Analysis on time lag between coal mining face advancing speed and coal spontaneous combustion in goaf

In order to master the time lag law of the firing area occurred in the goaf,under the condition of the speed of the coal mining face advancing forward was varying,based on the original data of the coal spontaneous combustion in the coal mining face and the goaf collected from the underground mine,a time lag regressive analysis model was set up with the coal mining face advancing speed as the argument and the coal mining face advancing speed varied time as the dependent variable when the carbon monoxide density varied lag,on the supposition that other influences to the goaf coal spontaneous combustion causes were under the relative stable conditions and only to consider the coal mining face advancing speed variation influenced the coal spontaneous combustion in the goaf.According to the model,the variation occurred at different advancing speed of the coal mining face could be obtained and the lag time occurred at the coal spontaneous combustion in the goaf.The time lag regressive analysis model showed that when the coal spontaneous combustion variation lag in the goaf,the faster the advancing speed of the coal mining face was,the longer the time of the coal mining face advancing speed variation would be.