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Coal Mine Roof Instability: Categories and Causes.

Authors
Moebs-NN; Stateham-RM
Source
MISSING :15 pages
Link
NIOSHTIC No.
10005080
Abstract
Coal mine roof failure is categorized according to character, trend, or pattern of occurrence. Two principal categories of failure are proposed--geology related and stress related. Geology-related failure includes both lithology and structure. Each of several subcategories reflects the probable cause of failure and thereby provides a basis for the selection of appropriate techniques for reducing the incidence of failure. These control techniques, depending on local conditions, may include supplementary support, destressing, reduction of mine air humidity, or a change in the customary support methods.
Publication Date
19860101
Document Type
IH; Information Circular;
Fiscal Year
1986
NTIS Accession No.
NTIS Price
Identifying No.
IC 9076
NIOSH Division
PRC;
Source Name
MISSING
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