Experimental method for studying the source mechanism and disappearance mechanism of CO in underground coal mines

Abstract

The invention discloses an experiment device for underground coal mine CO source mechanism and disappearing mechanism research. The experiment device comprises a sealed box, wherein a cutting tool is arranged in the sealed box, a crusher is arranged in the sealed box, a crushing chamber is arranged on the crusher, a heating device is arranged on the crushing chamber, and an exhaust pipe, a gas taking pipe and two gas inlet pipes are arranged on the sealed box. The experiment device is used for providing a necessary and sufficient experiment environment for underground coal mine CO source mechanism and disappearing mechanism research. The invention further discloses an experiment method for underground coal mine CO source mechanism and disappearing mechanism research. Crushing treatment is conducted on a coal sample in an anaerobic environment under certain temperature condition, the CO gas concentration of the gas released out of the crushing chamber is detected, and the experiment method is simple and convenient. According to the experiment method for underground coal mine CO source mechanism and disappearing mechanism research, the coal sample is subjected to crushing treatment in the anaerobic environment, the crushing chamber is filled with nitrogen, then the coal sample is heated, then the concentration of the gas released out of the crushing chamber is detected, and the experiment method is simple and convenient.

Description

Technical field [0001] The invention belongs to the technical field of research on the source mechanism and disappearance mechanism of CO in underground coal mines, and specifically relates to an experimental method for studying the source mechanism and disappearance mechanism of CO in underground coal mines. Background technique [0002] The spontaneous combustion of the leftover coal in the coal mine goaf will produce a large amount of toxic and harmful gases, and the CO gas problem is the most prominent. In order to timely and effectively control the fire in the goaf, the working face will be closed when necessary to reduce air leakage, and relevant comprehensive fire-fighting measures will be taken in the fire area to achieve the purpose of extinguishing the fire. At this time, the goaf has formed a relatively closed space. Practice has shown that the CO gas in the goaf will disappear quickly during the fire extinguishing process, but the mechanism of its disappearance is st...

AI Technical Summary

Problems solved by technology

Practice has shown that CO gas in the gob will disappear rapidly during the fire extinguishing process, but the mechanism of its disappearance is still unclear. Scholars have two opinions: one is that the CO gas is diluted by the air leakage and taken away from the return air flow. Second, the CO in the goaf is absorbed by the residual coal, so it cannot be detected

Images