heading-and-bench method 中文意思是什麼

heading-and-bench method 解釋
向下梯段式采礦法
  • heading : n 1 標題，題名；題詞，信紙上端所印文字。2 斬首；（魚）去頭；（植物的）打尖，摘心。3 【建築】露頭...
  • and : n. 1. 附加條件。2. 〈常 pl. 〉附加細節。
  • bench : n 1 長凳，條凳。2 船上的坐板；座，架，（木工、鉗工等的）工作臺；【礦物】（煤礦的）臺階，（礦的）...
  • method : n 1 方法，方式；順序。2 （思想、言談上的）條理，規律，秩序。3 【生物學】分類法。4 〈M 〉【戲劇】...
  1. Using fem ( finite element method ), the paper makes mechanical analyses on bench cut method and side heading method, it also makes mechanical analyses on some auxiliary construction methods, such as big pipe - roof protection, horizontal roll - spraying, big and small angle pipe - roof protection and surface grouting

    論文採用有限元的分析方法，主要對臺階法、側壁導坑法進行了力學分析，也選擇了大管棚法、水平旋噴法、大小外插角管棚法和地表注漿加固四種輔助工法進行力學分析。
  2. The paper introduces the progress and the statue quo of tunnel portal construction, discusses the condition to employ full face method, bench cut method, single side heading method and double sides heading method of portal construction, points out advantages and disadvantages of these methods. the order to adopt these methods of single track, double track and tri - track tunnel in shallow - depth, uneven pressure and incompact ground is also advised after compare

    討論了全斷面法、臺階法、單側壁導坑法和雙側壁導坑法在隧道洞口段施工中的使用條件和優缺點，對這四種施工方法從各個方面進行了比選，提出了單線、雙線和三線隧道的洞口段處于淺埋、偏壓、鬆散的地層中時各種施工方法選擇的先後順序。
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