Underground coal mine deep-hole directional blasting cartridge

A technology of directional blasting and deep hole, which is applied in the direction of blasting tubes, blasting, weapon accessories, etc. It can solve the problem that the tube is easily blocked by scattered coal or rock blocks, and achieve the effect of reducing the probability of blast rejection

Active Publication Date: 2014-04-30
TIANDI SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In order to achieve a more ideal directional blasting effect in the energy-gathering groove, and to solve the technical problem of being easily separated by scattered coal or rock block

Method used

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  • Underground coal mine deep-hole directional blasting cartridge
  • Underground coal mine deep-hole directional blasting cartridge
  • Underground coal mine deep-hole directional blasting cartridge

Examples

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Example Embodiment

[0040] In order to make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0041] Such as figure 1 with 2 Shown is a preferred embodiment of the quilt for deep hole directional blasting in underground coal mines of the present invention.

[0042] The deep hole directional blasting quilt in the coal mine includes a quilt body 1, an upper connector 2 and a lower connector 3. The quilt body 1 has an incision 4 on one side, and the incision 4 is covered with a sheet of metal 5 The metal sheet 5 is recessed inward to form a “V”-shaped groove, and the bottom of the “V”-shaped groove points radially to the center of the circle along the circumference of the barrel body 1 and is located at a 1 / 2 radius.

[0043] In this embodiment, the bottom angle of the "V" groove is 60°-90°, preferably 75°.

[0044] In this embodiment, the mat...

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Abstract

An underground coal mine deep-hole directional blasting cartridge comprises a cartridge body (1), an upper connector (2) and a lower connector (3). One side or opposing sides of the cartridge body (1) are provided with cuts (4), and each cut is covered with a layer of metal sheet (5) which is provided with a V-groove by concaving; the bottom of every V-groove points to the center of circle along the peripheral radial direction of the cartridge body and is arranged at a 1/2 radius part. The underground coal mine deep-hole directional blasting cartridge allows for more ideal directional blasting.

Description

technical field [0001] The invention relates to a blasting quilt, in particular to an underground deep hole directional blasting quilt in a coal mine. Background technique [0002] In the process of coal mining, it is required that the overlying strata of the coal seam collapse with the mining of the coal seam, that is, the roof can be raised at the same time as the mining. Generally, the initial collapse distance, that is, the initial pressure step distance, should not exceed 30m, and the secondary collapse should not exceed 30m. The distance, that is, the periodic pressure step distance, generally should not exceed 10m. However, due to the complex formation process of the overlying strata over the coal seam, the strata structures in different regions vary widely. In some areas, the thickness of the hard roof of the overlying strata on the coal seam can reach 10-30m, and the f-value coefficient of the rock stratum is more than 10. Up to 60m or more. The greater the suspe...

Claims

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Application Information

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IPC IPC(8): F42D1/00F42B3/00
Inventor 李春睿
Owner TIANDI SCI & TECH CO LTD
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