roof of coal seam 中文意思是什麼

roof of coal seam 解釋
煤層頂板
  • roof : n 1 屋頂，房屋；家屋。2 （放行李的）車頂；笠形罩。3 上頜。4 最高部，頂部；【礦物】頂板。5 【航空...
  • of : OF ＝Old French 古法語。
  • coal : n 1 煤，煤塊，煤堆。2 〈pl 〉〈美國〉（一堆）燒紅的煤。3 〈常 pl 〉〈英國〉（幾塊）供燃燒的煤。4 ...
  • seam : n 1 縫；線縫。2 介面；接縫；接合處；接合線。3 裂縫。4 （臉上的）皺紋。5 傷痕。6 【造船】（船板間...
  1. Methane drainage experimental research for the stress - relief roof stratum of working face of high gas coal seam

    高瓦斯綜采面頂板覆巖卸壓抽放瓦斯試驗研究
  2. 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
  3. Application of multifunction plank with trapezium - shed on supporting in seam with soft roof, floor and coal

    梯形棚多功能墊板在三軟煤巷支護中的應用
  4. Through analyzing on the different phenomena of gas pouring amount at different coal seam, different area at the same seam, different position at the same area, the coal thicknss, inclined angle, structure, roof and floor rock character and water content in coal est. geology factor are regarded as the main reason of effecting the gas pouring amount

    通過對不同煤層，同一煤層不同區域，同一區域不同地點瓦斯湧出量有很大差異現象的分析，認為煤層厚度、傾角、構造、頂底板巖性、煤中水分等地質因素是影響瓦斯湧出大小的主要原因。
  5. The test results show that the drawing interval of 1. 5 m is helpful for controlling dead - unconsolidated thin sandstone of coal seam roof and reduce sand ratio of drawn top - coal

    試驗結果表明，放煤步距採用三采一放有利於控制頂板極鬆散細砂巖，降低放出頂煤的含砂率。
  6. Application of type built - up roof beam in face of steep coal seam

    型組合頂梁在急傾斜採煤工作面的應用
  7. In order to optimize the parameters of running top coal under different coal and gangue fragmental size, on the basis of measuring and analyzing the distribution character of top - coal fragmental size, running top coal was studied for the coal seam with dead - unconsolidated thin sandstone roof by loose medium model experiment

    摘要為了優化不同煤矸塊度條件下的放煤工藝參數，在實測分析頂煤破斷塊度分佈特點的基礎上，採用散體模型試驗的方法對煤層頂板為極鬆散細砂巖條件下的放煤工藝進行了研究。
  8. On bolting support of roadway in extremely soft seam of coal mine with complex roof

    復合頂板極軟煤層巷道錨桿支護技術研究
  9. Study on coal seam roof gas drainage from the strike of annular fracture areas by the long drill method

    開採煤層頂板環形裂隙圈內走向長鉆孔法抽放瓦斯研究
  10. Because the loader and the moduls of elasticity exists part difference in key stratum and combinatorial key stratum, and the formulae of calculating the roof weighting step has difference, so there must be existing big error if we use the formulae of key stratum to calculate the shallow coal seam ' s weighting parameter

    大柳塔1203工作面按照關鍵層計算得出的頂板來壓步距與實際相差很大，而按照組合關鍵層計算得出的頂板來壓步距與實際基本吻合。
  11. The hardness and thickness of coal seam play a great role in the vertical distribution of stress in coal and the occurrence of rock bunt under the condition of hard roof and hard floor

    在「兩硬」條件下，煤層厚度與硬度的變化對煤體中的應力分佈有著很大的影響，從而對煤巖體系統中沖擊礦壓的發生有著很大的影響。
  12. Study on the zone with rich water of the roof rock of 3rd coal seam in xinglongzhuang mine

    興隆莊煤礦3煤頂板巖層富水性分區
  13. Experiment of supporting with meshing and bolting for entry driving along gob side within soft roof, soft floor and soft coal seam

    煤層沿空掘巷錨帶網支護的應用研究
  14. Analysis of the rational mining process with caving method for the extremely unstable coal seams soft seam, soft roof and soft floor

    三軟極不穩定煤層合理采放煤工藝分析
  15. Study on application of bolting with wire mesh in steep coal seam roadway with comprehensive roof and large tilt angle

    錨索網支護在大傾角復合頂板煤巷的應用實踐與分析
  16. Application of anchorage cable supporting technology in roadway with coal seam roof

    錨桿錨索聯合支護在大斷面巷道中的應用
  17. Practice of first roof caving technology at comprehensive mechanical mining face in steep thick coal seam

    急傾斜特厚煤層綜放工作面超段高初次放頂的實踐
  18. Roof control technology of mining roadway in 2 coal seam in liyazhuang colliery

    煤層回採巷道頂板控制技術研究
  19. The analysis on roof control of working face of medium - thickness coal seam comprehensive mechanized top coal caving method

    中厚煤層綜采放頂煤工作面頂板管理
  20. Application of fuzzy synthesis evaluation to coal seam roof stability

    模糊綜合評判在煤層頂板穩定性評價中的應用
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