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Ground Conditions That Can Shut Down a Longwall--how They Can Be Predicted, Avoided, and Controlled.

Authors
Mark-C
Source
Longwall USA PP 119-134 :119-134
Link
NIOSHTIC No.
10008584
Abstract
Ground control failures continue to create safety hazards on many U.S. longwalls, often resulting in expensive downtime. In the course of a recent series of geotechnical surveys, the U.S. Bureau of Mines identified a number of geologic structures and conditions that contribute to ground control failures during longwall mining. This paper describes those structures and conditions, their effects, and the coal basins in which they can be expected to cause the most problems. Based on the experiences reported by the surveyed mines, suggestions are given for predicting when these features might occur, and how they might be avoided or controlled.
Publication Date
19900101
Document Type
OP;
Fiscal Year
1990
NTIS Accession No.
NTIS Price
Identifying No.
OP 48-91
NIOSH Division
PRC;
Source Name
Longwall, USA, PP. 119-134
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