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An energy-gathering charge device and a roadway blasting forming method

A forming method and roadway technology, which are applied in the field of rock roadway blasting and excavation, can solve the problem that the blasting forming control of broken lines, curves, folded surfaces or curved surfaces cannot be well adapted, so as to reduce blasting damage, achieve accurate rock roadway blasting forming, The effect of improving the effect

Active Publication Date: 2022-03-29
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

like figure 1 As shown, in some traditional shaped charge device embodiments with multiple slits, such as at least two slits, the two slits are generally symmetrically arranged, and the line connecting the slit directions is 180°, which makes Not well suited for applications with broken line, curved, folded or surface blast forming control, such as contouring around arched or rectangular roadways

Method used

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  • An energy-gathering charge device and a roadway blasting forming method
  • An energy-gathering charge device and a roadway blasting forming method
  • An energy-gathering charge device and a roadway blasting forming method

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Embodiment 1

[0046] see figure 2 and image 3 , Figure 5 As shown, the variable-diameter energy-gathering charge device provided by the embodiment of the present invention is mainly used in blasting and excavation projects of rock roadways with curved or folded surfaces, such as straight wall semi-circular arch roadways and rectangular roadway excavation projects.

[0047] The shaped charge device includes a tube shell 1, a first slit 2 and a second slit 3 are spaced apart in the circumferential direction on the side wall of the tube shell 1, and the first slit 2 and the second slit The slot 3 is arranged asymmetrically with respect to the central axis of the tube case 1 .

[0048]The tube shell 1 is also called a slit tube because of the slits provided therein. In some embodiments, the material of the shell 1 is flame-retardant and antistatic rigid PVC pipe; the length of the shell 1 is 500 mm, the outer diameter is 40 mm, the inner diameter is 36 mm, and the wall thickness is 2 mm. ...

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Abstract

The embodiment of the invention discloses an energy-gathering charge device and a roadway blasting forming method, which relate to the technical field of rock roadway blasting and excavation. The energy-shaping charge device includes a tube shell, and a first slit and a second slit are spaced apart in the circumferential direction on the side wall of the tube shell, and the first slit and the second slit are opposite to the central axis of the tube shell Symmetrically arranged, and the line between the first slit, the central axis of the shell and the second slit is consistent with the top profile of the roadway, or, the first slit, the central axis of the shell and the second slit The first included angle formed by the connection line between them is consistent with the top angle of the roadway. It is beneficial to improve the blasting forming effect of the surrounding contour of the roadway. The invention is suitable for blasting excavation projects of rock roadways with curved or folded surfaces, such as straight wall semi-circular arch roadways and rectangular roadway excavation projects.

Description

technical field [0001] The invention relates to the technical field of rock roadway blasting and excavation, in particular to an energy-gathering charge device and a roadway blasting forming method. Background technique [0002] In rock roadway excavation, blasting technology has been widely used. When the drilling and blasting method is used for construction, the traditional blasting method will inevitably cause over-excavation and under-excavation of the roadway section, which will affect the formation of the roadway. In severe cases, it will increase the density of surrounding rock. damage, and even adversely affect the stability of the roadway. [0003] In order to improve the surrounding formation of rock roadway blasting and control the blasting damage of surrounding rock mass, directional fracture blasting technology has become a key issue in the research of rock roadway blasting. The wide application of this technology has also produced good economic and social benef...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F42B3/04F42D1/00F42D1/08F42D3/04E21D9/00
CPCF42B3/04F42D1/00F42D1/08F42D3/04E21D9/006
Inventor 杨仁树肖成龙丁晨曦史国利康一强赵志伟
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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