1. Yuan, J., et al.: Coal use for power generation in China. Resour. Conserv. Recycl. 129, 443–453 (2018)
2. Wang, G., et al.: Intelligent and ecological coal mining as well as clean utilization technology in China: Review and prospects. Int. J. Min. Sci. Technol. 29(2), 161–169 (2019)
3. Yang, Z., et al.: Fracturing characteristics analysis of 800 meters deeper coalbed methane vertical wells. J. China Coal Soc. 41(1), 100–104 (2016)
4. Wang, P., et al.: Coal micrograph segmentation based on visual clustering. In: 9th World Congress on Intelligent Control and Automation (WCICA), pp. 683–687. IEEE, Taipei, TAIWAN (2011)
5. Jiang, M., et al.: The study of coal macerals enhancement based on adaptive Gamma correction. J. Chinese Elec. Micros. Soc. 39(01), 46–52 (2020)