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为适应我国露天矿山大型化建设,彻底改善露天矿大孔径穿孔设备的现状,由衡阳有色冶金机械厂、鞍钢矿山研究所、长沙矿山研究院联合研制成功穿凿孔径310～380 mm的YZ-55大型牙轮钻机。它是在消化引进设备的基础上,总结了国内外各类钻机的先进经验,吸收了YZ-35型牙轮钻机的优点,并有所创新,全部采用国产备件制造。它适用于大型露天矿穿凿各种硬度的矿岩。样机见本期封底。
To meet the large-scale construction of open-pit mines in our country, the status quo of large-aperture perforation equipment in open-pit mines has been completely improved. The joint venture of Hengyang Nonferrous Metallurgical Machinery Factory, Anshan Iron Mining Research Institute and Changsha Mining Research Institute successfully developed YZ-55 large- Drill rig. It is based on the digestion and introduction of equipment, summarizes the advanced experience of various types of rigs at home and abroad, absorbing the advantages of YZ-35-type cone drill, and some innovation, all made using domestic spare parts. It is suitable for mining large open pit mineral rock hardness of various. See the back cover of this prototype.