To address challenges of high operational costs and delayed parts supply for bulldozers at a major open-pit gold mine, Shantui deployed multiple SD90 high-horsepower units for waste dump operations. Equipped with high-output engines, reinforced drivetrains, and intelligent control systems, the SD90 achieves 95% availability with 21-hour daily cycles, boosting efficiency by 30%. Its cold-resistant design (-40℃ operation) and cost-saving performance delivered over $150,000 annual savings, driving subsequent orders and regional market adoption, establishing a benchmark for high-latitude mining efficiency.