Research on Spontaneous Combustion of 2-2 Coal Seam Law and Countermeasures in Selian No. 2 Coal Mine
CHENG Bai-wang
ZHAO Qing-wei
YU Ya-nan
Abstract：According to the spontaneous combustion characteristics of 2-2 coal seam and mining situa‐tion of 12205 working face in Selian No.2 Coal Mine ,the 2-2 coal seam spontaneous combustion law was studied by simulating experiment and mining practice. The results show that :(1)spontaneous combustion period of 2 -2 coal seam is short (less than 20 days in actual field) ,strong oxygenation , heating up fast ,can be oxidized under poor oxygen (oxygen concentration 3% ~5% ) ,and later develo‐ping rapidly (after reaching 150 ℃ ,can burn in a day);(2)two gases of ethane (C2 H6 ) and ethylene (C2 H4 ) can be used as index gases of coal temperature reaches about 50 ℃ in gob ;(3 )the value of 1 000 times CO/ΔO2 can be used as warning index of coal oxidation speed in gob ,when the value is less than 2 ,working face can normally mining. When the value is more than 2 ,it indicates the quantity of coal is increasing or the speed of coal oxidation is accelerating in gob ,we should take continuous in‐jection nitrogen gas or other fire prevention and control measures.
Keywords：spontaneous combustiongobair leakage and oxygen supplyfloat coal thickness
Publication Date：2015-04-02
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 30-33,26 )