Open-pit mining - WikipediaOpen-pit, open-cast or open cut mining is a surface mining technique of extracting rock or . Machinery is minuscule compared to the size of this mine.piggyback machine in open pit mine,The application of mobile in-pit crushing and . - Amazon S3the application of crushing and conveying in open pit mines. This presentation examines .. four loading machines. Figure 5 - 200m ~300 kt/d .. Figure 12 - Piggy-back conveyor system at Ulan coal mines (Photo - Krupp). Figure 13 - Mobile pit.
piggyback machine in open pit mine