longwall 中文意思是什麼

longwall 解釋
長壁法回採
  1. The support power of the trend longwall coal face

    走向長壁高檔採煤工作面支護力
  2. The study on the movability of the face - contacted blocks in overlying strata above the longwall face in datong

    大同采場覆巖面接觸塊體可動性判定研究
  3. Analysis on strata pressure of fully mechanized longwall coal mining face in soft roof, soft coal and soft floor seam

    三軟煤層綜采長壁工作面采場礦壓分析
  4. 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。
  5. Formation and application of the front abutment pressure on longwall face

    論采場前方支承壓力的形成及應用
  6. Analysis and technological measures for longwall topple mining process at the big inclined angle seam

    大傾角煤層傾斜長壁仰斜開采工藝分析及技術措施
  7. 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
  8. Longwall shearing and heading machines ; shanks of cutting tools and their assembly openings

    長壁剪切機和鐓鍛機.切刀柄和其安裝開口
  9. Study on roof control in shallow seam longwall mining

    淺埋煤層長壁開采頂板控制研究
  10. In accordance with the occurrence behavior of roof strata and the fracture characteristics of key stratum in shallow seam longwall mining, studied post - buckling behavior of roof key stratum in the process of mining by using initial post - buckling theory, which derived a critical load and a breaking span of the main roof during the first weighting, determined the final subsidence and the maximum rotation angle for broken key stratum, and presented an application with the example of daliuta 1203 face

    摘要根據淺埋煤層頂板巖層的賦存特點和長壁開采時關鍵層的變形破斷特徵，應用初始后屈曲理論探討了開采過程中頂板關鍵層的后屈曲性態，得出了老頂初次來壓時頂板的臨界載荷和破斷步距，確定了頂板破斷后的極限下沉量和回轉角，並以神東礦區大柳塔1203工作面為例給出了工程實例。
  11. 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
  12. The strata behavior rule of longwall face with individual props in shallowly buried coal seam covered with thick soil was summarized

    實驗和觀測表明，盡管其上覆巖層的力學強度比較小，煤層埋深淺，但工作面初次來壓步距大，礦山壓力顯現劇烈，周期來壓臺階下沉量大。
  13. Mine fire prevention and control along goaf side of fully mechanized longwall top coal caving mining face

    綜放工作面沿空側采空區防滅火治理
  14. 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
  15. Discussion on layout of top coal gateway for fully mechanized longwall top coal caving mining face

    常村礦超長孤島綜放面礦壓觀測及顯現特徵
  16. Longwall and longhole blasting coal mining method for difficult mining seam

    難採煤層巷道長壁長孔爆破採煤方法簡介
  17. Feasibility studies on longwall top - coal caving mining in no. 2 1 2 seam of ruqigou coal mine

    急傾斜特厚煤層綜放開采實踐
  18. Study on microseismic monitoring for spatial structure of overlying strata and mining pressure field in longwall face

    采場覆巖空間破裂與采動應力場的微震探測研究
  19. 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
  20. Application of longwall mining method in steeply inclined seam

    在急傾斜煤層中巷道長壁採煤法應用
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