Outburst prevention method for close-distance coal seam group area of middling coal group

A short-distance, coal seam group technology, applied in the direction of earthwork drilling, gas discharge, safety devices, etc., can solve the problems of inaccurate positioning of drilling, complex geological conditions, high cost, etc., so as to improve the mining rate and safety production efficiency , Alleviate the connection tension and save the cost of gas treatment

Pending Publication Date: 2022-04-05
GUIZHOU PANJIANG REFINED COAL
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Problems solved by technology

[0006] Therefore, the existing technology has limited construction conditions, high cost, long treatment cycle, low comprehensive excavation single entry, and inaccurate positioning of boreholes for gas control in areas with complex coal seam occurrence geological conditions, soft coal seam, and high gas pressure. The problem that ordinary drilling cannot be accurately positioned

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  • Outburst prevention method for close-distance coal seam group area of middling coal group

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Embodiment 1

[0023] refer to figure 1 In the figure, 2-1 is the 112206 transportation lane, 2-2 is the 111806 transportation lane, 2-3 is the 111806 transportation lane, and 2-4 is the 111706 transportation lane. The construction conditions are limited, the cost is high, the treatment period is long, the single entry of comprehensive excavation is low, the drilling cannot be accurately positioned and the ordinary drilling cannot be accurately positioned when the gas control is carried out in areas with soft and high gas pressure. The invention adopts a regional outburst prevention method for short-distance coal seam groups in the middle coal formation. The method includes: constructing a gas drainage roadway 1 and arranging boreholes 3 to carry out regional pre-extraction for more than one coal seam at the same time. A gas drainage lane 1 can be used as a gas control lane for several mining faces at the same time, and can also be used as a high level lane.

[0024] Further, the method fur...

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Abstract

The invention discloses an outburst prevention method for a close-distance coal seam group area of a middling coal group. The method comprises the steps that a gas drainage roadway is constructed, and drill holes are formed to conduct area pre-drainage on one or more coal seams at the same time. The problems that in the prior art, when gas treatment is carried out on areas with complex coal seam occurrence geological conditions, soft coal seams and high gas pressure, construction conditions are limited, cost is high, the treatment period is long, comprehensive tunneling single-entry is low, drilling cannot be accurately positioned, and common drilling cannot be accurately positioned are solved.

Description

technical field [0001] The invention relates to an outburst prevention method for short-distance coal seam group regions of medium coal formations, and belongs to the technical field of coal mining. Background technique [0002] Jinjia Mine has not reached the approved production capacity since it was put into production. The main reason is that it is severely restricted by gas control. Gas control has become the most prominent contradiction restricting production capacity. Therefore, new technologies, new equipment, new processes, and new materials are used to cure Gas is the key to fully liberating coal mine productivity and releasing coal mine capacity. [0003] According to the occurrence of coal seams in Jinjia Mine, combined with the analysis of the "Regulations on the Prevention and Control of Coal and Gas Outburst" and the "Research Report on the Mining Protection Range of Jinjia Mine Protective Layer and Gas Control Technology", the upper coal formations 1#, 3#, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F7/00
Inventor 张仑
Owner GUIZHOU PANJIANG REFINED COAL
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