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A Demonstration of an Alternate Approach to Kelly Bar Loading.

Authors
Schmidt-MJ
Source
NTIS: PB 283 392 Available for Reference At Bureau Libraries :58 pages
Link
NIOSHTIC No.
10001702
Abstract
A program was conducted to determine the feasibility of providing a borehole liner for kelly bar drilled boreholes in southern Florida. The concept was to drill the borehole with the kelly bar and with it still in the borehole insert a tube that would remain in the unstable ground after withdrawal of the bar. The tube then will provide an unobstructed borehole for the charging of explosives upon completion of the drilling of the shot pattern.
Publication Date
19770101
Document Type
CP; Final Contract Report;
Fiscal Year
1977
NTIS Accession No.
PB-283392
NTIS Price
A05
Identifying No.
OFR 54-78
NIOSH Division
PRC;
Source Name
NTIS: PB 283 392 Available for Reference At Bureau Libraries
State
FL;
Performing Organization
Hercules, Inc.
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division