A method for sealing blasting holes in coal mine roof

Abstract

The invention relates to the technical field of coal mining, in particular to a method for sealing blasting holes on the roof of a coal mine. The invention includes a blasting cylinder and an explosive. The explosive is provided on the left side of the blasting cylinder, and the explosive is fixedly connected with a detonating cord. The side fixed connection has a millisecond delay electric detonator, the right side of the millisecond delay electric detonator is fixedly connected with a blasting busbar, the right side of the blasting busbar is fixedly connected with a detonator, and the inner side of the blasting cylinder is fixedly connected with anti-slip barbs, and the anti-slip barb card and On the outside of the explosive, through grouting in the sealing section, it is directly bonded to the hole wall, and at the same time, the detonating cord and a water conduit are led out. The function of the water conduit is to facilitate the outflow of water in the blasting hole. For blasting, the blasting method enriches the pressure relief means, realizes the diversification of the sealing means without weakening the sealing effect, and reasonably responds to the pressure relief measures under different conditions. The second is to reduce the cost. Expenditure, in response to the mine's call to turn losses into profits.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to a method for sealing blasting holes in a coal mine roof. Background technique [0002] The impact of ground pressure in Gaojiapu Mine is obvious. The main roadway and mining face in the first panel area have a high impact risk. At this stage, roof blasting measures are mainly used to relieve pressure and relieve danger. The roof blasting work in Gaojiapu Mine is mainly concentrated in The main alley and the mining face in the first panel area are lined with grooves. The diameter of the blasting hole is 75mm, the depth is 50m, and the charge is 40kg. The length of the hole to be sealed is about 30m. Therefore, in view of the above problems, a method for sealing blasting holes in the roof of coal mines is proposed. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a method for sealing blasting holes in the roof of a coal mine, in order to s...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for sealing blast holes on the roof of a coal mine, to solve the problem that the traditional sealing method is to use a sealing agent to seal the hole, and the sealing agent is inserted into the sealing section in order, and the sealing section is filled. However, the sealing agent is not used to seal the holes tightly, which affects the blasting effect.

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