Case Studies in the Application of Influence Functions to Visualising Surface Subsidence

The influence function method assumes that a subsidence surface can be represented as a mathematical function. In the case studies presented a gaussian function is used. Examples are given of how the influence function is calibrated to local mine performance, and also in greenfields applications. In the latter cases, geotechnical analysis of likely performance of pillars and roof and floor strata were incorporated into the analysis. The major application of the influence function method is in visualising subsidence – as the method models surfaces and surface deformations. Detailed post mining topography and deformation histories can be produced.