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Rock drilling and explosion method for mining

An empty hole and charging technology, which is applied in the direction of earthwork drilling, cutting machinery, etc., can solve the problems of large charging volume, low efficiency and difficulty in blasting holes, and achieve the effect of high safety factor and low dosage.

Inactive Publication Date: 2014-04-23
JINCHUAN GROUP LIMITED
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AI Technical Summary

Problems solved by technology

[0004] The disadvantage of this method of rock drilling and blasting caving is that the cutting is wedge-shaped, and the footage is 60-70 cm, which is difficult to reach more than 1.5 meters; Poor, the amount of ore collapsed is small, and the efficiency is very low

Method used

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  • Rock drilling and explosion method for mining
  • Rock drilling and explosion method for mining
  • Rock drilling and explosion method for mining

Examples

Experimental program
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Embodiment

[0020] 1. Double cut hole ( image 3 )

[0021] For cutting holes in harder rock. The auxiliary density is increased, and the amount of charge is increased. The footage can be between 2.0 and 2.5 meters with this method of cutting. Requirements for internal cut holes: hole depth 1.2-1.5 meters, hole distance 1.2 meters; external cut hole requirements: hole depth 2.5-2.8 meters, hole distance 1.6 meters.

[0022] 2. Right cut ( Figure 4 )

[0023] For working surfaces. The rocks on the left are shallow, the right is deep, and the rocks on the left are hard, while the rocks on the right are soft and have broken zones and slippery rocks, which help to increase the footage of a single shot.

[0024] 3. Left cut ( Figure 5 )

[0025] For working surfaces. The rocks on the left are deep, the right is shallow, and the rocks on the left are soft, while the rocks on the right are hard and the rocks on the left have broken zones and rocks with free sliding surfaces, which hel...

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Abstract

The invention discloses a rock drilling and exposition method for mining, and relates to a rock drilling and explosive falling method during the mining process. The method is characterized in that: a hollow hole is arranged in a cutting center during the cutting process, the hollow hole is created by a big drill bit, the hollow hole is not loaded with explosive; 6 to 8 small hollow holes are arranged around the hollow hole, each small hollow hole is filled with explosive, after the explosion, a deep cutting is formed; two flank holes are not filled with explosive and are hollow holes too; the amount of the explosive in the auxiliary hole can bring down the rocks in the periphery, and after the explosion, the two side are neat and smooth. The method has the advantages that: cutting is deep and neat, the overall using amount of explosive is less, the falling ores are more, and the safety coefficient is higher.

Description

technical field [0001] The invention relates to a rock drilling and blasting method for mining, and relates to a rock drilling and blasting caving method used in the mining process of a mine. technical background [0002] During rock drilling and blasting in the mining process, the level of rock drilling and the quality of eye holes directly affect work efficiency, engineering quality, and safety conditions. It is of great significance to continuously improve the technical level of rock drilling to improve work efficiency, improve project quality, ensure the safety of the working environment and reduce production costs. [0003] The traditional rock-drilling and blasting caving method is to drill 6-8 core holes in the center of the working face, place explosives and blast, and blast a part of the rock and throw it out to form a groove-shaped cavity—cutting, creating the first hole for auxiliary hole blasting. Two free surfaces create good conditions for blasting other blast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C27/02
Inventor 殷双英周维亮吴忠华张喜盈闫跟东刘世和
Owner JINCHUAN GROUP LIMITED
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