roof coal的意思|示意
留顶板煤
roof coal相关短语
1、 roof-coal 顶煤
2、 low-roof coal 低位放顶煤
3、 roof coal loss 顶煤损失
4、 caving roof coal 放顶煤
5、 roof-coal-caving 放顶煤
6、 unload roof coal 放顶煤
7、 roof-coal pillar 顶板
roof coal相关例句
The paper discusses the roof coal breakage principle, deformation breakage and retrieval law and analyzes factors affecting cover caving ability.
论述了综放开采的顶煤破碎机理、变形破碎及回收规律；
Analyses factors that affect cover caving ability of roof coal in sublevel caving mining method.
分析了放顶煤开采顶煤冒放性的影响因素.
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Mechanical model for the elastic thick outrigger of roof coal is set up.
建立了顶煤弹性深梁力学模型,分析了顶煤应力分布及顶煤破坏形式.
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Analyses factors that affect cover caving ability of roof coal in sublevel caving mining method.
分析了放顶煤开采顶煤冒放性的影响因素。
The loading affection on supports in process of transformation. the roof coal behaviour on the face zone and its caving character at cavity edge are expounded.
论述了顶煤介质状态转化对工作面支架的作用，不同强度顶煤在工作面控顶区上方的性态分布和放顶煤线处的垮落特点；