From Triaxial Tests to Rock Mass Strength | RSData Tutorial

In this video, I show how to analyze triaxial test data and estimate strength parameters for both intact rock and rock mass using RSData from Rocscience (formerly RockData). This is a practical, step‑by‑step workflow commonly used in rock mechanics, slope stability, and tunnel design. We start with laboratory triaxial test results, calibrate a failure criterion, and then scale intact rock properties to rock mass properties using the Hoek–Brown approach, Geological Strength Index (GSI), and disturbance factor. 🔬 What you’ll learn in this video: 🔹 Part 1: Intact Rock Analysis Inputting triaxial test data (σ₁ and σ₃) Understanding principal stresses at failure Failure envelope visualization Calibration using Generalized Hoek–Brown criterion Estimation of: Unconfined Compressive Strength (UCS) Hoek–Brown constant mi Tensile strength of intact rock 🔹 Part 2: Applying Data to Rock Mass Difference between intact rock vs rock mass parameters Using Geological Strength Index (GSI) Selecting disturbance factor (D) for slopes Effects of excavation method and blasting quality Adjusting parameters for slope height and application Estimating: Rock mass UCS Tensile strength of rock mass Cohesion and friction angle Other rock mass strength parameters ⚠️ Key takeaway: Laboratory test results alone describe intact rock, but real engineering design requires converting these results into rock mass properties. RSData makes this process systematic, transparent, and engineering‑ready. 🎓 This video is ideal for: Civil, mining & geotechnical engineering students Rock mechanics and ground engineering courses Engineers using Rocscience software Anyone learning Hoek–Brown and GSI applications 👉 Watch till the end to see how rock mass strength can be dramatically lower than intact sample strength — and why this matters for real projects. 📌 Like, subscribe, and share for more practical rock mechanics and geotechnical engineering tutorials. #RockMechanics #TriaxialTest #HoekBrown #RSData #Rocscience #GeotechnicalEngineering #MiningEngineering #SlopeStability #civilengineering #geotechnicalengineering #engineeringgeology #rocscience Related video: Hoek-Brown Failure Criteria for Rock In Civil and Mining Engineering | Examples and Solutions    • Hoek-Brown Failure Criteria for Rock In Ci...   Using Mohr-Coulomb Failure Criteria for Rocks in Engineering | Triaxial Tests Data Analysis    • Using Mohr-Coulomb Failure Criteria for Ro...