Continuous Rating for Diggability Assessment in Surface MinesAbstract. The rocks can be loosened either by drilling-blasting or direct excavation using powerful machines in opencast mining operations. The economics of rock excavation is considered for each method to be applied. If blasting operation is not preferred and also the geological structures and rock mass properties in site.in surface continuous mining equipment for diggability,Equipment selection for high selective excavation surface coal miningequipment selected. Moreover, equipment selection directly affects the pit design and production planning. In open pit mining, equipment selection is made according to many factors .. (ripping, shovel digging) machinery and continuous surface miners (CSM) . In this research, the diggability index rating method and its.