Drill penetration rates in rock
Drilling Penetration Rate Estimation using Rock Drillability Characterization Index
Thuro, Prediction and classification tool wear in drill and blast tunnelling. The summaries of the test results are given in Table I.
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Berdt, Correlation of model tunnel boring and drilling machine performance with rock properties. The DRI value is strongly related to the uniaxial compressive strength and indirect tensile strength.
Description: Market penetration policy. Cable vs dsl penetration.