State Key Laboratory of Coal Resources and Safe Mining;
and School of Geosciences and Survey Engineering;
China University of Mining and Technology;
Institute of Disaster Prevention;
Coal Geology and Prospecting Institute of Yunnan Province;
煤岩组成; 二叠纪末; 中国云南; 氧含量; 火灾; 大气; 证据; 晚二叠世;