What are the initial signs of spontaneous combustion of coal?

Coal spontaneous combustion discovered sooner, more easily extinguished. Therefore, understanding and mastering the initial signs of coal spontaneous combustion and timely identification and judgment is of great significance for fire prevention. The initial signs of spontaneous combustion of coal a

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Coal mining subsidence prevention and control technology

I. Techniques for prevention and control of subsidence The prevention and control technology of subsidence damage can be considered from two aspects; (1) the control of mining subsidence, that is, through reasonable selection of mining methods and techniques, rational arrangement of mining face, ad

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