Method for assessment of rock drillability incorporating the Protodyakonov index

摘要

The study reported below was undertaken with three main objectives: (1) to develop a method for routine characterization of rock strength and drillability through the particle-size distribution of crushed or drilled rock products, defined by the Protodyakonov index; (2) to establish correlations between the Protodyakonov index, uniformity coefficient and the constant grading equations; and (3) to propose an alternative rock characterization index to classify, for the northeast region of Algeria, rock strength and drillability.