Device and method for safely treating coal bunker blockage under coal mine

Abstract

The invention discloses a device and method for safely treating coal bunker blockage under a coal mine. The device comprises a coupling blasting positioning pipe, a coupling blaster, a water tank anda hoisting winch, and prefabricated blasting cracks are formed in a blasting capsule. The method comprises the steps that 1, the coupling blasting positioning pipe is suspended; 2, a coal body archingposition is detected; 3, the coupling blaster is put in; 4, the coupling blasting positioning pipe is lifted; 5, the coupling blaster is filled with water; 6, blasting is conducted for blockage removal; and 7, the coupling blaster is detached, and the coupling blasting positioning pipe is reset. The position of the coupling blaster is positioned through the coupling blasting positioning pipe, a space is provided for lowering and moving of the coupling blaster, the liquid carbon dioxide blaster is wrapped with the blasting capsule for accommodating the filling water, thus gas is sealed througha water body at the moment of phase-change blasting of carbon dioxide, the gas cannot be dispersed with pores and holes, the filling water is promoted to do work so as to achieve coupling blasting ofcoal blockage of a coal bunker, no flame and high-temperature gas are generated during blasting, and no gas explosion is caused.

Description

technical field [0001] The invention belongs to the technical field of unclogging coal bunkers, and in particular relates to a device and method for safely handling coal bunker clogging underground in coal mines. Background technique [0002] The mine coal bunker is used as an intermediate storage device for storing coal and reloading. The raw coal in the coal bunker continuously flows in and out. The upper part of the raw coal bunker structure is a cylinder, and the lower part is a hyperbolic cone. The upper opening is large, the lower opening is small, and the raw coal falls from top to bottom by its own weight. As the falling raw coal flows in the conical coal bunker, the area gradually decreases when it flows downward. The raw coal flows from the inner wall of the coal bunker to the direction of the central coal falling pipe. When wet coal, gangue or large coal blocks , Gangue, easy to arch and cause blockage of the coal bunker. When the coal bunker is blocked, it is e...

AI Technical Summary

Problems solved by technology

When the coal bunker is blocked, it is easy to cause injury accidents when the coal bunker is blocked by artificially using steel drills or gangue to deal with it; when the explosive blasting is used to block the coal bunker, the high-temperature and high-pressure gas and flame generated by the explosive blasting are very easy to ignite the gas Or coal dust, it is easy to cause accidents such as gas explosions. At the same time, too much charge will also damage the stability of the surrounding rock of the coal mine or damage the structure of the coal bunker, affecting the service life.

Images