岩石破碎的好坏对矿山工程在经济上和生产效率上有极为重要的影响，为提高爆破效率，需对岩石的可爆性进行分类。
In mining project, rock crushing has great effect on economics and productive efficacy. In order to improve blasting efficacy, it is necessary to classify the rock in terms of its blastability.
岩石力学性质和可钻性是分析和评价岩石抵抗破碎和钻进的基本性质，也是合理选择碎岩工具和工艺的基础。
The mechanical property and drillability of rocks are the basic quality available for analyzing and evaluating the anti fracture and drilling resistance of rocks.
可磨性是煤加工利用过程中的一个重要指标，可磨性指数与煤的破碎机理、煤粒破碎后的粒度分布均有关系。
The grindability of coal is an important parameter in pulverized coal utilization, and the HGI(Hardgrove Grindability Index) is relevant to the coal pulverization and the particle size distribution.
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