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澳大利亚 ＪＡＱＵＥＳ公司生产的 ＲＢ４型圆锥破碎机，是三峡工程古树岭人工碎石加工系统的中破关键设备。该设备动锥总成（核心部件）主轴因事故，在距轴上端面３１５ ｍｍ处，出现一条深１０～１２ ｍｍ、长 ５３０ ｍｍ（占轴颈圆周长 ５５．３％）的环形裂纹。因该处承受
Australia JAQUES company RB4 cone crusher, is the Three Gorges Project Gusuling artificial broken stone processing system in the broken key equipment. Due to the accident, the main shaft of the moving cone assembly (core component) presents a ring-shaped crack of depth 10 ~ 12 mm and length 530 mm (accounting for 55.3% of the circumference of the journal) at a distance of 315 mm from the upper end of the shaft. Because of the place to bear