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Cave Propagation, Subsidence and Mine–Surface Interaction

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Along with the analysis of caving occurrence, it is also important to estimate the cave propagation rates and to define the extent of cave limits. Mining-induced subsidence is an inevitable artifact of underground ore extraction, to the point that proper planning of a cave mining project must assess the impact of ground movements on surface buildings and facilities and determine the necessary stand-off distances for the siting of mine shafts and other infrastructure.

In the case of transition from open pit to cave mining, the subsidence effect can have a destabilizing effect on the existing slopes, which must be taken into account to plan mining method migration or coexistence.

Some of the usual activities involved in this subject are:

  • Modeling of cave back evolution, cave propagation, and breakthrough to overlying levels or surface.
  • Subsidence prediction and impact assessment for pits, infrastructure, and environmental stakeholders.
  • Interaction studies between caves and major underground excavations (shafts, access drives, major pillars).
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