Spasid: A Computer Program for Predicting Ground Movement Due to Underground Mining; User Manual.
NTIS: PB/84-175074 :201 pages
This report is a self-contained user manual for a computer program called spasid (subsidence prediction and system identification). The program has two primary functions: (1) precalculation of ground movements due to underground mining operations using the influence function method and (2) computation of influence function and site parameters from measured displacements. Spasid is written in Fortran and consists of four modules: (1) a preprocessor module that prepares and maintains surface and mine data bases, (2) a subsidence computation module that predicts movements of the surface, (3) a system identification module that is used to calculate the optimal influence function parameters, and (4) a postprocessor module for generating graphic displays of subsidence data. All of the modules may be run in either batch or interactive mode. The manual does not assume previous knowledge of the influenced function method or programing competence.
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Pennsylvania State University