Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Subsidence and Stability Studies for Underground Coal Gasification
By removing from the calculation in later iterations roof elements in a tensile state of stress (which are assumed to fall), we have improved the nonlinear finite-element techniques previously used for predicting subsidence at the Hoe Creek underground coal gasification site. To supplement the finite element approach, we have applied some elasticity solutions to the problem in a nondimensional parametric formulation. The elastic solutions indicate the extent of the induced tensile zone in the roof, and we have used this zone to predict the arch height in an underground cavity. The arch heights found by this method compare favorably with those found by the finite element method with extraction of roof elements. Finally, we have conducted a series of laboratory core tests to determine material properties of Hoe Creek rock samples to provide better data, both for future subsidence studies and for comparison of predicted subsidence with field measurements during and after coal gasification experiments. (ERA citation 03:030043)
Subsidence and Stability Studies for Underground Coal Gasification
By removing from the calculation in later iterations roof elements in a tensile state of stress (which are assumed to fall), we have improved the nonlinear finite-element techniques previously used for predicting subsidence at the Hoe Creek underground coal gasification site. To supplement the finite element approach, we have applied some elasticity solutions to the problem in a nondimensional parametric formulation. The elastic solutions indicate the extent of the induced tensile zone in the roof, and we have used this zone to predict the arch height in an underground cavity. The arch heights found by this method compare favorably with those found by the finite element method with extraction of roof elements. Finally, we have conducted a series of laboratory core tests to determine material properties of Hoe Creek rock samples to provide better data, both for future subsidence studies and for comparison of predicted subsidence with field measurements during and after coal gasification experiments. (ERA citation 03:030043)
Subsidence and Stability Studies for Underground Coal Gasification
R. C. Greenlaw (Autor:in) / H. C. Ganow (Autor:in) / R. T. Langland (Autor:in)
1977
30 pages
Report
Keine Angabe
Englisch
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