Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Preliminary Design of an Automated Drill and Blast Machine.

Authors
Wetherell-RB; Crane-CJ; Porter-WB
Source
NTIS: PB/252-829 Available for Reference At Bureau Libraries :46 pages
Link
NIOSHTIC No.
10001704
Abstract
This report presents the results of a preliminary design concept for an automated drill and blast machine (adbm). The design concept was the first phase of a four-phase program and was based on hercules' experience with explosives for conventional drill/blast/muck (dbm) tunneling and robbins' experience as a tunneling boring-machine (tbm) manufacturer. The overall objective of the study was to design a machine that could combine dmb operations into a single automated machine capable of remaining at the tunnel face during all operations. Currently produced tbm's have proven capable of penetrating rock of any hardness. However, these machines are not economical in hard or abrasive rock formations. All objectives of this first phase were not achieved. The major problem was the time required for currently used mucking equipment to clear the face. The anticipated improvement in advance rate of the adbm over currently used tbm's cannot be achieved until the muck cycle can be reduced to 20 minutes per round.
Publication Date
19760101
Document Type
CP; Final Contract Report;
Fiscal Year
1976
NTIS Accession No.
PB-252829
NTIS Price
A04
Identifying No.
OFR 62-76
NIOSH Division
TCRC;
Source Name
NTIS: PB/252-829 Available for Reference At Bureau Libraries
Performing Organization
Hercules, Inc., & Robbins Company
TOP