Surface subsidence mechanisms - theory and practice. Part II - subsidence mechanisms in practice

In Part I - Theory, a number of surface subsidence mechanisms were identified on the basis of elastic theory. Some of these were illustrated by field results. In Part II actual behaviour is compared to theoretical behaviour. NSW subsidence data are evaluated in the light of subsidence mechanisms and empirically derived design curves are critically evaluated. Rock mechanics principles which govern mine design for both controlling surface subsidence and ensuring local and regional stability of workings are discussed in Park III. 13 refs., 20 figs.