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目前地下采矿爆破后的大矿石块,其二次破碎已由传统的爆破法多改用机械破碎法。为满足这一需要,北京钢铁学院和宜化采掘机械厂共同研制了YSJ-5000型地下液压碎石机,并已于1986年12月经冶金部组织和通过了部级鉴定。YSJ-5000型碎石机是二次破碎的机械设备,配备一台YS-5000液压碎石器进行工作,适用于4×3m~2断面的采矿巷道、中小露天采场和国防施工的二次破碎,还可用于工程施工中拆毁混凝土基础及道路等。
At present, after the blasting of large ore blocks in underground mining, the secondary crushing has been changed from the traditional blasting method to the mechanical crushing method. To meet this need, Beijing Iron and Steel Institute and Yihua Mining Machinery Factory jointly developed the YSJ-5000 underground hydraulic rock crusher, which was organized and passed the ministerial appraisal by the Ministry of Metallurgy in December 1986. The YSJ-5000 crusher is a secondary crushing machine and is equipped with a YS-5000 hydraulic lithotripter. It is suitable for mining tunnels, medium and small open pits, and secondary construction of 4×3m~2 sections. Broken, can also be used to demolish concrete foundations and roads during construction.