[1]School of Safety Engineering,China University of Mining&Technology,Xuzhou 221008,China;
[2]Key Laboratory of Gas and Fire Control for Coal Mines,Xuzhou 221008,China;
[1]School of Safety Engineering,China University of Mining&Technology,Xuzhou 221008,China;
[2]Key Laboratory of Gas and Fire Control for Coal Mines,Xuzhou 221008,China;
[3]Department of Civil&Environmental Engineering,University of Alberta,Edmonton T6G 2W2,Canada;
[3]Department of Civil&Environmental Engineering,University of Alberta,Edmonton T6G 2W2,Canada;
[1]School of Safety Engineering,China University of Mining&Technology,Xuzhou 221008,China;
[2]Key Laboratory of Gas and Fire Control for Coal Mines,Xuzhou 221008,China;
[1]School of Safety Engineering,China University of Mining&Technology,Xuzhou 221008,China;
[2]Key Laboratory of Gas and Fire Control for Coal Mines,Xuzhou 221008,China;
Coal spontaneous combustion; Surface drainage borehole; Hurst index; Rescaled range analysis; Methane drainage; Symbiotic disaster;