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Subsidence Over Four Room-and-pillar Sections in Southwestern Pennsylvania.

Authors
Moebs-NN
Source
MISSING :23 pages
Link
NIOSHTIC No.
10002317
Abstract
The Bureau of Mines measured surface subsidence above four small coal mine room-and-pillar sections in southwestern Pennsylvania to obtain preliminary information on the magnitude and character of selected parameters, such as angle of draw and maximum subsidence, which are essential to the development of subsidence prediction methods. Data varied widely at the four sites; this is attributed to local geologic and mining conditions. Surface deformation at each site was of a magnitude normally associated with severe structural damage.
Publication Date
19820101
Document Type
IH; Report of Investigations
Fiscal Year
1982
NTIS Accession No.
NTIS Price
Identifying No.
RI 8645
NIOSH Division
PRC;
Source Name
MISSING
State
PA;
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