Method for preventing and treating spontaneous combustion disaster in coal mine goaf utilizing high thermal conductive fiber

Abstract

The invention discloses a method for preventing and treating a spontaneous combustion disaster in a coal mine goaf utilizing high thermal conductive fiber, and belongs to the field of mining safety. The method comprises the steps that the high thermal conductive fiber is laid in the coal mine goaf and covers the main region of oxidation and spontaneous combustion of residual coal in the goaf; the heat released from the oxidation and spontaneous combustion of the coal is absorbed by the high thermal conductive fiber; the fiber is collected into a bundle at the corner of air return on a working face and connected to the outer side of the goaf; and the fiber bundle is connected with a circulation cooling device and absorbs the heat transferred by the thermal conductive fiber through the circulation cooling device, the internal temperature of the goaf is reduced, and the effects that the oxidation and spontaneous combustion of the residual coal in the goaf are prevented and the temperature in a fire area is reduced are achieved. A spontaneous combustion fire in the coal mine goaf can be prevented and treated safely and efficiently, the unsealing speed in the fire area is accelerated, and the reburning risk is reduced.

Description

technical field [0001] The invention relates to a method for preventing and controlling spontaneous combustion disasters in goafs of coal mines by using high thermal conductivity fibers, which belongs to the field of mining safety. Background technique [0002] Coal spontaneous combustion disasters are common in underground coal mines in my country. Affected by the mining process, there are a large number of coal residues and caving rocks in the gobs of coal mines, which provide a good thermal storage environment for coal oxidation and self-heating. Coal spontaneous combustion fires will release toxic gases such as CO, endangering the lives of miners. The current coal spontaneous combustion prevention and control methods mainly rely on grouting, nitrogen injection and other technologies. Although it can reduce the oxygen concentration in the goaf and inhibit combustion, it cannot eliminate the heat accumulated in the goaf. High temperature points still exist in the goaf, bec...

AI Technical Summary

Problems solved by technology

The current coal spontaneous combustion prevention and control methods mainly rely on grouting, nitrogen injection and other technologies. Although it can reduce the oxygen concentration in the goaf and inhibit combustion, it cannot eliminate the heat accumulated in the goaf. High temperature points still exist in the goaf, because Coal and rock have poor thermal conductivity, and the cooling process of the goaf is slow, and the high temperature usually lasts for dozens of days or even longer

Especially for gobs where spontaneous combustion fires have occurred, it takes a long time to resume production after sealing the fire area, and recombustion of the fire area is prone to occur after unsealing

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