Spontaneous combustion classification early warning and active classification prevention and control method for coal mine

Abstract

The invention discloses a spontaneous combustion classification early warning and active classification prevention and control method for mine coal. The method comprises the steps that (1), downhole environmental data is collected; (2), whether ethylene occurs in a downhole coal seam or not is judged; (3), whether the ratio of the change amount of carbon monoxide concentration and the change amount of oxygen concentration is less than the oxidation threshold value or not is judged; (4), whether to start the mine coal spontaneous combustion first-level early warning and implement active first-level prevention and control or not is determined; (5), the mine coal spontaneous combustion first-level early warning and active first-level prevention and control are carried out; (6), the mine coalspontaneous combustion second-level early warning and active second-level prevention and control are carried out; (7), the mine coal spontaneous combustion third-level early warning and active third-level prevention and control are carried out; (8), whether the real-time ratio of ethylene concentration value and ethane concentration value in the downhole coal seam reaches the maximum value or notis judged; and (9), the mine coal spontaneous combustion fourth-level early warning and active fourth-level prevention and control are carried out. The method uses multiple gas indexes to consider therelationship between the change of oxygen concentration and the degree of spontaneous combustion of coal, and avoids an early warning method by means of single index gas, comprehensively and quantitatively analyzing the degree of spontaneous combustion of the coal is achieved, and the accuracy of the early warning is improved.

Description

technical field [0001] The invention belongs to the technical field of coal spontaneous combustion prevention and control, and in particular relates to a mine coal spontaneous combustion classification early warning and active classification prevention and control method. Background technique [0002] Mine spontaneous combustion fires are likely to cause mine gas explosions. Fire extinguishing is often accompanied by water and coal vapor explosions. The toxic and harmful gases generated by the fire flow in the one-dimensional space below the mine, posing a great threat to the life safety of miners. The direct and indirect economic losses caused by spontaneous combustion in coal mines every year Nearly 10 billion yuan. The proportion of spontaneous combustion coal mines in my country accounts for about 52% of the key coal mines, and the proportion of spontaneous combustion accounts for more than 90% of the total number of fires. Therefore, the earlier and more accurate the pr...

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Problems solved by technology

[0003] However, the current early hazard prediction methods for coal spontaneous combustion mainly include gas analysis method, temperature measurement method, photoelectric method, ionization method, smoke method, magnetic force prediction method, etc., but due to the particularity of coal spontaneous combustion and the complexity of site conditions, etc., As a result, such hazard warning methods are difficult to meet the needs of modern intensive mine production

Most coal enterprises mainly use the beam tube monitoring system and safety monitoring system to detect and forecast mine fires. These methods generally only monitor a single fire gas indicator, and the comprehensive analysis and forecasting functions are not perfect. They can only target a single indicator In particular, the relationship between the spontaneous combustion degree of coal and the oxygen concentration is not considered, and various fire monitoring and forecasting systems operate independently, and information sharing is poor. There is a lack of comprehensive collection, processing and comprehensive analysis of fire information, and system errors The alarm rate is high, it is difficult to accurately determine the location of the fire, and achieve the purpose of danger warning

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