1983年前,湖南省冶金矿山井巷掘进和回采工作中使用的装岩机,因机型陈旧,能耗高、效率低,零件无互换性,导致备件数量多,修理费用逐年增多,给矿山生产带来困难。我们对国内的产品通过优选方式更新换代产品和选择制造厂家,以解决上述矛盾。经调查、对比、试用,确定南昌通用机械厂为定点厂,该厂的Z—30、Z—20c装岩机为更新换代产品。 Before 1983, the rock loader installed in the tunneling and recovery work of the metallurgical mine shaft in Hunan Province, due to obsolete models, high energy consumption, low efficiency and non-interchangeable parts, led to a large number of spare parts and an increase in the cost of repairs year by year. Mines produce difficulties. Our domestic products through the preferred way to update the replacement products and select manufacturers to address these contradictions. After investigation, comparison, trial, to determine Nanchang General Machinery Factory sentinel plants, the plant’s Z-30, Z-20c rock loader for the replacement products.