The mine is a cassiterite multi-metal sulphide deposit. The ore body is layered, the inclination angle of No. 15 is below 35°, and the thickness of vein is 0.5~8m. Ore firm or medium firm, stone solid slate top and bottom, with a comprehensive mining law.
The ore blocks are arranged along the strike, with a length of 50~60m, a slope length of 40~50m, a stage height of 20m, a top column of 2~3m, no bottom column, and the use of planks to set up the mine shaft and form an artificial bottom column as shown in Fig. 1.
Figure 1 Barry Tin Mine Comprehensive Mining Method
1-stage transportation roadway; 2-cut uphill; 3-man-made funnel; 4-artificial bottom column; 5-top column;
6- irregular ore column; 7-safety exit; 8-electric chamber; 9-mineral; 10-blast hole
The stage transportation lane is arranged in the vein. Cut the mountain up on the side of the nugget. The mining roadway along the ore block is sloping upwards for 4~5m, and then every 5~7m along the transportation roadway, artificial ore-boring wells are set up with pits and planks, and colleagues form artificial bottom columns. Starting from cutting up the mountain, it will go along the forward or backward form to form the working face of the step. Use a hand-held rock drill to drill rock, fire tube fire tube detonation or non-conducting blast pipe to ignite and detonate. The electric raft is transported, and the electric winch is installed in the diverting chamber on the opposite side of the transport roadway. The roof is supported by irregular pillars.
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