267 was realized under extreme conditions. Field results demonstrate that the 10-m longwall system enables high-efficiency, high-recovery, and reliable production, providing a new technical pathway for the development of extra-thick coal seams and establishing a new benchmark for longwall mining worldwide. Acknowledgement This work has been supported by the National Natural Science Foundation of China (grant no. 52325403). References National Bureau of Statistics of China. (2025). Statistical Communiqué of the People’s Republ ic of China on the 2024 National Economic and Social Development. Available at:https ://www.stats.gov.cn/sj/zxfb/202502/t20250228_1958817.html (in Chinese) Wang, J., Yu, B., Kang, H., Wang G., Mao D., Liang Y. and Jiang P., (2015). Key technologies and equipment for fully mechanized top-coal caving operations with a large mining height at ultra-thick coal seams. International Journal of Coal Science and Technology, 2(2): 97–161 (2015). Xu, G., Zhang, Z., Yang, J., Liu, Z. and Li Z., (2022). Interaction between support and surrounding rock in an 8.8 m super-large mining-height working face. Journal of China Coal Society, 47(4): 1462–1472. (in Chinese) Yang, J., (2017). Research on key mining technology of fully mechanized working face with 8 m large mining height. Coal Science and Technology, 45(11): 9–14. (in Chinese) Yang, J.(2019). Key technologies and equipment for 8.8 m intelligent super-large mining-height fully mechanized working face. Coal Science and Technology, 47(10): 116–124. (in Chinese)
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