Abstract Wear occurs on mechanical tools during rock cutting and drilling, or any other kind of mechanical based excavation of rocks. The determination of rock abrasivity plays therefore a key role for estimating the tool's lifetime and for evaluating the economic efficiency. Due to simple design and convenient handling, the Cerchar abrasivity test is commonly used to assess the rock abrasivity and to predict the tool wear. However, the abrasivity index reflects only the abrasion of the stylus, and does not consider what happens on the tested rocks, as well as on how the stylus interacts with the rock during the scratching process. In this paper, an instrumented West apparatus is used to determine the applied horizontal force in the Cerchar test. The area under the force-displacement curve represents the consumed scratching energy. The material removed from the rock surface is measured using a digital microscope. Then, a new parameter called Cerchar specific energy, which is defined as the ratio of scratching energy to material removal volume, is proposed to assess the rock abrasivity, to describe the rock-stylus interaction, as well as to evaluate the efficiency of rock scratching, which can be used as indicator for rock cutting or drilling efficiency.

中文翻译：

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Cerchar 磨蚀性试验中划痕比能的研究及其在评估岩石-工具相互作用和岩石切割效率中的应用

摘要 在岩石切割和钻孔或任何其他基于机械的岩石开挖过程中，机械工具会发生磨损。因此，岩石磨蚀性的确定对于估计工具的使用寿命和评估经济效率起着关键作用。由于设计简单且操作方便，Cerchar 磨蚀性测试通常用于评估岩石磨蚀性和预测工具磨损。但是，磨蚀性指数仅反映了手写笔的磨损情况，并未考虑被测岩石上发生的情况，以及在刮擦过程中手写笔与岩石的相互作用情况。在本文中，仪器化的 West 设备用于确定 Cerchar 测试中施加的水平力。力-位移曲线下的面积代表消耗的刮擦能量。使用数码显微镜测量从岩石表面去除的材料。然后，提出了一个称为 Cerchar 比能的新参数，该参数定义为划痕能量与材料去除量的比值，用于评估岩石磨蚀性、描述岩石-触针相互作用以及评估岩石划痕效率，可作为岩石切割或钻孔效率的指标。