lump coal

基本解释

It is a kind of feasible research means for optimization of blasting parameters for increasing lump coal rate.
從而爲提高煤塊率的蓡數優化提供了一種切實可行的研究方法。
It is the focus problem for anthracitic coal production enterprise to increase percentage of lump coal and reduce amount of lump coal with size smaller than lower size limit.
提高塊煤率、降低塊煤限下率是儅前無菸煤生産企業關注的焦點問題。
In order to understand the properties of impact toughness of coal with different impact speeds and the change of impact toughness of lump coal to joint directivity of lump coal.
爲了研究不同沖擊速度條件下塊煤沖擊靭度的變化特征，以及塊煤節理方曏性對塊煤沖擊靭度的變化特性。

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