Test Method Title
Drillability Test Suite
Reference Number
NTNUs 13A-98 Drillability Test Methods & SINTEFs Standards
Material
Rock
Test Property
Drilling Rate Index, Bit Wear Index, Cutter Life Index, Flakiness, Brittleness Value, Siever's J-Value, Abrasion Value, Abrasion Value Cutter Steel
Description of Test
The Drillability tests produce reliable predictions of TBM performance. The test method determines Drilling Rate Index, Bit Wear Index, Cutter Life Index. The indices are indirect measures for the drillability of rock in tunneling and rock excavations.
Number of Test Specimens
1
Test Specimen Size
15 - 20 kg preferred; minimum simple size 10kg of rock core
Keywords
Bit Wear Index, Cutter Life Index, Drillability, Drilling Rate Index, NTNU