What is the Laubscher Mining Rock Mass Rating system?

The Mining Rock Mass Rating system is a geomechanics classification method developed by DH Laubscher by modifying Bieniawski's Rock Mass Rating system. It determines rock stability and support requirements by calculating an initial rating based on intact rock strength, quality designation, spacing, and condition, which is then adjusted using specific environmental and stress factors. The resulting values help engineers evaluate reinforcement potential and compensate for excavation effects and weathering.

What we know

• DH Laubscher developed the Mining Rock Mass Rating system by modifying Z. T. Bieniawski's Rock Mass Rating system, though some parameter definitions and details differ between the two classification schemes. [1, 2]
• The initial rock mass rating is calculated using intact rock strength, rock quality designation, discontinuity spacing, and discontinuity condition. [2]
• Adjustment factors are applied to the initial rating to compensate for excavation methods, orientation of discontinuities, induced stresses, and future weathering. [2]
• The combination of the unadjusted rating and the adjusted rating determines the reinforcement potential of the rock mass. [2]

Where to go next

• compared withHow does Bieniawski's Rock Mass Rating system work?
• how it workedWhat is a discontinuity in geotechnical engineering?
• the bigger pictureHow are rock mass classification systems used in tunnel design?
• whoWho was DH Laubscher in geotechnical engineering?
• an unexpected connectionWhat is the sliding criterion for rock slopes?

Sources

• [1]Mining rock mass rating (Wikidata Q6865634) · CC0 1.0
• [2]Mining rock mass rating · CC BY-SA 4.0
• [3]Discontinuity (geotechnical engineering) · CC BY-SA 4.0
• [4]Sliding criterion (geotechnical engineering) · CC BY-SA 4.0
• [5]Rock mass classification · CC BY-SA 4.0

Your path

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