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Sublevel interval charging explosion flame-proof in confined space and delayed detonation device and method

A segmented interval and confined space technology, applied in blasting, blasting barrels, weapon accessories, etc., can solve the problems of long operation time, high consumption of explosives, large number of drilling holes, etc., and achieve the effect of reducing the minimum resistance line and improving the blasting effect

Active Publication Date: 2019-09-20
ARMY ENG UNIV OF PLA
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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 explosion flame-proof in confined space and delayed detonation device and method
  • Sublevel interval charging explosion flame-proof in confined space and delayed detonation device and method
  • Sublevel interval charging explosion flame-proof in confined space and delayed detonation device and method

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Embodiment Construction

[0035] 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.

[0036] 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 explosion flame-proof and delayed detonation device in a confined space and a method. The 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; a plurality of cascaded annular metal expansion tubes are arranged at the outer part of the lower connecting terminal. According to the device and the method disclosed by the invention, upper charging detonation is converted into initiation power for lower charging; through long delay and then detonation for lower charging, as well as 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, and secondary blasting of rock blasting is realized, and thereby a V-shaped pit meeting size parameter requirements is formed by primary explosion.

Description

technical field [0001] The invention belongs to the technical field of blasting, and relates to an explosion-proof and time-delayed explosion-transfer device and method for segmented and interval-charged explosion in a confined space, which realizes the one-time forming of special V-shaped pits on hard rocks. 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D3/04F42B3/10F42B3/00
CPCF42D3/04F42B3/10F42B3/00Y02E60/10
Inventor 钟明寿谢兴博郭涛范磊殷勤赵杰
Owner ARMY ENG UNIV OF PLA
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