Abstract
For the design of rock engineering projects, rock mass parameters are usually determined by the use of classification systems (Q, GSI, RMR, etc.). A homogeneous rock mass with reduced parameters via empirical relationships is generated, and the influence of the anisotropy is lost during the process. The influence of discrete discontinuities on the global rock mass stiffness is investigated in this feasibility study and the results compared to empirical solutions based on the GSI. The results show that with one joint set oriented perpendicular to the direction of loading, the block volume is rather insignificant for the resulting E rm ; whereas the joint normal spacing parallel to the direction of loading and the block shape are the most influencing factors. In the cases, with the block volume and joint condition as input parameters, the E rm is significantly underestimated, while the E rm , based on RQD and JCond 89 still fits in the range of the numerical results. However, the numerical investigations are so far limited on an orthogonal oriented joint network under uniaxial compression and further investigations are necessary.
| Original language | English |
|---|---|
| Title of host publication | Geomechanics and Geodynamics of Rock Masses |
| Editors | Vladimir Litvinenko |
| Place of Publication | St. Petersburg |
| Publisher | CRC Press/Balkema |
| Pages | 227-234 |
| Number of pages | 8 |
| Volume | 1 |
| ISBN (Print) | 9781138616455 |
| Publication status | Published - 22 May 2018 |
| Event | 2018 ISRM European Rock Mechanics Symposium: EUROCK 2018 - Saint Petersburg, Russian Federation Duration: 22 May 2018 → 26 May 2018 |
Conference
| Conference | 2018 ISRM European Rock Mechanics Symposium |
|---|---|
| Country/Territory | Russian Federation |
| City | Saint Petersburg |
| Period | 22/05/18 → 26/05/18 |
Keywords
- 3DEC
- Block volume
- Jointed rock mass
- Young’s modulus
ASJC Scopus subject areas
- Geochemistry and Petrology