1513 A representative photograph of on-site operation of the 10-m longwall face is shown in Fig.5, from which the scale of the mining height and equipment can be identified. 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-largeheight longwall mining in extra-thick coal seams. 5. FIELD PERFORMANCE AND ENGINEERING RESULTS 5.1 Production Capacity and Operational Efficiency The 10-m fully mechanized longwall system was operated under full-scale industrial conditions at the Caojiatan Coal Mine. Field application demonstrated that single-pass extraction of an extra-thick coal
RkJQdWJsaXNoZXIy MTM0Mzk2