Optimal Selection for Gas Prediction Index of Coal Spontaneous Combustion Under Different Conditions of Oxygen Concentration

For the coal spontaneous combustion features of Qingshuiying mine, we design temperature programmed temperature experimental furnace for coal spontaneous combustion, use furnace to carry on temperature programmed experiments and comparative analysis by Qingshuiying coal samples under the conditions of 3%, 5%, 9%, 13%, 17%, 21% of oxygen concentration, study the laws of gas generation under different oxygen concentration conditions, analyze the influence of variable oxygen concentration conditions on coal spontaneous combustion process, master the gas generation characteristics of coal oxidation. On this basis, we make optimal selection for index gases of Qingshuiying Coal Mine under different oxygen concentration environments.