Open pit mining process
Perforation blasting, mining, transportation, earth dumping, drainage, and recessed ventilation
1. Perforated blasting equipment:
200～380mm roller drill, 100～250mm down-the-hole drill, rock drill ; Mine explosive: select the corresponding explosive according to the nature of the rock and environmental conditions; Hole network parameters: good effect, less money, hole spacing, row spacing, dose , detonation sequence, explosion pile; wear location: according to the location specified by the mining plan construction, is an important factor to adjust the stripping ratio;
2, mining work equipment:
Electric shovel (19m3), hydraulic shovel, backhoe, front loading machine, auxiliary equipment; working surface parameters: step height, length of mining area, mining width, working flat width, slope angle, sloping angle, production stripping ratio, Finally, the slope angle and slope are stable;
3. Mineral rock transportation and transportation tasks:
Ore from the face to the processing plant, from the rock face to the dump; mode of transport: motor transport, railway transport, tape transport, combined transport; continuous, intermittent; transport equipment: mining trucks (200t), electric wheel ( 350t), locomotive, mine car, tape (coarse crush); related work: road design, railway and station design;
4. Dumping work:
Transporting the stripped material to a dedicated site for safe disposal is one of the main production processes for open pit mining. If the dumping space is insufficient, it will hinder the continuous production of the mine. Dumping methods: car transport dumping, railway transport dumping, tape strip Earthmoving excavation; Dumping site construction: effective use of volume, slope stability, covering soil and land;
5, the danger of water leakage and drainage:
Equipment efficiency is low, engineering progress is slow, and slope is destabilized; water inrush factors: surface water, rock water, water in fracture zone, water in waste pit, unsealed; anti-discharge method: intercepting ditch, river retaining bank River diversion, shaft dewatering, gravity/concentrated drainage.
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