Method for preventing and controlling rock burst and gas emission of high-length short-distance drilling linkage

Abstract

The invention relates to a method for preventing and controlling rock burst and gas emission of high-length short-distance drilling linkage. The method comprises the steps that in the tunneling process of a roadway of a recovery work surface of an underground coal mine, a process roadway is formed in the middle of the work surface, so that the process roadway and upper and lower through grooves ofthe work surface form a ventilation system in U and L shapes, and the ventilation system is easier and more stable and reliable. Top plate super-front deep hole presplitting blast holes are constructed in the process roadway, super-front presplitting holes of upper and lower ends of the construction work surface, close to the upper edge of the upper through groove and close to the lower edge of the lower through groove are used for performing presplitting blasting on a coal bed and a top plate of the coal bed, and the disaster of rock burst of the work surface is prevented and controlled. Through presplitting blast, the top plate of the coal bed generates a large quantity of secondary interstices, so that a good channel is provided for long-distance and short-distance high-position boringexploitation of pressure relief gas when construction is performed in the process roadway and the upper through groove in the recovery period of the work surface, the gas emission intensity of air return corners of the work surface in the recovery period can be greatly lowered, and the safe and efficient exploitation of the work surface are practically guaranteed.

Description

technical field [0001] The invention relates to a technology for preventing and controlling rockburst and gas co-occurrence disasters in coal mines, in particular to a method for preventing and controlling rockburst and gas gushing through high-position, long-distance and short-distance drilling linkage. Background technique [0002] my country is the world's largest coal producer and consumer, with coal reserves accounting for 45.7% of the world's total, ranking first in the world, and coal production accounting for about 38.2% of the world's total output. Coal occupies an important position in my country's energy structure, accounting for about 60%, which is of great significance to my country's economic development. However, my country is also the country with the most serious coal mine accidents in the world, especially gas disaster accidents, accounting for more than 35% of the total number of coal mine accidents. The occurrence of gas disaster accidents has caused a l...

AI Technical Summary

Problems solved by technology

[0004] (1) The ventilation system of the traditional high-gas mine mining face with rock burst generally adopts the "U + process lane" roadway layout, which is likely to cause series ventilation of the working face and affect the gas control in the upper corner of the working face

[0005] (2) During the construction of the process roadway, if the local fan stops running, etc., the gas in the process roadway needs to be discharged, which will affect the fully mechanized mining production of the working face; the concentrated blasting method is adopted for the advanced pre-split blasting roof of the process roadway, and the blasting produces toxic The high concentration of harmful gases will affect the safe production of the working face, so it is necessary to stop the working face during the blasting period and evacuate the personnel to a safe place

[0006] (3) After the advanced pre-splitting blasting in the process lane, a large amount of coal is broken, and the long-term air supply is likely to cause the coal body to oxidize and heat up. After taking protective sealing measures, it is necessary to unseal in advance when the working face is mined to the process lane, resulting in Material and labor input costs increase and affect normal production operations

[0007] (4) The roof of the working face of mines with rock burst disasters is generally hard. The blasting effect of the craft lane under the ventilation mode of "U + craft lane" is not good. The ceiling is suspended, resulting in a larger amount of gas gushing than before

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