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Figure 1 Horizontal deep hole falling mine with bottom column sublevel caving mining method
1-The lower plate transports the roadway along the vein; 2-passages the roadway; 3-on the plate transports the roadway along the vein;
4-Pedestrian, ventilated patio; 5--minening chute; 6-electric power tunnel; 7-compensation space;
8-temporary pillar; 9-rock drilling patio; 10-contact tunnel; 11-rock drilling chamber; 12-deep hole;
Figure 2 Vertical deep hole falling mine with bottom column section caving mining method
1- bottom structure; 2-electric roadway; 3-bucket; 4-bottle neck; 5-ditch;
6- return airway; 7-cut roadway; 8-cut patio; 9-slot blasthole;
10-ditch blasting blasthole; 11-section rock drilling roadway; 12-side extrusion blasthole;
13-falling waste rock; 14-falling ore; 15-surrounding rock; 16-mineral body
The sub-column sublevel caving mining method divides the ore into sections; each section is provided with a bottom column and a dedicated mining roadway and rock drilling roadway, which are mined from the top to the bottom, with deep holes or deep holes. Falling mines, ore deposits under the cover of surrounding rock.
The sublevel caving method with bottom column can be divided into:
(1) The horizontal deep hole falling mine has a sub-column sublevel caving method (as shown in Figure 1).
The scheme needs to excavate the compensation space in the lower part of the sublevel caving layer to perform free space blasting or space blasting. Due to the large damage to the stability of the bottom column of the ore block, the blasthole is easily deformed, etc., this scheme is not used much now.
(2) Vertical deep hole falling mine has a sub-column sublevel caving method (as shown in Figure 2).
This is a mining plan that drills vertical deep holes and applies extrusion blasting. This program is used more.