Acknowledgments The research was supported by the National Basic Research Programme of China (973 Project) (2011CB201205), National Natural Science Foundation of China (51474211), and the National Key Technology R&D Program (2012BAK04B07).
To promote gas extraction in low-rank high-gas coal beds, the pore structure characteristics of the coal and their effect on gas desorption were studied. The results show that micropores are relatively rare in low-ran...