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Drilling Machines, Underground.

Authors
Unger-HF
Source
Subsection 11 6 in SME Min Engr Handbook 1973 1:11-60to11-78
Link
NIOSHTIC No.
10001760
Abstract
This description of underground drilling methods covers percussive, rotary, and rotary-percussive techniques. Topics specifically treated are types of drills, power sources, drill rods, types of bits, circulation or flushing systems, operating and performance specifications, and unit costs.
Publication Date
19730101
Document Type
OP;
Fiscal Year
1973
NTIS Accession No.
NTIS Price
Identifying No.
OP 26-74
NIOSH Division
TCRC;
Source Name
Subsection 11.6 in SME Min. Engr. Handbook, V. 1, 1973, PP. 11-60 to 11-78
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