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.
该系统保障了无油螺杆压缩机稳定运行，性能稳定，可保证生产的连续性，切片破碎率低，节约能耗。
The system ensured the stable operation of oil-free screw compressor and was reliable enough to guarantee steady and continuous production, low chip breakage and energy consumption.
对石油钻井过程中岩石破碎的分形机理及形成过程进行了研究，提出了一种以井底返出的岩屑为对象测试岩石可钻性的新方法。
This method takes the detritus returned from bottom hole as the studying object. The fractal mechanism and forming process of broken rock during drilling were studied.
不但造价低且具有观察、邮寄不易破碎、重量轻、可一次性使用的特点。
The utility model has the characteristics of a low cost, a light weight, is not easy to crush in mailing, and can be used once.
试验结果表明，经过哈氏可磨性测定仪后，各煤种的工业分析都发生了不同程度的变化，而煤粉破碎后的粒度分布取决于煤种的煤化程度，而与煤种的可磨性指数相关性较小。
The results(indicated) that the approximate analysis of the pulverized coal changed to different degrees, and the particle size distribution mainly depended on the coal rank but not the HGI.
试验结果表明，经过哈氏可磨性测定仪后，各煤种的工业分析都发生了不同程度的变化，而煤粉破碎后的粒度分布取决于煤种的煤化程度，而与煤种的可磨性指数相关性较小。
The results(indicated) that the approximate analysis of the pulverized coal changed to different degrees, and the particle size distribution mainly depended on the coal rank but not the HGI.
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