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The wooden pillars are convenient to take, and can be processed and erected on the working surface according to the actual situation, and the operation is convenient. When supporting with wooden pillars, the empty top distance of the stope is generally not greater than !" , when it exceeds this height, it is difficult to erect.
In order to save as much wood as possible, friction metal pillars have been used more in stope support.
Friction metal pillars have many similarities with wood pillars. They have the same effect in stope support. Wherever wood pillars can be used, friction metal pillars can be used, but they should be avoided in places where acid water corrosion occurs. In addition, the metal struts are not retractable, and the retractability can be achieved by placing a wooden cap on the top of the column. The friction metal pillars are more expensive, but can be reused many times. The listed friction metal pillars can be used for various support heights.
When the pressure on the mine is high, the wooden pillars (or metal pillars with wooden caps) can be used to monitor the pressure changes in the stope, providing the simplest monitoring signals for mining operators.
Most of the wooden pillars or metal pillars can be recycled and reused.
Single column support and support method
Unit support can be used when the roof of the stope is partially unstable or the individual blocks are likely to fall. Single column may also be the case for the wooden struts gold.