longwall with caving 中文意思是什麼

longwall with caving 解釋
崩落式長壁開采
  1. The conventional methods for mining such seams including the longwall blasting and block caving suffer form the drawbacks of being low in recovery, high in labor intensity and low in efficiency. after shifting to the use of the fully - mechanized extraction system by the zhaogezhuang branch mining industry co. of kailuan ( group ) co., the mining of the pitching seams has met with remarkbable social and economic result

    針對大傾角煤層長壁炮采、落垛等採煤方法，存在回採率較低、員工勞動強度大、高產高效受限及安全等諸多問題，開灤（集團）趙各莊礦業分公司在探討大傾角煤層採煤工藝的改革及實踐大傾角煤層綜合機械化採煤過程中，取得了較好的社會經濟效益。
  2. Mining horizontal pillars with hydraulic roof propping in longwall caving method

    在長壁式崩落法中用液壓支柱護頂回採水平礦柱
  3. Application of bolt, steel mesh and anchor combined support to open - off cut of fully mechanized longwall mining face with top coal caving technology

    錨網索耦合支護技術在南屯煤礦綜放切眼支護中的應用
  4. Fully mechanized longwall top coal caving mining with light weight hydraulic powered supports applied to no. 30 seam mining in dongrong no. 3 mine

    輕放工藝在東榮三礦30號煤層開采中的應用
  5. Numerical analysis of control of hard roofs stepped cantilever structure for longwall mining with sublevel caving

    堅硬頂板綜放采場臺階式懸梁結構控制及其數值分析
  6. Application of bolt supporting in section roadway and large open - cut in longwall with top - coal caving face of xiagou coal mine

    下溝煤礦綜放工作面順槽及大斷面開切眼錨桿支護技術
  7. Analysis of longwall top coal caving in thick seams with parting band

    含夾矸厚煤層綜放開采技術分析
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