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三、对分段崩落法几个問题的分析 (一)关于方案选擇和主要参数的确定 1.概述分段崩落法可分为有底部结构和无底柱(端部放矿)两大类。有底部结构分段崩落法又有许多不同的回采方案,故在确定采用分段崩落法之后,正确选择回采方案,同样具有十分重要的意义。从我国应用分段崩采矿法十多年的历史看,回采方案的演变和发展具有如下特点:
III. ANALYSIS OF SEVERAL PROBLEMS OF THE CAPSULE CAVITA (I) About the determination of the options and the main parameters 1. Introduction The caving method can be divided into two categories: bottom structure and bottomless ore drawing . There are many different schemes for subsided caving method with bottom structure. Therefore, it is also of great significance to determine the correct caving scheme after adopting sub-caving method. Judging from the history of over 10 years of applying the sub-mining method in our country, the evolution and development of the recovery program have the following characteristics: