R.M.R stands for
A. Rate of Marginal Return
B. Rockmass rating
C. Rating of Massive Roof
D. Rated mass of Rock
Answer: Option B
Solution(By Examveda Team)
The term R.M.R stands for Rockmass rating.Rockmass rating (RMR) is a widely used system for geomechanical classification of rocks in underground and surface mining. It is a numerical rating system that assesses the rock mass quality based on several parameters such as uniaxial compressive strength, rock quality designation, spacing of joints, groundwater conditions, and other factors.
The RMR value ranges from 0 to 100 and is used to classify rock mass into five categories, ranging from very poor to excellent. The RMR system is an essential tool for predicting the stability of underground openings and designing support systems to ensure the safety of workers and equipment.
Option A, rate of marginal return, option C, rating of massive roof, and option D, rated mass of rock, are not related to the geomechanical classification of rocks and the RMR system used in mining.
Therefore, the correct answer is option B, rockmass rating.
This Question Belongs to Mining Engineering >> Opencast Mining
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