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Evaluation of a mine panel failure using the local mine stiffness criterion - a case study.

Authors
Morsy-K; Peng-SS
Source
Trans Soc Min Metal Explor 2003 Jan; 312:8-19
NIOSHTIC No.
20024628
Abstract
A new method of pillar stability evaluation was proposed. The unique feature about the method is that it estimates two types of stability factors for the pillar. The first stability factor is to measure how much the applied stress at that point is smaller than its strength, and the second stability factor is to predict whether or not the pillar will fail violently. The strain-softening behavior of coal pillars was simulated by the Drucker-Prager yield criterion. A new algorithm that simulates the strain-hardening behavior of the gob was used. A numerical technique to estimate the local mine stiffness (LMS) was introduced and verified by both numerical and analytical methods. A case of massive pillar failure in a room-and-pillar mine was used to define the stability limits for the proposed method.
Keywords
Coal-mining; Mining-industry; Occupational-hazards; Engineering-controls; Engineering; Models; Case-studies; Rock-bursts; Rock-falls; Rock-mechanics; Geology; Ground-control; Ground-stability
CODEN
TMENAE
Publication Date
20030101
Document Type
Journal Article
Editors
Yernberg-WR
Funding Amount
328500
Funding Type
Grant
Fiscal Year
2003
NTIS Accession No.
NTIS Price
ISBN No.
1873352297
Identifying No.
Grant-Number-R01-OH-004238
ISSN
1075-8623
Source Name
Transactions of the Society for Mining, Metallurgy, and Exploration
State
WV
Performing Organization
West Virginia University Research Corporation, Morgantown, West Virginia
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