Multi-direction collision energy-gathering multi-point initiation method for reducing the foundation of deep hole bench blasting

A technology of step blasting and multi-point initiation, which is applied in the field of blasting, can solve problems such as high occurrence rate of step blasting roots, increase equipment wear and failure, and affect normal production, so as to be suitable for large-scale promotion and use, reduce dust, Improves the effect of blasting effects

Active Publication Date: 2018-09-07
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual deep hole bench blasting, as the depth of the blast hole increases, the clamping effect on the rock at the bottom of the hole becomes greater and greater, resulting in poor blasting effect and a high incidence of step blasting at the bottom, resulting in root cleaning and secondary blasting. The amount of blasting work is large, which not only increases the construction cost, but also increases the possibility of equipment wear and failure, which is not conducive to the safety of personnel and equipment, and affects the normal production

Method used

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  • Multi-direction collision energy-gathering multi-point initiation method for reducing the foundation of deep hole bench blasting
  • Multi-direction collision energy-gathering multi-point initiation method for reducing the foundation of deep hole bench blasting
  • Multi-direction collision energy-gathering multi-point initiation method for reducing the foundation of deep hole bench blasting

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Aggregate mining project of a hydropower station needs to reduce the blasting foundation in the deep hole step blasting. The blasting design is: vertical drilling, the drilling depth is 10m, the bottom of the hole is over-excavated, the over-excavation depth is 1m, and the drilling diameter is 76mm. The hole spacing is 2.0-2.5m, and the middle detonation method is adopted. like Figure 1~3 As shown in (a), the specific implementation steps of blasting by adopting the multi-directional collision energy-gathering multi-point detonation method that reduces the blasting root in the present embodiment one are as follows:

[0029] S1. Drilling steps:

[0030] Firstly, manually or mechanically remove the overburden layer on the surface of the rock foundation to level the site;

[0031] Then blow the surface with a high-pressure air pipe, and blast the blast hole 1 ( figure 1 Only 3 blastholes are shown in the picture 1) Stake out hole by hole, and the points are marked with...

Embodiment 2

[0047] The aggregate mining project of a hydropower station needs to reduce the blasting foundation in the deep hole step blasting. The blasting design is: vertical drilling, the drilling depth is 10m, the super depth is 1m, the drilling diameter is 90mm, and the hole spacing is 2.0-2.5m , using an intermediate detonation method. like figure 1 , 2 Shown in and 3 (b), in the present embodiment two, adopt the multi-directional collision energy-gathering multi-point detonation method that reduces blasting foundation to carry out the specific implementation steps of blasting as follows:

[0048] S1. Drilling steps:

[0049] Firstly, manually or mechanically remove the overburden layer on the surface of the rock foundation to level the site;

[0050] Then blow the surface with a high-pressure air pipe, and blast the blast hole 1 ( figure 1 Only 3 blastholes are shown in the picture 1) Stake out hole by hole, and the points are marked with red paint;

[0051] Then, in the blast...

Embodiment 3

[0062] The aggregate mining project of a hydropower station needs to reduce the blasting foundation in the deep hole step blasting. The blasting design is: vertical drilling, the drilling depth is 10m, the super depth is 1m, the drilling diameter is 105mm, and the hole spacing is 2.0-2.5m , using an intermediate detonation method. like figure 1 , 2 Shown in and 3 (c), in the present embodiment three, adopt the multi-directional collision energy-gathering multi-point detonation method that reduces blasting foundation to carry out the specific implementation steps of blasting as follows:

[0063] S1. Drilling steps:

[0064] Firstly, manually or mechanically remove the overburden layer on the surface of the rock foundation to level the site;

[0065] Then blow the surface with a high-pressure air pipe, and blast the blast hole 1 ( figure 1 Only 3 blastholes are shown in the picture 1) Stake out hole by hole, and the points are marked with red paint;

[0066] Then, in the bl...

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Abstract

The invention provides a multidirectional colliding energy gathering and multi-point initiation method capable of effectively reducing deep-hole bench blasting toes and improving the blasting effect. The multidirectional colliding energy gathering and multi-point initiation method capable of reducing the deep-hole bench blasting toes is characterized by comprising a charging step, arranging a water bag at the bottom of a bench blasting hole and carrying out continuous charging at the upper part of the water bag; a detonating fuse arrangement step, arranging a plurality of detonating fuses at two sides of a cartridge located at the middle and lower part of the blasting hole, connecting the detonating fuses to a blasting cap and blocking the hole by using a tamping plug; and an initiation step, detonating powder in the blasting hole through the blasting cap.

Description

technical field [0001] The invention belongs to the field of blasting methods, and in particular relates to a multi-directional collision energy-gathering multi-point initiation method capable of reducing the foundation of deep-hole step blasting. Background technique [0002] Deep hole step blasting generally refers to drilling and blasting on the stripping steps of open-pit mines or on pre-leveled land. The hole diameter is greater than 50mm, the hole depth is greater than 5m, and an extended charge is placed in the hole. Blasting operation method. With the continuous appearance of large and medium-sized drilling machines, open-pit bench deep-hole blasting has become more and more widely used, and has become the main method for aggregate mining in hydropower stations and open-pit excavation in mines. However, in actual deep hole step blasting, as the depth of the blast hole increases, the clamping effect on the rock at the bottom of the hole becomes greater and greater, r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F42D1/08F42D3/04
CPCF42D1/08F42D3/04
Inventor 严鹏董凯卢文波陈明王高辉
Owner WUHAN UNIV
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