Question

Which of the following parameter(s) is/are Rock Mass Rating (RMR) based on?

• A. Rock Quality Designation
• B. Uniaxial compressive strength of intact rock
• C. Groundwater conditions
• D. Rock composition

Hint:

The Rock Mass Rating (RMR) is based on rock quality designation, uniaxial compressive strength of intact rock, and groundwater conditions, which are critical in assessing the stability of a rock mass.

Answer 1

The Correct Option is A, B, C

Rock Mass Rating (RMR) is a system used to classify the quality of rock masses based on several parameters. The key factors influencing the RMR are:
- Rock Quality Designation (RQD): This is a measure of the degree of jointing in the rock and is a critical factor in determining the rock mass quality.
- Uniaxial compressive strength of intact rock: This is an important parameter that indicates the strength of the intact rock, which is essential for understanding its stability.
- Groundwater conditions: The presence of groundwater affects the rock mass stability, and thus this parameter is included in the RMR calculation.
- Rock composition: While rock composition can influence rock mass properties, it is not directly included in the RMR system.
Thus, the correct answer is (A), (B), and (C).