# 4 BEIFANG copper mine ore body in red sandstone on the disc, the disc is a contact zone between the crushing limestone, weathering deeper level, rock ore poor stability, lenticular orebody, surface farmland, No fall is allowed.
The 4 # ore body adopts the downward inclined layered filling method (see Figure 1), and two stope are arranged along the strike. The stope is 53m long, 16m wide and 30m high, with a layer height of 2.5~3m and a layered dip angle of 14°.
Figure 1 Lower stratified filling method of Baifang Copper Mine
1-filling well; 2-ventilated pedestrian patio; 3-filler;
4-filling roadway; 5--recovery approach; 6-running mine
In the middle of the stope, there are sliding mines and external ventilation wells. In the upper stage, there are filling ramps at the lower and the ends of the stope. The ore-boring well is watered by concrete. The approach is arranged along the direction of the ore body and is 3.5 to 4 m wide. Rock drilling with a gas-legged rock drill, 7.5kw electric antimony ore. Local fan ventilation. After the mining, use ф16 steel bar, 400×400mm mesh to spread into the layered roadway and the approach road 4m, and then fill the wall with the wood retaining wall. The filling material is cement: river sand: gravel, ratio 1:3:6; strength Not less than 5 MPa.professional manufacturer green cook Gas stove,gas stove 3 burner stainless steel,3 burner gas stove glass top,three burner gas stove,gas stove 3 burner stainless steel,stoves gas
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