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Wallrock Reactions to Mining Beyond a Preconditioned Zone At the Star Mine, Burke, Idaho.

Authors
Blake-W
Source
NTIS: PB/81-214355 :45 pages
Link
NIOSHTIC No.
10002134
Abstract
Rock preconditioning in advance of mining has been an effective means of rock-burst control based on the results of field demonstrations carried out on the 7700 level of the Hecla Mining Company's Star Mine. Mining through the preconditioned zone was characterized by greatly reduced rates of released seismic energy and no bumping or rock bursting occurred within the preconditioned zone. Mining above the preconditioned zone was characterized by greatly increased rates of released seismic energy and rock bursting, particularly where the vein became very narrow in waste zones. This increased incidence of rock bursting points out the need for stope preconditioning to be carried out on an entire stope block basis.
Publication Date
19800101
Document Type
CP; Final Contract Report;
Fiscal Year
1980
NTIS Accession No.
PB81-214355
NTIS Price
A04
Identifying No.
OFR 52-81
NIOSH Division
SRC;
Source Name
NTIS: PB/81-214355
State
ID;
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