Abstract
The coalfield fire area is widespread in the world. Numerous coal resources have been destroyed because of the large-scale coalfield fires. Meanwhile, toxic and harmful substances, such as carbon monoxide, carbon dioxide, methane, sulfide, and nitrogen oxide, etc., are numerously generated. All of them threat the local ecological environment and the economic development. The occurrence and evolution processes are complex, challenging the scientific prevention and control for coalfield fire. Gas transport mechanism is one of the key points that influence coalfield fire evolution and its efficient prevention and control. This investigation mainly pays attention to the flow filed in underground coalfield fire area. Combining physical test and numerical simulation, the transition law of the main air supply channel in underground coalfield fire area is studied, and the distribution characteristics of flow field in the channels are revealed. These are of great significance for revealing the evolution process of coalfield fire.
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