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Mine design and ground control.

Authors
Moebs-NN
Source
World Min Equip 1985 Jan; 9(1):10-13
NIOSHTIC No.
10007083
Abstract
There are a number of reasons for mine roof failure. The cause of some roof falls is obscure and attributed to poorly understood stress concentrations surrounding the mine openings; these falls occur most commonly when mine entries are located beneath stream valleys and topographic relief is 60 m or more. Some falls result from poor roof-bolting techniques or improper installation of bolts. However, most roof falls associated with the geologic hazards referred to in this U.S. Bureau of Mines paper occur because unusual geologic structures are not recognized or anticipated and adequate support is not provided. Identification of structures will require either the services of a geologist with underground experience or the training of miners (especially mining machine and roof-bolting machine operators) and their supervisors. Through regular examination of mine roof structures and conditions and the recording of this information systematically on the operating maps, and through some trial and error, it should become possible to determine the trends of hazardous structures so that mine entry projections can be revised or potentially troublesome zones anticipated, roof support practices upgraded, and roof falls reduced. The task will not be easy because of the complex character of many geologic features, but in consideration of both the high priority of accident prevention and the immense financial investment at stake in developing a mine, the attempt to identify and properly support roof structures should become an integral part of every underground operation. The applica
Publication Date
19850101
Document Type
OP; Journal Article
Fiscal Year
1985
NTIS Accession No.
NTIS Price
Identifying No.
OP 137-89
Issue of Publication
1
ISSN
0746-729X
NIOSH Division
PRC
Source Name
World Mining Equipment
State
PA
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