Numerical modeling of subsidence induced by underground coal gasification including thermal effects

Journal Article · Sat Jan 01 04:00:00 EST 1983 · In Situ; (United States)

OSTI ID:6070441

Stephenson, D E

Subsidence has been identified as one of the issues which may significantly affect the success of UCG processes, since they can lead to environmental problems on the surface and in the disruption of aquifers. Subsidence may also affect the UCG process in terms of cavity formation and geometry, as well as potential fracturing leading to connections with neighbouring coal seams. Using a finite element model which included the effects of discontinuities and bedding plane slip, subsidence effects were investigated with and without the effects of thermal conditions based on the geological characteristics of the San Juan Basin, New Mexico. Predicted results are presented for a proposed UCG operation at a depth of about 259 m in the San Juan Basin and compared with empirical data.

• OSTI ID: 6070441
• Journal Information: In Situ; (United States), Journal Name: In Situ; (United States) Vol. 7:1; ISSN ISOMD
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404 -- Coal
Lignite
& Peat-- Gasification
010900* -- Coal
Lignite
& Peat-- Environmental Aspects
CAVITIES
COAL GASIFICATION
DEPTH
DIMENSIONS
ENVIRONMENTAL IMPACTS
FINITE ELEMENT METHOD
GASIFICATION
GEOLOGIC STRUCTURES
GROUND SUBSIDENCE
IN-SITU GASIFICATION
IN-SITU PROCESSING
MATHEMATICAL MODELS
MATHEMATICS
NUMERICAL ANALYSIS
NUMERICAL SOLUTION
PROCESSING
THERMOCHEMICAL PROCESSES