Managing the impact of rock and mineral extraction：練習題

What is the primary goal of land restoration after an opencast mine has been exhausted?

In many regions, exhausted open-pit mines are repurposed for waste management. What is a significant environmental risk associated with using an old mine site as a landfill?

A mining company is required to perform soil improvement on a site where the topsoil was removed years ago. The current substrate is highly acidic and lacks nutrients.

Which combination of treatments would be most effective for successful tree planting?

Which strategy for restoring a mining site specifically uses plants to absorb or break down toxic substances in the soil?

Which strategy is most effective for the safe disposal of mining waste, known as tailings, to prevent the contamination of local water supplies?

Explain how tree planting and the addition of organic matter are used in the process of land restoration following opencast mining.

Evaluate the role of an Environmental Impact Assessment (EIA) in minimizing the loss of habitat during the planning stage of a new mine.

Describe how visual pollution from an active mine site can be managed using landscaping or screening techniques to reduce its impact on the local community.

When a mine closes, the land must be restored to reduce the long-term environmental impact.
(a) Explain the process of soil improvement as a strategy for land restoration at a former mining site.
(b) Suggest how a former opencast mine could be successfully repurposed into a nature reserve or a recreational lake.