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Asymmetric blasting method for dismantling milling coal hole sleeve

A coal-slipping and asymmetric technology is applied in the field of asymmetric blasting for removing coal-slipping sleeves, and achieves the effects of saving manpower, improving work efficiency, and having obvious safety effects.

Inactive Publication Date: 2019-07-12
HUAIBEI MINING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an asymmetric blasting method for removing the coal chute sleeve, which can effectively solve the problems caused by the conventional blasting method and the iron skeleton support method, and the method is simple and the effect is ideal

Method used

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  • Asymmetric blasting method for dismantling milling coal hole sleeve
  • Asymmetric blasting method for dismantling milling coal hole sleeve
  • Asymmetric blasting method for dismantling milling coal hole sleeve

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Embodiment

[0026] An asymmetric blasting method for removing a coal chute sleeve, comprising the following steps:

[0027] (1) Three layers of blasting rings are arranged in sequence along the outer circumference of the coal hole sleeve, which are the first layer of blasting rings, the second layer of blasting rings and the third layer of blasting rings, and the first layer of blasting rings is equidistant counterclockwise The blastholes numbered 1-12 are arranged in order, the blastholes numbered 13-32 are arranged in an equidistant counterclockwise order on the second layer of blasthole ring, and the numbers 33-80 are arranged in an equidistant counterclockwise order on the third layer of blasthole ring Among them, the blastholes No. 1-32 are auxiliary blastholes, and the blastholes No. 33-80 are peripheral holes; the depth of the blasthole is required not to be lower than the joint of two adjacent sleeves, and the depth of the blasthole is too shallow or too deep It will cause the col...

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Abstract

The invention discloses an asymmetric blasting method for dismantling a milling coal hole sleeve. The asymmetric blasting method for dismantling the milling coal hole sleeve comprises the steps of sequentially arranging multiple layers of shot hole rings along the outer circumference direction of the milling coal hole sleeve, equidistantly arranging multiple shot holes on each layer of shot hole ring, sequentially loading detonators and explosives in the shot holes in one sides of the multiple layers of shot hole rings from inside to outside, then sequentially loading detonators and explosivesin the shot holes in the other sides of the multiple layers of shot hole rings from inside to outside, and finally sequentially blasting the shot holes according to different initiation sequences; and prolonging initiation time by different sections of the detonators, successively applying different impact forces on the left side and the right side of the sleeve, and damaging, deforming and collapsing the sleeve, wherein the collapsed sleeve stretches over a next sleeve, so that gangue holes cannot be blocked, and gangue removing and natural ventilating are facilitated. According to the method, not only is the accident potential of hole blockage is eliminated, but also full air pressure ventilation in the holes is realized, so that an employee working environment is remarkably improved, and a safety effect is remarkable; and meanwhile, the work efficiency is improved twice, a large number of manpower is saved, and the economic benefit is remarkable.

Description

technical field [0001] The invention belongs to the field of coal mining, and more specifically, the invention relates to an asymmetric blasting method for removing a sleeve of a coal slip hole. Background technique [0002] In coal mining, in view of the current situation that the coal (gangue) hole in the section working face is only used for one mining roadway, the storage capacity requirement is low, and the service life is short, the raising drilling rig method is generally used for construction. On the basis of raising the hole in the raised shaft, set the steel well ring in time, and pour concrete support between the well ring and the warehouse body to ensure that the coal (gang) hole will not be damaged by soft rock and structural belts, and improve The support strength of the warehouse body has the advantages of low labor intensity, good quality of well completion, high speed, high work efficiency, no need for personnel to enter the warehouse body, etc., and can mee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D3/00F42D1/08
CPCF42D1/08F42D3/00
Inventor 黄以寿魏昆仑杨军
Owner HUAIBEI MINING IND
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