Question

Identify the method of stoping preferred under the following conditions of the ore body
Type of Ore body - Thin
Dip - Flat
Strength of Ore - Strong
Strength of walls - Strong

• A. Sublevel stoping
• B. Sub level Caving
• C. Room and pillar
• D. Top slicing

Hint:

The combination of "flat dip" and "strong rock" is the classic indicator for the Room and Pillar method.
This method is used worldwide for mining coal, salt, potash, and limestone deposits that fit this description.

Answer 1

The Correct Option is C

Step 1: Understanding the Question:
We need to select the best mining method for an orebody that is thin, flat, and has strong ore and strong wall rocks.

Step 2: Detailed Explanation:
Let's analyze the conditions:
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Flat Dip, Thin Orebody: This describes a tabular, sheet-like deposit.
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Strong Ore and Strong Walls: This means the rock mass is very competent and can support itself over significant spans without collapsing.
Now let's evaluate the methods:
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Sublevel stoping, Sub level Caving, Top slicing: These methods are generally used for thick and/or steeply dipping orebodies. They are not suitable for thin, flat deposits.
-

Room and Pillar: This method is ideal for flat to gently dipping, tabular deposits.
It involves excavating "rooms" and leaving behind "pillars" of ore to support the roof.
The conditions of strong ore and strong walls are perfect for this method, as they allow for stable pillars and wide rooms to be created with minimal artificial support, leading to a safe and economical operation.

Step 3: Final Answer:
The preferred method for a thin, flat orebody with strong ore and walls is the Room and pillar method.
This corresponds to option (C).