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Coal mine bumps: five case studies in the eastern United States.

Authors
Campoli-AA; Kertis-CA; Goode-CA
Source
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, IC 9149, 1987 Jan; :1-34
NIOSHTIC No.
10006080
Abstract
This Bureau of Mines study was conducted to obtain a better understanding of the coal mine bump problem and its effect on underground coal mining in the eastern United States. To accomplish this, information was collected on the geologic conditions, mining techniques, and engineering parameters at five bump-prone mines. Two geologic conditions have been found to cause the occurrence of bumps in the eastern United States: (1) relatively thick overburden and (2) extremely rigid strata occurring immediately above and below the mine coalbed. Additionally, the probability of bump occurrence is increased by certain mining practices that concentrate stresses during retreat mining in areas where geologic conditions are conducive to bumps. Mining plans that permit the development of pillar line points or long roof spans that project over gob areas should be avoided because these features may contribute to the occurrence of bumps.
Keywords
Surface-mining; Surface-properties; Underground-mining; Mining-industry; Coal-mining; Structural-analysis; Room-and-pillar-mining; Injury-prevention; Injuries; Traumatic-injuries
Publication Date
19870101
Document Type
IH; Information Circular
Fiscal Year
1987
NTIS Accession No.
PB90-265505
NTIS Price
A03
Identifying No.
IC-9149
NIOSH Division
PRC
Source Name
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, IC 9149
State
PA
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