Sublevel interval charging detonation flame-proof tube in confined space and flame-proof method

A segmented interval and confined space technology, applied in the field of blasting, can solve the problems of high consumption of explosives, difficulty in meeting the requirements of rapid prototyping in military applications, and long working time, so as to achieve the effect of improving the blasting effect

Active Publication Date: 2019-09-20
ARMY ENG UNIV OF PLA
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this method is that the number of drilling holes is large, the operation time is long, and the consumption of explosives is also high, so it is difficult to meet the needs of rapid prototyping in military applications.

Method used

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  • Sublevel interval charging detonation flame-proof tube in confined space and flame-proof method
  • Sublevel interval charging detonation flame-proof tube in confined space and flame-proof method
  • Sublevel interval charging detonation flame-proof tube in confined space and flame-proof method

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Embodiment Construction

[0034] The purpose of the present invention is to form a special-sized V-shaped pit on a hard rock by one-time blasting, improve the efficiency of pit body forming, and avoid the operational risk caused by the blasting construction of secondary filling explosives. The adopted scheme is in A blasting device with two-stage explosives installed after drilling a hole in the rock, and controlling the delay between the upper explosive and the lower explosive, so that the upper charge creates an air surface for the lower charge, reducing the blasting time of the two charges The minimum resistance line realizes rapid prototyping of the pit body in one blast with less charge.

[0035] Such as image 3 As shown, the main technical route of the present invention is as follows: first, a hand-held drill is used to drill a vertical blast hole 92 in the rock 96, and then the blasting device 93 of the present invention, which integrates the upper and lower charges and the delay transmission u...

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Abstract

The invention discloses a sublevel interval charging detonation flame-proof tube in a confined space and a flame-proof method. A detonation device comprises an upper connecting terminal and a lower connecting terminal which are movably connected through threads; a first cushion pad is arranged between an upper explosive tube and a flange structure and is of a hollow structure; a second flexible detonating fuse is arranged inside a central through hole of the first cushion pad; a plurality of cascaded annular metal expansion tubes are arranged at the outer part of the lower connecting terminal; a second cushion pad is arranged between a lower grain and a flange. According to the detonation device and the flame-proof method disclosed by the invention, upper charging detonation is converted into initiation power for lower charging; by use of comprehensive flame-proof action, the condition that a lower cartridge case is impacted and damaged as well as sympathatically detonates after an upper grain explodes is prevented.

Description

technical field [0001] The invention belongs to the technical field of blasting, and relates to a detonation explosion-proof tube and a method for detonation-proof explosion-proof tubes charged with subsections and intervals in a confined space. Background technique [0002] In the fields of mining, construction and military applications, it is usually necessary to excavate special pits with V-shaped cross-sections on hard rocks, such as figure 1 As shown, the V-shaped pit is a V-shaped pit that is wide at the top and narrow at the bottom, the mouth d of the pit body is smaller than the depth h, and has a certain inclination angle requirement. It is commonly known as a variant funnel, and blasting is usually used for excavation. figure 2 The formation method of conventional layered blasting of V-shaped pits is given. First, several cutting holes are drilled in the upper layer of the rock, including the central hole and the edge hole. The position of the cutting holes is arr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D1/08F42D3/04
CPCF42D1/08F42D3/04
Inventor 谢兴博钟明寿纪冲刘影李兴华杨贵丽马华原
Owner ARMY ENG UNIV OF PLA
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