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Combined Stability-deformation Analysis for Rock Slopes in Open Pit and Strip Mines.

Authors
Kafritsas-J; Einstein-HH; Baecher-GB
Source
For Reference Only At Bureau Libraries :115 pages
Link
NIOSHTIC No.
10003135
Abstract
This report presents a computer analysis that couples the deformation of a rock mass and the flow of water in its joints. Two- dimensional problems involving a rock mass transversed by relatively closely spaced joint sets that divide it into distinct blocks can be treated. Deformations are modeled using the rigid block method, which assumes that the rock mass is composed of rigid rocks with the deformable contact points. The analysis proceeds in time steps, evaluating at a series of successive instants the forces acting on each block. The forces are used to find the acceleration of each block, which is then integrated to find the displacement increment of each block during the time step under consideration. There are considerably different force-deformation laws, time-dependent behavior, or expansive properties of joint fillers. Flow is modeled by recognizing its discontinuous features as occurring in a system of interconnected conduits formed by the joints. Both laminar and nonlaminar flow can be modeled, as can problems involving free- surface flow. Full account is taken of the coupling between flow and deformation.
Publication Date
19830101
Document Type
CP; Final Contract Report;
Fiscal Year
1983
NTIS Accession No.
NTIS Price
Identifying No.
OFR 183-83
NIOSH Division
WO;
Source Name
For Reference Only At Bureau Libraries
Performing Organization
Mit
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