Comparison of Rockmass Properties Calculator with Roclab

Rock Mass Properties Calculator is a specialized software designed to calculate rock mass strength parameters using the latest generalized Hoek–Brown failure criterion. It offers a straightforward and user-friendly approach, enabling users to accurately estimate rock mass properties and visualize how variations in these parameters influence failure envelopes.

We will compare the results generated by our calculator with those from RocLab to assess its accuracy and functionality.

See in the below the example in Figure 1 from Roclab which we will use for comparison.

Data Input/Output: Hoek-Brown Input and Output Parameters

Input Parameters

Using the following Hoek-Brown failure criteria parameters as input:

• the unconfined compressive strength of intact rock
• the geological strength index GSI
• the intact rock parameter mi and
• the disturbance factor D

Now we will use the same input values in RMP calculator, used in Roclab to see the results.

After incorporating all the input parameters, we need to click CALCULATE HOEK-BROWN PARAMETERS to get the results.

Output Parameters

Display Capabilities: Instantaneous MC Sampler

The Instantaneous Mohr–Coulomb Sampler feature enables users to visually extract cohesion and friction angle values at any point along the Hoek–Brown failure envelope.

Batch Calculator

Batch Calculator works on the same principle as in the Single Calculator. Batch Calculator includes many sections along the tunnel alignment. Right now, you can add up to 50 rows. If you need more rows, please let us know.

All Reference Charts

You will get below Educational Resources

References

1. Hoek-Brown failure criterion – 2002 Edition E. Hoek, C. Carranza-Torres and B. Corkum Proc. NARMS-TAC Conference, Toronto, 2002, 1, 267-273.
2. Hoek E. (2002). Practical Rock Engineering. London: Institution of Mining and Metallurgy. pp. 325.
3. Hoek E. and Brown E.T. (1980). "Empirical strength criterion for rock masses". J. Geotechnical Engineering Division ASCE: 1013–1025.
4. Hoek, E. and Brown (1988). "The Hoek-Brown failure criterion - a 1988 update". Proc. 15th Canadian Rock Mech. Symp.: 31-38. Hoek E, Carranza-Torres CT, Corkum B (2002). "Hoek-Brown failure criterion-2002 edition". Proceedings of the fifth North American rock mechanics symposium vol. 1: 267–273.