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An Abrasive-enhanced Water Jet Drill and Kerf Cutter for Hard Rock.

Authors
Savanick-GA
Source
Proc Conf on Shaft Drilling Tech Las Vegas 4-91 Inst Shaft Drilling Technol 1991 :12 pages
Link
NIOSHTIC No.
10009163
Abstract
The U.S. Bureau of Mines has patented an abrasive-enhanced waterjet rock drill. Drilling occurs through the action of a 10,000-psi, 20- gpm waterjet containing 20 lb/min of entrained abrasives. This 10,000-psi drill has drilled hard rock with an unconfined compressive strength of 73,000 psi. In addition to drilling holes in hard rock and reinforced concrete, this drill can cut deep, narrow kerfs in dimension stone, drill through rubble, and chamber holes.
Publication Date
19910101
Document Type
OP;
Fiscal Year
1991
NTIS Accession No.
NTIS Price
Identifying No.
OP 97-91
NIOSH Division
TCRC;
Source Name
Proc. Conf. on Shaft Drilling Tech., Las Vegas; 4-91, Inst. Shaft Drilling Technol, 1991, 12 Pp
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