Research Article
An Improved Method for Estimating the Strength of Jointed Rock Mass Using Drilling Technology
Table 3
Empirical relations from the classification systems of RQD, RMR, Q, and GSI for determining unconfined compressive strength.
| | Authors | Relation | Equation |
| | Yudhbir and Prinzl [26] | | (4) | | Ramamurthy et al. and Ramamurthy [43, 44] | | (5) | | Trueman [46]; Asef et al. [63] | | (6) | | Kalamaras and Bieniawski [40] | | (7) | | Hoek et al. [42] | | (8) | | Bhasin and Grimstad [45]; Singh and Goel [47] | | (9) | | Sheory [28] | | (10) | | Aydan and Dalgic [29] | | (11) | | Barton [30] | | (12) | | Hoek [33] | | (13) | | Singh et al. [41] | | (14) | | Zhang [24] | | (15) |
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