There are various hypotheses about coal formation 1,2. These hypotheses are closely tied to paleoclimatic conditions and redox environments. Currently, there is little controversy regarding the impact ...

The current geochemical view is that hydrocarbons generated from organic matter disseminated in fine-grained sedimentary rocks and coals are controlled primarily by temperature and duration of heating ...

Thick-coal-seam with complex structures and thick-hard roof in the initial mining phase pose various challenges, including a long weighting interval, strong rock pressure, poor top coal caving ...