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Annular slit non-shaped-charge-cover type air gap energy concentration blast charging method based on detonation wave waveform modulation

A technology of detonation wave and powder cover, which is used in blasting and other directions

Inactive Publication Date: 2019-09-17
CHINA RAILWAY 18TH BUREAU GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Ordinary PVC pipes can be considered for non-electric initiation system

Method used

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  • Annular slit non-shaped-charge-cover type air gap energy concentration blast charging method based on detonation wave waveform modulation
  • Annular slit non-shaped-charge-cover type air gap energy concentration blast charging method based on detonation wave waveform modulation
  • Annular slit non-shaped-charge-cover type air gap energy concentration blast charging method based on detonation wave waveform modulation

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Experimental program
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Embodiment Construction

[0019] exist figure 1 Among them, the circumferential slit section PVC pipe (1) determines its different circumferential slit (2) spacing and circumferential slit section length depending on the surrounding rock level, explosive specification and type, etc. Circumferential slits (2) leave inter-slit connecting arcs (3) during manual slits or batch molding, and the number and arc length depend on the material, wall thickness and circumferential slit width of the selected PVC pipe, etc. parameters to ensure the necessary rigidity and strength when the circumferential slit tube is charged. In order to ensure the subsequent normal charging of the cut hole, the PVC pipe leaves a 100-200mm non-slit segment (4) for transition.

[0020] exist figure 2 In the schematic diagram of the circular slit air-gap energy-concentrating detonation wave modulation shown in the schematic diagram, the circular slit pipe (1) is back-sealed with strong adhesive tape at one end and then filled with ...

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Abstract

The invention discloses an annular slit non-shaped-charge-cover type air gap energy concentration blast charging method based on detonation wave waveform modulation. In order to overcome the limitation that a conventional annular energy concentration device needs to be provided with a shaped charge cover and can only be used for special blasting, on the basis of the annular slit detonation wave waveform modulation technology, during common industrial explosive column charge detonation, an annular slit air gap energy concentration mechanism with the unlimited ring number is constructed, column waves different from waves formed by conventional columns charging detonation are generated, multi-stage annular detonation wave air gap energy concentration jet flow is formed along the charge axis, complex impact wave waveforms are generated in rock soil, the impact wave pressure and pulling(shearing) effect is remarkably enhanced so as to enhance the explosive detonation local damage capability, the charge annular explosive energy concentration degree and the adjacent blast hole charge explosive impact wave mutual effect are improved, and the purposes of improving the rock soil breaking effect and increasing the explosive energy utilization rate (or the blast hole utilization rate) are achieved.

Description

technical field [0001] The invention relates to a charge method for air-gap energy-gathering blasting of a circular slit drug-free cover based on detonation wave waveform modulation, which belongs to the technical field of engineering blasting and is suitable for mining, geotechnical engineering, water conservancy and hydropower, and traffic engineering It is especially suitable for improving the blasting efficiency of shaft excavation and tunnel excavation and cutting and reducing the foundation of open-air step blasting, and has a wide application prospect. Background technique [0002] CN200310120891.6 patent discloses a medium-deep hole blasting energy-gathering flat-bottom bomb and its use method, which is characterized in that 4 to 8 energy-gathering grooves or holes with or without a cover are arranged in the circumferential direction of the cylindrical charge, And seal its energy-gathering groove or energy-gathering hole. The flat-bottomed bomb needs to be specially...

Claims

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Application Information

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IPC IPC(8): F42D3/04F42D1/08
CPCF42D1/08F42D3/04
Inventor 周凯赵新琛张庆彬
Owner CHINA RAILWAY 18TH BUREAU GRP CO LTD
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