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Design and Fabrication of Instrumentation for Remote Sealing of Underground Coal Mine Passageways.

Authors
Monaghan-DA; Berry-DR; Brunelle-BC
Source
NTIS: PB 295-292 :78 pages
Link
NIOSHTIC No.
10000558
Abstract
This report describes instrumentation that is part of a system for extinguishing mine fires by pumping material through surface boreholes to seal off all underground passageways leading to the fire area. Major instrumentation systems include a closed-circuit television (cctv) probing system and an acoustic seal checking system. The latter consists of a speaker probe, a receiver probe, and related signal processing equipment. All probes can be winch- deployed down a 6-inch-diameter borehole. The cctv unit can be rotated 360 deg in the horizontal plane, and contains sufficient lighting to reliably assay conditions for sealing or rescue within a 200-foot radius. The acoustic seal checker monitors the completion of a seal as it progresses by use probes lowered through boreholes on either side of the seal.
Publication Date
19770101
Document Type
CP; Final Contract Report;
Fiscal Year
1977
NTIS Accession No.
PB-295292
NTIS Price
A06
Identifying No.
OFR 48-79
NIOSH Division
PRC;
Source Name
NTIS: PB 295-292
Performing Organization
Foster-Miller Associates, Inc.
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