10 Questions
What is an open stope in underground mining?
An open stope is an underground cavity from which the initial ore has been mined, and caving of the opening is prevented by support from unmined ore or waste left in the form of pillars and stope walls.
What is the primary support system of open stoping?
The primary support system of open stoping is pillars formed by unmined ore or waste.
What are some examples of secondary support in open stoping?
Some examples of secondary support in open stoping include rockbolts, reinforcing rods, split pipes, shotcrete, timber posts, and hydraulic props.
What is the necessity for open-stope mining?
The necessity for open-stope mining is that the mineral and the wall rocks must be competent.
What factors primarily determine the type of open stope mining?
The type of open stope mining is primarily determined by the dip and the thickness of the reserve.
What is the primary purpose of pillars in open stoping?
The primary purpose of pillars in open stoping is to provide support to prevent caving of the opening.
What are some examples of secondary support that may be required in open stoping?
Examples of secondary support in open stoping may include rockbolts, reinforcing rods, split pipes shotcrete, timber posts, and hydraulic props.
How is the type of open stope mining primarily determined?
The type of open stope mining is primarily determined by the dip and the thickness of the reserve.
What is a potential disadvantage of the room and pillar mining method?
A potential disadvantage of the room and pillar mining method is that roof support and maintenance of openings can become costly in case of weak ore or roof.
What are the key requirements for open-stope mining to be necessary?
The mineral and the wall rocks, especially the hanging wall, must be competent for open-stope mining to be necessary.
Test your knowledge of underground mining with this quiz on naturally supported stopes and open stoping. Explore the primary support system, pillars, and stope walls in this chapter of MINE 201.
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