始于80年代前半期的露天矿采矿机,起初是用于切削煤、石膏等软岩。近年来,国外也正在用其切削中硬岩的石灰岩。这次有机会参观唯一制造用于硬岩的采矿机的生产厂家——奥地利维尔特根(Wirtgen)公司的露天矿采矿机(Surface miner)的作业现场。特予以介绍。参观地点①美国得克萨斯州圣安东尼奥市郊公路扩宽工程(石灰质粉砂岩、泥灰岩)。②南斯拉夫洛文尼亚共和国切尔尼卡 The open pit mining machine, which began in the first half of the 1980s, was originally used to cut soft rock such as coal and gypsum. In recent years, foreign countries are also using them to cut hard rock limestone. This time we have the opportunity to visit the job site of the only surface miner in Wirtgen, Austria, the only manufacturer of mining machines for hard rock. Special to be introduced. Visit locations ① San Antonio, Texas, USA Suburban Highway Widening Project (calcareous siltstone, marl). ② Yugoslav Republic of Chernihiv