262 Cutting power (kW) 2×1200 Haulage power (kW) 2×250 Cutting depth (mm) 865,1000 Machine body height (mm) 3560 Matching drum diameter (mm) φ4800 Rocker arm structure type Split-type straight rocker arm Total swing angle of rocker arm (º) 73 Upward swing (º) 46 Downward swing (º) 27 Drum speed (r/min) 26、29.8 Haulage speed (m/min) 15/30 Total machine weight (t) 245 The dramatic increase in coal output per unit advance also necessitated a matching ultralarge-capacity scraper conveyor system. High-strength middle troughs, heavy-duty chains, and optimized drive systems were adopted to accommodate coal flow rates approaching 8,000 t/h, while ensuring reliable startup and long-term operation under heavy load conditions. The technical parameters of the scraper conveyor are listed in Table 2. Table 2 The technical parameters of the SGZ1600/3×2000 scraper conveyor Parameter Value Designed length (m) 325 Designed length (m) 300 Transport capacity (t/h) 8000 Installed power (kW) 3×2000kW Chain speed (m/s) 1.83 Chain specification (mm) φ60/135×181/197 Pin rail pitch (mm) 201 Middle trough specification (mm) 2400×1600×540 The coordinated development of the shearer and conveyor system ensures smooth coal cutting and transportation, preventing bottlenecks that would otherwise limit the effectiveness of ultra-large-height mining. 3.4 System Integration and Operational Reliability Beyond individual equipment breakthroughs, the success of 10-m longwall mining ultimately depends on system-level integration. The hydraulic shields, shearer, and scraper conveyor were designed and optimized as a unified system, with coordinated operating parameters and compatible mechanical and control interfaces.
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