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 Advantages of multi-row millisecond blasting: The one-time blasting quantity is large, the blasting times and the blasting avoidance time are reduced, Mining Drilling Equipment , and the utilization rate of the stope equipment is improved; The broken quality of ore and rock is improved, and the boulder rate is reduced by 40 to 50% compared with that of single-row hole blasting; The efficiency of perforating equipment is increased by about 10% -15%, which is due to the increase of working time utilization coefficient and the decrease of the number of operations of perforating equipment and filling area after blasting; Improve the efficiency of mining and transportation equipment by about 10% -15%. 5. Multi-row hole differential extrusion blasting method It refers to the multi-row millisecond blasting in the case of residual muckpile in the working face. Transportation modes of open-pit mine: automobile transportation, railway transportation, belt transportation, slope skip lifting transportation and combined transportation, among which dump truck transportation is the most common. Mining and transportation are inseparable, and they influence and restrict each other. At present, the development trend of mining and transportation technology is mainly reflected in the large-scale mining and transportation equipment, the integration and continuity of mining and transportation links, and computer automation. 5. Rock discharge Rock dumping is the operation of the transport terminal, which transports the stripped topsoil and waste rock to the waste rock yard for disposal. Rock dumping process: rock dumping by railway transportation, road transportation and belt transportation. 6. Dump Waste dump (waste rock dump): a place where stripped materials are piled up, which refers to the place where mining wastes are discharged in a centralized manner. According to the stacking sequence, the dump can be divided into single-bench dump,DHD Drill bit, covering multi-bench dump and slope-pressing multi-bench dump. The dump is mainly divided into road transport dump, railway transport dump, belt transport dump and hydraulic transport dump according to the dumping process. Return to Sohu to see more Review of past issues Responsible Editor:. wt-dthtools.com