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Principles of Drilling.
Subsection 11 3 in SME Mining Engineering Handbook 1:11-5to11-24
The principles of drilling are concerned with the energetics of rock penetration through use of mechanical energy, the functional responses, and the interrelationships between the drill system and rocks. The subjects discussed include strength characteristics of rock, mechanics of penetration, major factors influencing penetration rate, engineering properties related to drillability, and drillability determination.
Subsection 11.3 in SME Mining Engineering Handbook, Vol. 1, PP. 11-5 to 11-24