Co-mining tunneling method of seam roadway gas

A coal mining method and roadway technology, which is applied in ground mining, mining equipment, earth drilling and mining, etc., can solve problems such as climate warming, low utilization rate, and damage to the ecological environment, and achieve prevention of gas explosions, extended service life, and corrosion Mitigation effect

Active Publication Date: 2011-05-18
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] my country's coal seam gas reserves reach 35 trillion m 3 , but the utilization rate has been very low. Most of the gas is directly discharged into the atmosphere because the concentration is too low. Gas is a greenhouse gas. Direct discharge into the atmosphere will lead to climate warming and damage the ecological environment.

Method used

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  • Co-mining tunneling method of seam roadway gas
  • Co-mining tunneling method of seam roadway gas
  • Co-mining tunneling method of seam roadway gas

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Embodiment one, figure 1 image 3 As shown in Fig. 4 and Fig. 5, when the coal seam has no outburst danger identified by the outburst hazard, the steps of the coal seam tunnel gas co-mining excavation method are as follows:

[0023] a. figure 1 As shown, after the tunneling of the uphill roadway 5 is completed, the coal seam roadway 7 is driven into the coal seam 8 from the uphill roadway 5;

[0024] b. Construct an air-conditioning cavern 11 inside the coal seam roadway 7, and install a local ventilator 12, ventilation duct 15, air conditioner 13 and dust removal equipment 14 in sequence in the air-conditioning cavern 11;

[0025] c. Install two airtight doors 1 at intervals at the entrance of the coal seam roadway 7, which can pass through mine cars and pedestrians, so that a closed space is formed in the coal mining area. The carrying capacity of the two airtight doors 1 is required to be no less than 1MPa.

[0026] d. Lay a gas drainage pipeline inside the coal s...

Embodiment 2

[0032] Embodiment two, figure 2 image 3 As shown in Fig. 4 and Fig. 5, when the coal seam is identified as outburst risk, the steps of the coal seam roadway gas co-extraction tunneling method are as follows:

[0033] a. After the tunneling of the uphill roadway 5 is completed, a return airway 6 is excavated, and the transportation roadway 9 and the coal seam roadway 7 are sequentially excavated from the uphill roadway 5 to the coal seam 8; The arc-shaped pressure relief tunnel 10 is used to reduce the resistance of wind flow from the section return air tunnel 14 or the section transport tunnel 7 to the arc-shaped pressure relief tunnel 10 . Under the condition of not affecting the ventilation and normal use, the airtight door 4 of the mining area can be installed inside the air return roadway 6 and on the windward side of the intersection of the pressure relief roadway 10 and the air return roadway 6, so as to prevent the possibility of protruding high-pressure gas. The en...

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Abstract

The invention discloses a co-mining tunneling method of seam roadway gas. The port of a roadway is sealed to form a sealed space, therefore air outside the roadway can not enter the space, so that the concentration of the gas in the roadway is above 20%, the concentration of the oxygen in the roadway is lower than 12%, and gas loses explosion capability. A drawing pipe is connected to release high-concentration gas released in a working space. In order to prevent high pressure from forming when coal and gas extrude in the roadway, a circular arc-shaped pressure relief roadway is dug on the opening end of the roadway, and high-pressure gas generated by extrusion can be removed. An air conditioning system is arranged in the roadway to guarantee proper environment in the roadway, and workerswork in the sealed space under the condition of prepared safety protection. By utilizing the roadway tunneling method, the problem of gas explosion is fundamentally solved, fire hazard danger is alsoeliminated, and the damage to a human body caused by respirable dust is eliminated; and meanwhile, because the roadway does not have explosion danger, so that the co-mining tunneling method provided by the invention has no anti-explosion requirement on equipment, and has a good popularization value.

Description

technical field [0001] The invention relates to a coal seam roadway excavation method, especially a well-closed coal seam with uniform occurrence and no large faults, forming a space full of gas in the coal seam roadway, so that the oxygen concentration is lower than 12%, and the gas concentration is higher than 20% % and lose the risk of explosion, after doing a good job of safety protection, enter the roadway to implement the tunneling method of coal seam roadway gas mining. Background technique [0002] When excavating a coal seam roadway, it is easy to cause the gas to exceed the limit. Carrying out the roadway excavation operation in the outburst dangerous coal seam will easily lead to coal and gas outburst. Once a large amount of outburst gas explodes, it will bring serious damage to the mine, causing mass death and mass injury. ACCIDENT. At present, in China, accidents involving mass casualties and casualties basically all occur in gas explosion accidents. Although ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/16E21F7/00
Inventor 林柏泉吴海进杨威
Owner CHINA UNIV OF MINING & TECH
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