super-deep reinforced charge at the bottom of the hole or the method of using strong explosives at the bottom is usually adopted. However, when excavating the protective layer of permane

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  • Method for determining axial decoupling coefficient of charge structure of cavity in bottom of hole

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[0026] The technical solution of the present invention will be clearly and completely described below, obviously, the described embodiments are only some embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0027] The method for determining the axial uncoupling coefficient of the hole bottom cavity charge structure of the present invention affects the size of the hole wall pressure value and the length of the blasthole pressure action time to a large extent, and includes the following steps:

[0028] 1. Calculation of the peak pressure of the hole wall

[0029] After the explosive detonation of the air cushion section is completed, the initial pressure of the explosive gas when it expands is calculated according to the initial pressure of the explosive gas in the or...

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Abstract

The invention provides a method for determining an axial decoupling coefficient of a charge structure of a cavity in the bottom of a hole. The method is applied to the technical field of blasting engineering, and is designed comprehensively based on various factors such as failure characteristics of rock, the relation between initial tensile stress of rock of a hole wall and tensile strength of the rock and action time of quasi-static pressure of exploding gas in a blast hole. The method is used in the field of engineering blasting to overcome bottom resistance, eliminate a tight bottom and improve the circumstance that a method of ultra-deep reinforced charge at the bottom of the hole or adopting high explosive at the bottom when a blasting effect is achieved; and the method is used for digging protection layers of permanent buildings and structures.

Description

technical field [0001] The invention relates to the technical field of blasting engineering, in particular to a method for determining the axial uncoupling coefficient of a cavity bottom cavity charge structure. Background technique [0002] In the field of engineering blasting, in order to overcome the resistance of the bottom, eliminate the root, and improve the blasting effect, the method of super-deep reinforced charge at the bottom of the hole or the method of using strong explosives at the bottom is usually adopted. However, when excavating the protective layer of permanent buildings, hole It is not applicable to use ultra-deep reinforced charges at the bottom or strong explosives at the bottom. Therefore, it is urgent to determine a method for determining the axial uncoupling coefficient of the cavity bottom cavity charge structure, which is used for the excavation of the protective layer of permanent structures. . Contents of the invention [0003] Technical probl...

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Application Information

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IPC IPC(8): F42D3/04F42D1/08
CPCF42D1/08F42D3/04
Inventor 雷高崔晓林谢双阳高航张文锋钟小荣张帆柯希林
Owner 湖北三鑫金铜股份有限公司
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