Three-dimensional ventilation method and system for mining by 110 construction method in coal and gas outburst mines

Patent metadata

Field	Value
Publication number	US-12168932-B2
Application number	US-202117922066-A
Country	US
Kind code	B2
Filing date	Apr 30, 2021
Priority date	Apr 30, 2020
Publication date	Dec 17, 2024
Grant date	Dec 17, 2024

Abstract

The present disclosure relates to the technical field of mine ventilation, and in particular, to a three-dimensional ventilation method and system for mining by 110 construction method in coal and gas outburst mines. The three-dimensional ventilation method comprises: constructing a first process roadway and/or a second process roadway before stopping the working face; forming a first roof-cutting and roadway retaining section by a part of the working face track gate located in the goaf, and/or forming a second roof-cutting and roadway retaining section by a part of the working face transport gate located in the goaf during the stopping process of the working face, so that the air inlet of the first roof-cutting and roadway retaining section enters the gas drainage air return roadway through the first process roadway to form return air, and/or the inlet air of the second roof-cutting and roadway retaining section enters the gas drainage air inlet roadway through the second process roadway to form return air, the three-dimensional ventilation system is constructed by using the gas drainage air inlet roadway and the gas drainage air return roadway, during the conversion from the 121 construction method to the 110 construction method, a complete ventilation system can be formed in the roadway retaining section, real-time monitoring of the roadway retaining section can be carried while eliminating harmful gas accumulation in the retaining section.

First claim

What is claimed is:

1. A three-dimensional ventilation method for mining by 110 construction method in coal and gas outburst mines, suitable for a coal mining area, wherein a ventilation system of the coal mining area comprises an air inlet main roadway, an air return main roadway, a coal mining working face, a working face transport gate, a working face track gate, a gas drainage air inlet roadway and a gas drainage air return roadway, wherein, the three-dimensional ventilation method comprises:
constructing a first process roadway and/or a second process roadway before stopping the working face, wherein one end of the first process roadway is connected with an end of the working face track gate away from the air return main roadway, the other end of the first process roadway is connected with the gas drainage air return roadway, one end of the second process roadway is connected with an end of the working face transport gate away from the air inlet main roadway, the other end of the second process roadway is connected with the gas drainage air inlet roadway; and
forming a first roof-cutting and roadway retaining section by a part of the working face track gate located in a goaf, and/or forming a second roof-cutting and roadway retaining section by a part of the working face transport gate located in the goaf during a stopping process of the working face, so that the air inlet of the first roof-cutting and roadway retaining section enters the gas drainage air return roadway through the first process roadway to form return air, and/or the inlet air of the second roof-cutting and roadway retaining section enters the gas drainage air inlet roadway through the second process roadway to form return air.

2. The three-dimensional ventilation method of claim 1 , further comprising the steps of:
providing a ventilation line of the ventilation system;
feeding air is through the gas drainage air inlet roadway and the working face transport gate;
returning the air through the gas drainage air return roadway and the working face track gate; and
diverting a first part of inlet air of the working face transport gate to the coal mining working face and then returning the first part of the inlet air by the working face track gate;
diverting a second part of the inlet air of the working face transport gate to the second roof-cutting and roadway retaining section; and
merging the second part of the inlet air with the inlet air of the gas drainage air inlet roadway through the second process roadway, and then entering the gas drainage air return roadway for return air.

3. The three-dimensional ventilation method of claim 2 , wherein, a part of the working face transport gate located in the goaf forms a second roof-cutting and roadway retaining section during the stopping process of the working face, and a part of the working face track gate located in the goaf does not retain roadway.

4. The three-dimensional ventilation method of claim 1 , further comprising the steps of:
providing a ventilation line of the ventilation system;
feeding air through the gas drainage air inlet roadway and the working face transport gate;
returning the air through the gas drainage air return roadway and the working face track gate;
after inlet air of the working face transport gate passes the coal mining working face, diverting a first part of the air to the working face track gate for return air; and
diverting a second part of the air to the first roof-cutting and roadway retaining section and entering the gas drainage air return roadway through the first process roadway for return air.

5. The three-dimensional ventilation method of claim 4 , wherein, during the stopping process of the working face, a part of the working face transport gate located in the goaf does not retain roadway, and a part of the working face track gate located in the goaf forms the first top-cutting and roadway retaining section.

6. The three-dimensional ventilation method of claim 1 , further comprising the steps of:
providing a plurality of ventilation lines of the ventilation system;
feeding air through the gas drainage air inlet roadway, the working face transport gate and the working face track gate, and returning the air through the gas drainage air return roadway;
diverting a first part of inlet air of the working face transport gate to the coal mining working face and merging the first part of the inlet air with the inlet air of the working face track gate, and then passing the first roof-cutting and roadway retaining section and the first process roadway in turn, then entering the gas drainage air return roadway to form return air; and
diverting a second part of the inlet air of the working face transport gate to the second roof-cutting and roadway retaining section, then merging the second part of the inlet air with the inlet air of the gas drainage air inlet through the second process roadway, and then forming return air that enters the gas drainage air return roadway.

7. The three-dimensional ventilation method of claim 6 , wherein, during the stopping process of the working face, a part of the working face track gate located in the goaf forms the first roof-cutting and roadway retaining section, and a part of the working face transport gate located in the goaf forms the second roof-cutting and roadway retaining section.

8. A three-dimensional ventilation system for mining by 110 construction method of coal and gas outburst mines, wherein:
the ventilation system comprises an air inlet main roadway, an air return main roadway, a coal mining face, a working face transport gate, a working face track gate, a gas drainage air inlet roadway, a gas drainage air return roadway, a first roof-cutting and roadway retaining section and a second roof-cutting and roadway retaining section;
a part of the working face track gate located in a goaf forms the first roof-cutting and roadway retaining section and/or a part of the working face transport gate located in the goaf forms the second roof-cutting and roadway retaining section;
the ventilation system further comprises a first process roadway or a second process roadway, one end of the first process roadway is connected with an end of the first roof-cutting and roadway retaining section away from the air return main roadway, the other end of the first process roadway is connected with the gas drainage air return roadway, one end of the second process roadway is connected with an end of the second roof-cutting and roadway retaining section away from the air inlet main roadway, the other end of the second process roadway is connected with the gas drainage air inlet roadway.

Assignees

• Univ China Mining

Inventors

• Wang Jiong
• Li Wenfei
• Ma Zimin
• Yu Guangyuan
• He Manchao
• Chen Gonghua
• Xiao Guoqiang

Classifications

• E21F7/00 Primary

  Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose · CPC title

• E21C41/18

  for brown or hard coal · CPC title

• E21F1/006 Primary

  Ventilation at the working face of galleries or tunnels · CPC title

• E21F1/10

  Air doors ({E21F1/003 takes precedence; air locks E21F1/145; dam doors E21F17/12}; doors in general E06B) · CPC title