lump coal

基本解释

It is a kind of feasible research means for optimization of blasting parameters for increasing lump coal rate.
从而为提高煤块率的参数优化提供了一种切实可行的研究方法。
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.
提高块煤率、降低块煤限下率是当前无烟煤生产企业关注的焦点问题。
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.
为了研究不同冲击速度条件下块煤冲击韧度的变化特征，以及块煤节理方向性对块煤冲击韧度的变化特性。

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