265 Fig.5 Photo showing the underground conditions of the 10 m ultra-large mining-height working face during operation. 4.4 Engineering Significance of System Integration The successful field implementation demonstrates that 10-m fully mechanized longwall mining is achievable through system-level integration, rather than through isolated equipment upgrades. By treating surrounding-rock control, mining equipment, and operational coordination as a unified system, the project overcame long-standing technical barriers associated with ultra-large mining height. This integrated implementation approach provides a practical engineering reference for future applications of ultra-large-height longwall mining in extra-thick coal seams. 5. Field Performance and Engineering Results 5.1 Production Capacity and Operational Efficiency
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