Rock Mass Rating Calculator (RMR89)

Classify rock mass quality and estimate rock mass properties using Bieniawski's Rock Mass Rating (RMR89) system with six classification parameters for tunnelling and mining.

2D stress state at a point. All stresses in MPa.

σx — Normal Stress X (MPa)
σy — Normal Stress Y (MPa)
τxy — Shear Stress (MPa)
⚙ Mechanical Note: Results are based on standard textbook formulas and ISO/AASHTO references. Always verify critical designs with applicable codes (ISO 898, AASHTO 1993, AISC, Eurocode 3) and a qualified engineer.
Advertisement

How It Works

Classify rock mass quality and estimate rock mass properties using Bieniawski's Rock Mass Rating (RMR89) system with six classification parameters for tunnelling and mining

Each component has a specific meaning:

  • Bieniawski's Rock Mass Rating system — The bieniawski's rock mass rating system recorded for the patient or scenario being assessed.

Note: Interpret the rock mass rating rmr result against the clinical thresholds and context described above.

How to Use

Enter the Bieniawski's Rock Mass Rating system for the patient or scenario you are assessing. Classify rock mass quality and estimate rock mass properties using Bieniawski's Rock Mass Rating (RMR89) system with six classification parameters for tunnelling and mining. Use the rock mass rating rmr result to inform your clinical assessment.

Related Calculators

Q-System Rock Quality

Engineering

Geological Strength Index

Engineering

Tunnel Crown Stability

Engineering

Frequently Asked Questions