top coal 中文意思是什麼
top coal
解釋
煤層頂部煤-
The effects of different drawing interval and top - coal fragmental size on flow character of coal - gangue and sand, and on mixed degree of coal and gangue were analyzed during drawing top - coal
分析了不同放煤步距、頂煤塊度對放煤過程中煤矸砂流動形態、混矸程度的影響。 -
Preliminary study of overburden breakdown law with full mechanised top coal caving mining under thick and hard gneiss
硬厚片麻巖下綜放採煤覆巖破壞規律初探 -
For the tip - to - face roof stability, chock - fram type powered support only be applied to hard top - coal, shield - type powered support and chock - shield - type powered support can be applied to three top - coals
通過分析，為保證端面頂板穩定，支撐式液壓支架僅適用於頂煤為硬煤的條件下，掩護式和支撐掩護式支架在三種頂煤條件下均可以適用。 -
Study on bed - separated fissures of overlying stratum and interstice permeability in fully - mechanized top coal caving
綜放開采覆巖離層裂隙變化及空隙滲流特性研究 -
Coal spontaneous combustion prevention and control technology for coal mining terminal line of overlong fully mechanized top coal caving mining face
超長綜放工作面終采線處煤炭自燃防治技術 -
Spot testing on mechanical characteristics of surrounding rock in gates of fully mechanized top - coal caving face
綜放回採巷道圍巖力學特徵實測研究 -
Study on packing body supporting resistance of enter - in packing for in - situ gob - side entry retaining in fully - mechanized top - coal caving mining face
綜放巷內充填原位沿空留巷充填體支護阻力研究 -
The in - situ measurement and analysis of support resistance and top - coal movement in fully - mechanized top - coal caving face of a thick coal seam with dirt band had been carried out in some coal mine, the strata behavior and movement law of top - coal were revealed
摘要對某煤礦含夾矸煤層綜放面的支架工作阻力和頂煤移動進行了現場觀測和分析，揭示了其礦壓顯現和頂煤運移的規律。 -
If increasing drawing interval, the movement and flow range of top coal will enlarge, and the velocity gradient on flow cross - section will diminish, so that it is good for controlling the flow rate of thin sand among loose top coal
研究表明，加大放煤步距，頂煤運移流動的范圍變大，流動斷面內速度梯度變小，有利於控制細砂的下竄速度。 -
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。 -
Influence of the hydraulic support ' s beam length to the caving performance in the fully mechanized top - coal caving face
綜采放頂煤液壓支架頂梁長度對頂煤可放性的影響 -
Rapid advancing technology for top coal caving workface in densely sinking area of coal pillars
密集陷落柱區綜放工作面快速推進技術 -
Characteristics of ground pressure behavior in hard thick - top - coal fully mechanized caving face
堅硬煤層大放高綜放面礦壓顯現特點 -
Fully mechanized high top coal caving mining technology in hard coal seam of honghui no. 1 mine
紅會一礦堅硬煤層大放高綜采放頂煤開采技術 -
Summarize on the top - coal caving mining in huainan mining area
淮南礦區放頂煤開采實踐與對策 -
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 -
Regularity and characteristics of ground pressure when rapid advancing implemented in short - wall fully - mechanized top coal caving face
短壁綜放面快速推進礦山壓力顯現規律與特徵 -
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 -
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。 -
Discuss on coal ignition ' s precaution in fully mechanized top - coal caving mining
淺談放頂煤綜採煤炭自燃的防治
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