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Method for peripheral hole non-coupling continuous loading

A charge and peripheral technology, applied in blasting and other directions, can solve the problems of uneven distribution of explosives, damage, inability to form a smooth and flat contour surface, etc., to achieve better blasting effect, smooth contour surface, and save detonating cords. Effect

Inactive Publication Date: 2014-05-14
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it is an uncoupled charge, the explosives are not uniformly distributed in the longitudinal direction of the blast hole, and the energy in the local position is relatively concentrated, which will cause the surrounding rock of the hole wall at the corresponding position to be strongly impacted, and the damage is serious, making it impossible to form a smooth and flat surface. Contour surface

Method used

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  • Method for peripheral hole non-coupling continuous loading
  • Method for peripheral hole non-coupling continuous loading
  • Method for peripheral hole non-coupling continuous loading

Examples

Experimental program
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Effect test

Embodiment 1

[0035] In the smooth blasting of tunnel excavation, the diameter of the surrounding hole is 42mm, the depth of the blasthole is 3.5m, the diameter of the emulsion explosive roll used on site is 35mm, the length of the roll is 20cm, and the mass of the roll is 180g; the surrounding rock is a relatively complete metamorphic rock, and the firmness coefficient Up to 12-16, the charge density of the peripheral hole line determined in the blasting design is 350g / m, and the charge length of the peripheral hole is 3.2m.

[0036] Attached figure 1 Determine the position of the incision of the drug roll according to the form, after calculation: the cross-sectional area required for the peripheral hole drug package is 3.7cm 2 , the total cross-sectional area of ​​the original drug volume is 9.6cm 2 , determine the incision position according to the ratio, and cut the medicine roll. Choose a PVC pipe with an outer diameter of 30mm, cut it to a length of 3.2m, divide the PVC pipe mouth i...

Embodiment 2

[0039] In the smooth blasting of tunnel excavation, the diameter of the surrounding hole is 42mm, the depth of the blasthole is 3.5m, the diameter of the emulsion explosive roll used on site is 35mm, the length of the roll is 20cm, and the mass of the roll is 180g; the surrounding rock is a relatively complete metamorphic rock, and the firmness coefficient Up to 12-16, the charge density of the peripheral hole line determined in the blasting design is 350g / m, and the charge length of the peripheral hole is 3.2m.

[0040] Attached figure 1 Determine the position of the incision of the drug roll according to the form, after calculation: the cross-sectional area required for the peripheral hole drug package is 3.7cm 2 , the total cross-sectional area of ​​the original drug volume is 9.6cm 2 , determine the incision position according to the ratio, and cut the medicine roll. Choose a PVC pipe with an outer diameter of 30mm, cut it to a length of 3.2m, divide the PVC pipe mouth i...

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Abstract

The invention relates to a method for peripheral hole non-coupling continuous loading. According to the method, under the condition that spaced loading and detonation of a detonating cord are not adopted, the feature that emulsion explosives can be conveniently shaped is made use of and non-coupling continuous loading is achieved in the axial direction of a blast hole by regulating the loading diameter through a PVC pipe and in strict accordance with the designed peripheral hole cord loading density. Reversed detonation of a hole bottom blasting cap is used for achieving the aim of smooth detonation. Compared with a traditional method, non-coupling continuous loading is carried out on a peripheral hole, so that explosive energy in the hole can be distributed more evenly. Local damage to the wall of the hole by a cartridge bag is controlled and the smoothing effect is more obvious. Meanwhile, due to the fact that reversed detonation of a hole bottom is adopted, a detonating cord does not need to be arranged on the peripheral hole, the cost of smooth detonation is greatly reduced. In addition, the PVC pipe has good flexibility, the PVC pipe serves as an auxiliary material to make a loading body, and the method is suitable for blast hole loading of different depths and easy and convenient to operate.

Description

technical field [0001] The invention relates to the technical field of controlled blasting, in particular to a method for continuously charging explosives without coupling peripheral holes to control blasting hazards and ensure the flatness of contour surfaces. Background technique [0002] Under the action of explosive energy, the surrounding rock will be damaged to varying degrees, which will inevitably affect the stability or integrity of adjacent structures. Peripheral hole control blasting technology is a scientific construction method to ensure the flatness of the contour surface and maintain the stability of the surrounding rock, especially in blasting constructions that require high peripheral contours such as tunnels, subways, quarries, and water conservancy and hydropower. The more obvious effect can form a regular, smooth contour surface that meets the design requirements on the basis of controlling the blasting hazard. [0003] The charge structure is the key to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D1/08
Inventor 段宝福宋乐春杨帆时洪举郝兆青
Owner SHANDONG UNIV OF SCI & TECH
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