عنوان مقاله [English]
Presently, a large number of civil and mining openings are excavated by mechanized machines. Similarly, geotechnical and mining boreholes as well as oil and gas wells are drilled as a result of penetrating bits in rock. The efficiency of such devices requires a full understanding of geological and geotechnical conditions of the working environment. One of the most important parameters in estimating costs and efficiency of mechanized excavation is wear properties of rock. In this paper, different rock abrasivity testing methods are briefly reviewed Furthermore, by introduction of a simple rating system for various methods, their efficiency, in relation to evaluation of wear in disk cutters of TBMs, is estimated. Based on the results, the Cerchar test can be used as a low cost and relatively efficient method to evaluate abrasivity of rocks. However, investigations showed that Cerchar method, despite its relative high efficiency, has significant shortcomings in evaluating the abrasive capacity of rock.