Chejiang Copper Mine Comprehensive Mining Method
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The ore blocks are arranged along the strike, 30m long and 50m long, without leaving the top column and the bottom column, and no column, as shown in Figure 1. Stage haulage tunnel located on the bottom slate stone. On the side of the transportation roadway, the ore-draining well is excavated in the center of the ore block, and the chute is 4~8m high. On the other side of the roadway, the pedestrian patio is digging and connected with the contact road. The contact road is dig along the strike in the ore body, it puts each Pedestrian patios, electric winch winches, and mines are connected. In the center of the nugget, cut the mountain and the return air passage. The mining of the ore block is centered on the cutting hill, and it is inclined from the top to the bottom, forming a fan-like working surface on both sides, and rocking with a YT-25 or YT-30 rock drill. The ore is transported with 2DPJ-28 or 30kw electric pick. During the mining process, the roof is maintained with anchors and waste rafts. After the mining, the goaf is filled with full tailings to control the ground pressure activities and protect the surface from damage.
Figure 1 Chejiang Copper Mine Comprehensive Mining Method
1-stage transportation roadway; 2-Pedestrian patio; 3-minening chute; 4-contact roadway;
5-cut uphill; 6-electric winch; 7-rock column; 8-bolt; 9-tail sand filling