Chambering and block caving are mining methods used in mining which feature?

Chambering and block caving are mining methods used in mining which feature?

• A. Open-pit mining
• B. Chambering and block caving are methods used in mining diamond pipes
• C. Undersea mining
• D. Marine dredging

Answer: (B)

Chambering and block caving are bulk underground extraction methods suited to large, relatively soft or fractured ore bodies that extend as vertical conduits, such as diamond pipes (kimberlites). In chambering, large openings or chambers are carved within the ore body to access the diamonds while pillars are left to support the roof; ore is removed in stages and the surrounding rock is allowed to span between openings, helping maintain stability as mining progresses. Block caving relies on gravity: the rock above the mined level is undercut so the overlying material collapses in a controlled sequence, allowing huge amounts of ore to be drawn from below as the cave front advances. This approach is efficient for the geometry and rock conditions found in diamond pipes, enabling high-tonnage, low-cost production. Open-pit mining is used for shallow, near-surface deposits, which diamond pipes typically are not. Undersea mining and marine dredging target different environments and resources, not inland vertical kimberlite pipes.

Chambering and block caving are bulk underground extraction methods suited to large, relatively soft or fractured ore bodies that extend as vertical conduits, such as diamond pipes (kimberlites). In chambering, large openings or chambers are carved within the ore body to access the diamonds while pillars are left to support the roof; ore is removed in stages and the surrounding rock is allowed to span between openings, helping maintain stability as mining progresses. Block caving relies on gravity: the rock above the mined level is undercut so the overlying material collapses in a controlled sequence, allowing huge amounts of ore to be drawn from below as the cave front advances. This approach is efficient for the geometry and rock conditions found in diamond pipes, enabling high-tonnage, low-cost production.

Open-pit mining is used for shallow, near-surface deposits, which diamond pipes typically are not. Undersea mining and marine dredging target different environments and resources, not inland vertical kimberlite pipes.