Mine closure
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Mine closure is the period of time when the ore-extracting activities of a mine have ceased, and final decommissioning and mine reclamation are being completed. It is generally associated with reduced employment levels, which can have a significant negative impact on local economies. It is also the period when the majority of mine reclamation is completed, making the land safe and useful again.
Closure planning is an activity that continues throughout the life of a mine, starting with conceptual closure plans prior to production, periodic updates throughout the life of the mine, and a final decommissioning plan.
At most mines, progressive reclamation over the life of the mine is used to reduce the reclamation burden at closure.
Most mine shafts are capped, meaning a large concrete plug around 3 foot thick is placed over the shaft to cover it and stop fatal accidents from occurring. Some mines are capped using large metallic grills, this usual occurs on deep level shafts so airflow through the deep tunnels helps prevent subsidence.
