Experiment study of optimization on prediction index gases of coal spontaneous combustion

• Published in: Journal of Central South University 2016-09, Vol.23 (9), p.2321-2328
• Main Authors: Niu, Hui-yong, Deng, Xiang-ling, Li, Shi-lin, Cai, Kang-xu, Zhu, Hao, Li, Fang, Deng, Jun
• Format: Article
• Language: English
• Subjects: Carbon monoxide; Civil; Coal mines; Coal mining; Combustion; Energy and Traffic Engineering; Engineering; Gas sampling; Gases; Geological; Laboratories; Metallic Materials; Oxidation; Spontaneous combustion; Weather forecasting
• ISSN: 2095-2899; 2227-5223
• DOI: 10.1007/s11771-016-3290-y

The coal of Anyuan Mine has the characteristic of easy spontaneous combustion. Conventional method is difficult to predict it. Coal samples from this mine were tested in laboratory. The data obtained from laboratory determination were initialized for the value which was defined as “ K ”. The ratio of each index gas and value of “ K ”, and the ratio of combination index gases and value of “ K ”, were analyzed simultaneously. The research results show that for this coal mine, if there is carbon monoxide in the gas sample, the phenomenon of oxidation and temperature rising for coal exists in this mine; if there is C 2 H 4 in the gas sample, the temperature of coal perhaps exceeds 130 °C. If the coal temperature is between 35 °C and 130 °C, prediction and forecast for coal spontaneous combustion depend on the value of Φ (CO)/ K mainly; if the temperature of coal is between 130 °C and 300 °C, prediction and forecast for coal spontaneous combustion depend on the value of Φ (C 2 H 6 )/ Φ (C 2 H 2 ) and Φ (C 2 H 6 )/ K . The research results provide experimental basis for the prediction of coal spontaneous combustion in Anyuan coal mine, and have better guidance on safe production of this coal mine.