Warning grading method and warning method for spontaneous combustion of coal

Abstract

The invention relates to the field of coal mine safety, in particular to a warning grading method and a warning method for spontaneous combustion of coal. The coal is prone to spontaneous combustion,and the warning for spontaneous combustion of coal is divided into six grades, namely, grey warning, blue warning, yellow warning, orange warning, red warning and black warning. The warning method includes the following steps: collecting O2, CO, CO2, CH4, C2H4 and C2H6 concentration data; judging the warning grade, and setting a warning threshold as R0, wherein the warning threshold of coal spontaneous combustion can be expressed by the following mathematical formula: R0={[O2]>18% union [CO]>50ppm} intersecting {[O2] belongs to (15%, 18%) union [CO]>100ppm} intersecting {[O2] belongs to (12%,15%) union [CO]>150ppm} intersecting {[O2]<12% union [CO]>200ppm}; and issuing a warning and taking measures according to different thresholds. The spontaneous combustion process of coal can be indicated more accurately and sensitively, and higher preventability is achieved.

Description

technical field [0001] The invention relates to the technical field of coal mine safety, in particular to a coal spontaneous combustion early warning classification method and an early warning method. Background technique [0002] Mine coal spontaneous combustion is one of the five major disasters in coal mines. As of the end of 2015, there were about 9,000 coal mines in my country, more than 90% of which were spontaneously combustible and prone to spontaneous combustion, and about 90% of my country's coal was produced through underground mining. In mine fires, more than 85% to 90% are caused by coal spontaneous combustion. More than 130 large and medium-sized mining areas distributed in 25 major coal-producing provinces and regions across the country are threatened by coal spontaneous combustion to varying degrees. In recent years, with the advancement of science and technology and the upgrading of equipment, accidents caused by coal spontaneous combustion have been decre...

AI Technical Summary

Problems solved by technology

However, there are still some problems in the following aspects: there is still a lack of coal spontaneous combustion indicators suitable for coal mine sites, and the early warning technology for coal spontaneous combustion in coal seams that are prone to spontaneous combustion still needs to be perfected

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