Hole sealing method for deep hole advanced loose blasting

Abstract

The invention discloses a hole sealing method for deep hole advanced loose blasting, comprising steps: putting an explosive roll and a packer into a drill hole to enable the packer to be blocked at the right end of the explosive roll; putting a left end of a detonating cord to pass through a hollow pipe from the right end of the drill hole to the left end of the drill hole to enable the left end of the detonating cord to be contacted with the explosive roll sufficiently; connecting the packer; promoting the packer and a first high pressure water pipe toward left by the cylinder connection rod to enable the packer and the first high pressure water pipe to move toward left in the drill hole and the packer to reach to the appropriate position of the drill hole; after the packer reached to the appropriate position of the drill hole, connecting the first high pressure water pipe and a manual pump; sealing the hole, at last, the deep hole advanced loose blasting is implemented. According to the method of the invention, the drill hole can be sealed, the hole sealing speed is fast, the hole sealing effect is good, and the safety performance is high.

Description

technical field [0001] The invention relates to a hole sealing method for deep hole advance loosening blasting, and belongs to the technical field of coal mine safety construction. Background technique [0002] Rockburst and its induced coal and gas explosion accidents have increasingly become the main factors restricting the safe and efficient production of coal mines. Controlling the occurrence of rock burst disasters is essentially to change the stress state of the coal-rock mass or avoid high stress, so as to ensure that the coal-rock mass is not enough to cause unstable or unstable damage. Therefore, the main way to prevent rock burst is to expand the range of stress release by various means to reduce the degree of stress concentration and the speed of stress release. Blasting for deep hole advance loosening is the best measure to relieve danger in high stress area of ​​working face. In the prior art, the hole sealing method used for deep hole advance loosening blasti...

AI Technical Summary

Problems solved by technology

In the prior art, the hole sealing method used for deep hole advance loosening blasting generally uses yellow mud to seal the hole. After putting the medicine roll into the drill hole, the yellow mud is used to fill the hole with wooden gun sticks. The yellow mud needs to be sealed. It is dense and cannot damage the detonating cord at the same time. This method is relatively primitive, and the entire process is very cumbersome, especially the sealing of yellow mud, which will take up a lot of working time. Guaranteed sealing effect

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