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Bieniawski Rock Mass Rating (RMR) Geomechanics Classification Calculator

Easily calculate and compute bieniawski rock mass rating (rmr) geomechanics classification calculator with accurate equations, live formulas, and expert guidance.

UCS > 100 MPa or Point Load > 4 MPa = 12 pts.

RQD 90-100% = 20 pts; 75-90% = 17 pts.

Spacing 0.6 - 2.0 m = 15 pts.

Completely dry = 15; Damp = 10; Wet = 7; Dripping = 4.

Calculated Result
74 points

Total Rock Mass Rating (RMR)

Total Rock Mass Rating (RMR)

74 points

Total Rmr Score

74

Bieniawski Rock Class

Class II: Good Rock (Stand-up time: 1 yr for 10m span)

Equivalent Cohesion

300 - 400 kPa

Friction Angle

35° - 45°

74 — points

Calculation Breakdown

  1. Applied FormulaClassifies rock mass structural competence according to Bieniawski's Geomechanics System to design tunnel shoring and rock slope stabilization.\text{RMR} = \sum_{i=1}^5 R_i

Rock Mass Rating (RMR) Metric Output

Interactive visualization based on your current inputs

Calculated Value
0.019375674Total Rock Mass Rating (RMR)

What Is the Bieniawski Rock Mass Rating (RMR) Geomechanics Classification Calculator?

This tool computes bieniawski rock mass rating (rmr) geomechanics classification calculator with high precision arithmetic.

How Does the Bieniawski Rock Mass Rating (RMR) Geomechanics Classification Calculator Work?

Classifies rock mass structural competence according to Bieniawski's Geomechanics System to design tunnel shoring and rock slope stabilization.

Bieniawski Rock Mass Rating (RMR) Geomechanics Classification Calculator Formula & Variables

The core mathematical equation utilized by this calculator is expressed as:

RMR=∑i=15Ri\text{RMR} = \sum_{i=1}^5 R_i

Classifies rock mass structural competence according to Bieniawski's Geomechanics System to design tunnel shoring and rock slope stabilization.

How to Use the Bieniawski Rock Mass Rating (RMR) Geomechanics Classification Calculator

  1. Enter your parameters into the designated input fields to calculate the result immediately.

Step-by-Step Example Calculation

Bieniawski Rock Mass Rating (RMR) Geomechanics Classification Calculator Example

Input Values:

uniaxialCompressiveStrengthRating:12
rqdRating:17
jointSpacingRating:15
jointConditionRating:20
groundwaterConditionRating:10
Worked Steps: Sample evaluation based on standard reference conditions.

Understanding Your Result

The calculated primary figure indicates the optimal or required points.

Factors That Affect the Result

  • Measurement tolerances, operational variance, and real-world conditions.

When Should You Use This Calculator?

  • Everyday budgeting, technical homework, professional estimation, and household projects.

Assumptions & Limitations

  • Assumes standard atmospheric or environmental parameters unless specified.

Frequently Asked Questions

Calculation Accuracy & Reference Note

Double-precision IEEE 754 arithmetic with validated empirical constants.

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