Method for treating top coal, immediate roof and upper roof

Abstract

The invention discloses a method for treating top coal, an immediate roof and an upper roof, and relates to the technical field of coal mining. The method comprises the following steps of: 1, constructing a plurality of first fracturing holes in an open-off cut in the length direction of the open-off cut; 2, mounting a fully mechanized mining support; 3, mounting a first carbon dioxide fracturingpipe in each first fracturing hole, and fracturing the open-off cut through the first carbon dioxide fracturing pipes; 4, constructing a plurality of second fracturing holes in an air return roadway in advance, and constructing a plurality of third fracturing holes in a transportation roadway in advance; 5, mounting second carbon dioxide fracturing pipes and third carbon dioxide fracturing pipes in the second fracturing holes and the third fracturing holes correspondingly, and fracturing one part of the air return roadway and one part of the transportation roadway through the second carbon dioxide fracturing pipes and the third carbon dioxide fracturing pipes correspondingly; and 6, starting coal mining, and fracturing the remaining part of the air return roadway and the remaining part ofthe transportation roadway while coal mining is conducted. The method is suitable for high gas and coal-gas outburst mines, and meanwhile harmful gas cannot be generated.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to a method for processing roof coal, direct roof and old roof. Background technique [0002] The method of dealing with top coal, direct roof and old roof commonly used in the coal mining process is to use explosives and detonators to blast, which mainly has the following defects: [0003] 1. It is only suitable for low-gas mines, mines with high gas and coal and gas outbursts, which has great potential safety hazards and can easily cause gas explosions in goafs and old ponds; [0004] 2. The explosion of explosives and detonators produces a large amount of harmful gas, which endangers the health of workers. [0005] Therefore, how to overcome the above defects has become an urgent problem for those skilled in the art. Contents of the invention [0006] In order to solve the above technical problems, the present invention provides a method for treating roof coal, direct roo...

AI Technical Summary

Problems solved by technology

[0003] 1. It is only suitable for low-gas mines, mines with high gas and coal and gas outbursts, which has great potential safety hazards and can easily cause gas explosions in goafs and old ponds;

[0004] 2. The explosion of explosives and detonators produces a large amount of harmful gas, which endangers the health of the staff

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