Drill penetration rates in rock

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An exploration core driller’s success depends on the productivity and presentation of their drilling equipment. With today’s contractors facing heightened pressure to increase productivity and reduce costs, choosing the right adamant coring bit for the job has never been so important. Improper bit selection can angle to productivity loss, poor core recovery, hole problems and spare wear and revel on rigs, rods and downhole tools.

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Dominant rock properties affecting the penetration rate of percussive drills - ScienceDirect

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Percussive blast hole drills were observed in eight rock types at an open pit reenforce and threesome motorway sites. The net penetration rates of the drills were calculated from the operation measurements. Rock samples were collected from the drilling locations and the physical and mechanical properties of the rocks were determined both in the field and in the laboratory.

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A stochastic penetration rate model for rotary drilling in surface mines - ScienceDirect

Principal Component Analysis (PCA) is used to make the most effective parameters on the rock mass penetrability by considering their variance ratio in the first-year school principal component. A model is developed for the logical thinking of rotary converter drills penetration rate using non-linear multiple regression analysis. Distribution functions for the rough-and-ready parameters are measured using measured data from two case studies.

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