1、 毕业设计外文翻译 学 院 ： 机械与动力工程学院 专业名称 ： 机械设计制造及其自动化 年级班级 ： 2007 级 5 班 学生姓名： 葛少华 指导教师： 吕鲲 翻译部分 英文原文 Mine Hoisting In Deep Shafts In The 1st Half Of 21st Century Alfred Carbogno Key words: deep shaft, mine hosting, Blair winder, rope safety factor, drum sizing, skip factor Introduction The mineral deposits a
2、re exploited on deeper and deeper levels. In connection with this, definitions like “deep level” and “deep shaft” became more and more popular. These definitions concern the depth where special rules regarding an excavation driving, exploitation, rock pressure control, lining construction, ventilati
3、on, underground and vertical transport, work organization and economics apply. It has pointed out that the “deep level” is a very relative definition and should be used only with a reference to particular hydro-geological, mining and technical conditions in a mine or coal-field. It should be also strictly defined what area of “deep level” or “deep shaft” definitions are considered. It can be for example: - mining geo-engineering, - technology of excavation driving, - ventilation (temperature).
