Directional rock blasting crack propagation method and device

A technology of rock blasting and expansion method, which is applied in the field of directional fracture blasting and directional expansion of rock blasting cracks, which can solve problems such as unsatisfactory use effects, achieve significant technical and economic effects, reduce the number of blast holes, and reduce damage.

Inactive Publication Date: 2011-06-29
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The two methods are different, but the effect is not ideal. With the needs of human beings to develop and transform nature, designing a new directional expansion fracture blasting method has become the main purpose of the present invention

Method used

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  • Directional rock blasting crack propagation method and device
  • Directional rock blasting crack propagation method and device
  • Directional rock blasting crack propagation method and device

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Embodiment Construction

[0029] It can be seen from the above technical scheme that the method for directional expansion of cracks in rock blasting according to the present invention is to use the energy-shaping charge coil to release the energy of the explosive preferentially along the direction of the slit, and perform orientation on the roadway (tunnel) contour line and side slope. Fracture control blasting, so as to obtain a precisely controlled blasting fracture surface, limit the number of cracks and crack extension lengths in other directions such as surrounding rocks and slopes that need to be protected, so as to improve production efficiency, reduce production costs, and improve construction progress.

[0030] The present invention will be further described below in conjunction with accompanying drawing:

[0031] Such as figure 1 , figure 2 , image 3 As shown, a device for directional expansion of cracks in rock blasting, that is, a shaped charge roll, includes a slotted tube 5 and explos...

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Abstract

The invention discloses a directional rock blasting crack propagation method and a directional rock blasting crack propagation device. The directional rock blasting crack propagation device consists of kerf pipes and explosive, wherein each kerf pipe is symmetrically provided with double kerfs along the longitudinal wall. During directional blasting of peripheral blast holes of a roadway or presplit blasting of an open pit slope, the kerf pipes and the explosive are filled in the blast holes to finish directional crack blasting, wherein an included angle of the kerf direction and the presplit blasting outline direction is less than 150 degrees. The energy of the explosive is preferably released along the kerf direction in a centralized way, so that a blasting fracture surface is accurately controlled, the number of blasting cracks in other directions such as a surrounding rock, a slope and the like is greatly reduced, the length for the blasting crack propagation in the direction to be protected is limited, the production efficiency is high, and the construction cost is low; the device has a simple overall structure and is convenient to use, and is particularly suitable for directional controlled blasting of a rock gangway, a tunnel and the slope.

Description

technical field [0001] The invention relates to a directional fracture blasting method, in particular to a method and device for directional expansion of cracks in rock blasting by using energy-gathering charges, and belongs to the field of engineering blasting construction. technical background [0002] At present, technical methods such as smooth blasting and pre-splitting blasting are widely used in the blasting construction of roadways (tunnels) and slopes at home and abroad. Due to the limitations of their own structural principles, most blasting has over-excavation, under-excavation, and uneven surroundings. and severe slope damage. The directional fracture blasting methods used at home and abroad are roughly divided into two types: (1) using a slotting drill bit to cut a groove of a certain depth on the axis of the blasthole wall according to the rock cracking direction, and blasting after forming the slotted blasthole ; (2) Change the charge structure to realize the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D3/04F42D1/00
Inventor 杨仁树李清杨永琦
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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