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Trapped miner location and communication system development program - 4 volume set. Volume 2 - detection and location of entrapped miners by seismic means, methods, and computer programs.

Authors
Duda-SJ
Source
NTIS: PB/235-606 Available for Reference At Bureau Libraries :1-64
Link
NIOSHTIC No.
10001497
Abstract
This report (Contract No. H0220073) presents the adaptation of procedures for detecting and locating seismic sources to the case of entrapped miners. During an emergency, the entrapped miner is likely to generate seismic signals by knocking against the walls of the shaft. With a seismic array station deployed near the disaster area, the seismic signals can be recorded. Two algorithms are presented for the location of the source from the arrival time of a seismic phase. The first algorithm produces one most probable location under the assumption of constant velocity of propagation of seismic waves in the medium. The second algorithm is similarly applicable, however, without any restriction on the seismic velocities in the medium between the source and the array. The first algorithm uses an analytic approach; the second one is based on a trial and error procedure. The second algorithm gives locations with arbitrarily high accuracies, depending only on the accuracy of arrival time measurements and on the compatibility of the true velocity distribution and the assumed velocity model.
Publication Date
19730101
Document Type
CP; Final Contract Report
Funding Type
Contract
Fiscal Year
1973
NTIS Accession No.
PB-235606
NTIS Price
A05
Identifying No.
OFR 41(2)-74; Contract-H0220073
NIOSH Division
PRC
Source Name
NTIS: PB/235-606; Available for Reference At Bureau Libraries
State
PA
Performing Organization
Westinghouse Electric Corp.
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