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Double-cartridge blasting method and accurate positioning device as well as positioning method for charging

A technology of precise positioning and charge roll, which is applied in the direction of blasting, etc., can solve the problems of affecting the seam forming effect and broken situation, and the trouble of fixing the position of the charge roll, so as to achieve good blasting seam forming effect, good seam forming effect and avoid asymmetry Effect

Active Publication Date: 2019-06-07
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, it is troublesome to fix the position of the drug roll, which directly affects the seam forming effect and broken state after blasting

Method used

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  • Double-cartridge blasting method and accurate positioning device as well as positioning method for charging
  • Double-cartridge blasting method and accurate positioning device as well as positioning method for charging
  • Double-cartridge blasting method and accurate positioning device as well as positioning method for charging

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0058] Step 1: Select a charge device with a blast hole diameter of 100mm, and a cartridge diameter of 25mm.

[0059] Step 2: Place two L-shaped guide plates 30 in the blasthole along the line A connecting the blastholes.

[0060] Step 3: Bind the bottom 4 medicine rolls on the bamboo strips with an interval of 300mm. Repeat the binding of the 4 medicine rolls, and the bottom 2m of the medicine is the same.

[0061] Step 4: The middle section is charged according to the line charging density of 600g / m, and double drug rolls are used for charging. According to the design requirements, the center distance of the drug rolls is 37mm. The bamboo strip is selected to be 3000mm×50mm×6mm to determine the position of the charge roll in the blast hole, and the wooden block with a size of 100mm×50mm×6mm is selected, and the detonation index is used to detonate. The blasting cord is tied together.

[0062] Step 4: Adjust the position of the snap ring 24 at the same time to ensure that t...

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Abstract

The invention provides a double-cartridge blasting method and an accurate positioning device as well as positioning method for charging. Through the double-cartridge blasting method and the accurate positioning device as well as positioning method, the asymmetric damage effect can be avoided, the damage to surrounding rock can be effectively reduced, and the construction efficiency can be improved. The double-cartridge blasting method comprises the following steps: step 1, blasting parameters are determined according to a single-cartridge blasting design method; step 2, the total charging quantity of each double-cartridge group is determined according to the double-cartridge charging quantity and corresponding double cartridges are selected; step 3, the cartridge center distance is determined, that is, the center distance between two cartridges in each double-cartridge group is set to be 1 to 2 times of the cartridge diameter; step 4, for each blasting hole, each double-cartridge groupis mounted by adopting the accurate positioning device for charging according to the diameter of the blasting hole and the cartridge center distance, the preset center distance between the two cartridges in each double-cartridge group is kept, and the two cartridges in each double-cartridge group are symmetrically arranged; and step 5, the mounting operation in step 4 is continuously performed according to the blasting parameters, the double cartridges are mounted in each blasting hole, and a trigger is arranged.

Description

technical field [0001] The invention belongs to the field of pre-splitting blasting engineering, and in particular relates to a double-powder coil blasting method, a charge precise positioning device and a positioning method. technical background [0002] As a widely used blasting technology, pre-splitting blasting has the advantages of reducing over- and under-excavation, forming smooth and flat walls, and reducing rock damage in reserved areas. Therefore, it plays an important role in engineering blasting projects. [0003] The pre-splitting blasting technology adopts a cylindrical uncoupled charge structure, the blast energy is evenly distributed along the radial direction of the blast hole, the explosion cracks diverge along the blast hole, and the surrounding rock around the blast hole is greatly damaged. At the same time, the distance between the pre-splitting blasting blastholes is small, the drilling workload is heavy, and the cost is high, which affects the construc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D3/04F42D1/22F42D1/08
Inventor 王明洋徐坤李新平李毅阳宋凯文王刚汪洋
Owner WUHAN UNIV OF TECH
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