Method for treating upper corner gas using methane-oxidizing bacteria

Abstract

The invention discloses a method for treating upper corner gas using methane-oxidizing bacteria, and belongs to the technical field of coal mine local gas preventing and treating. According to the method, creatures are used for solving the problem of the gathering of the gas at an upper corner of a coal mine, an under shaft air brattice of the coal mine is improved, a bacteria fluid tank is additionally installed on the air brattice, the air brattice is hung at a supporting frame at the upper corner, and a mixture of methane-oxidizing bacterial fluid and yellow mud fills a goaf which is proneto air leakage, close to a working surface, of a lower corner. Methane which floats to gather towards the upper corner from the goaf can be eliminated by the air brattice with the additionally installed bacterial fluid tank through oxidation, the methane-oxidizing bacteria at the lower corner can grow towards the interior of the goaf along the trajectory of air flow under the action of the air flow to oxidize the methane which is located on the working surface closely adjacent to the goaf, air leakage towards the goaf can be reduced by the yellow mud, and therefore the amount of the gas surging towards the upper corner from the goaf is reduced. The method has the advantages tha the defects of an existing coal mine local gas treating technology are compensated, the method is innovated to agreat extent, and the method is suitable for applying to coal mine sites.

Description

technical field [0001] The method belongs to the technical field of local gas prevention and control in coal mines, uses the characteristics of microorganisms and combines with engineering practice to solve the problem of gas accumulation in the upper corner, and is an innovation to the existing local gas prevention technology in coal mines. Background technique [0002] Existing methods to prevent gas accumulation at upper corners mostly use local ventilation technology, setting up wind barriers and other facilities, and changing the ventilation mode of the working face. The space on the working surface is not conducive to the movement of pedestrians and equipment. Changing the ventilation mode of the working surface, such as Y-shaped ventilation, makes the ventilation system complex and the maintenance cost is high. [0003] The existing method of using mine air curtains to solve the gas accumulation in the upper corner can only passively block the flow of gas in the upper...

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Problems solved by technology

[0002] Existing methods to prevent gas accumulation at upper corners mostly use local ventilation technology, setting up wind barriers and other facilities, and changing the ventilation mode of the working face. The space on the working surface is not conducive to the movement of pedestrians and equipment. Changing the ventilation mode of the working surface, such as Y-shaped ventilation, makes the ventilation system complex and the maintenance cost is high.

[0003] The existing method of using mine air curtains to solve the gas accumulation in the upper corner can only passively block the flow of gas in the upper corner, but still does not substantially solve the problem of gas accumulation. Instead, the gas is located near the upper corner in the goaf Accumulation, once the air curtain is not tightly sealed or damaged, the problem of gas accumulation exceeding the limit will still occur

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