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Stress Distribution and Pillar Design in Oil Shale Retorts.

Authors
Peng-SS; Thill-RE
Source
MISSING :33 pages
Link
NIOSHTIC No.
10002235
Abstract
The design of retort interchamber pillars is important in determining surface stability over in situ retort mines and to the health and safety of miners, particularly with respect to possible escape of heat and toxic gases from retort chambers. Stress distribution in retort interchamber pillars, roof, and floor was examined with the aid of linear, finite-element analysis using data from experimentally determined mechanical properties. Properties determined included elastic moduli, strength, and creep constants in laboratory tests on core covering a 100-foot depth interval in the oil shale from the Piceance Basin in Colorado. The most critical stress concentration was found in the rib side of the interchamber pillar at a height above the floor line of 1.25 Times the width. Guidelines for pillar design that consider pillar strength, creep, and retorting temperature effects are proposed.
Publication Date
19820101
Document Type
IH; Report of Investigations
Fiscal Year
1982
NTIS Accession No.
NTIS Price
Identifying No.
RI 8597
NIOSH Division
TCRC;
Source Name
MISSING
State
CO;
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