Joint development of Cleveland tin mine in Australia

The mine is a sulfide deposit with a length of 367m, an average thickness of 7.6m and a dip angle of 80°~90°. The average grade of ore tin is 0.92%, the average grade of copper is 0.4%. The surrounding rock and ore of the upper and lower plates are very stable.
The mine is jointly developed by Pingshuo-slope road. It is developed by Pingyi-slip well above 1125m level. The main flat raft is set at 1125m level, and the main flat section is 4.2×4.2m. Blind ramps are used below the 1125m level. Both the ore and the waste rock are transported to the main level by the truck in the pit, and then the surface is transported from the main flat. The section of the blind slope is 4.8×4.8 m, and the section of the curve section is 5.5×4.8 m 2 . The blind ramp has a radius of curvature of 16.7 m. The blind slope road surface is paved with fine gravel, heavy medium framed tailings and a small amount of clay . The slope of the blind slope was 11.1% between the 7th and 9th. Increased to 14.3% below subparagraph 9. To reduce the length of the blind ramp.
The annual mine production capacity of the mine is 250,000 tons.
The Cleveland tin mine development system is shown in Figure 1. The arrangement of the foldback ramp is shown in Figure 2.




Figure 1 Cleveland Mine Development System

1- old open pit; 2 - security pillar; 3-1125m main flat;
4-main chute; 5-blind ramp; 6-segment roadway; 7-mine body




Figure 2 Cleveland Mine Foldback Slope Arrangement

1-blind ramp; 2-stone gate

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