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Prediction of Penetration Rate for Percussive Drilling.

Authors
Selim-AA; Bruce-WE
Source
NTIS: PB 192 303 :21 pages
Link
NIOSHTIC No.
10001741
Abstract
This report describes the feasibility of predicting percussive drilling rates by equations derived from statistical regression analysis. The least squares statistical method was used and the analysis was performed both by direct and by stepwise linear regression analysis. The predicted penetration rate is a function of the drill power and the physical properties of the rocks penetrated. The results show promise that the technique may be of value in providing a mathematical model by which percussive drill manufacturers and users can predict the performance of a given drill. Experimental work involved two mining-type percussive drills. Penetration data for these drills were determined from nine rocks drilled in the laboratory. Drill work rates (power) were determined in a separate series of experiments. Rock physical properties were measured from diamond-drill core samples taken from the same blocks used for percussive drilling.
Publication Date
19700101
Document Type
IH; Report of Investigations
Fiscal Year
1970
NTIS Accession No.
PB-192303
NTIS Price
A03
Identifying No.
RI 7396
NIOSH Division
TCRC;
Source Name
NTIS: PB 192 303
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