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At Anglo American’s Dawson Mine, the company pioneered the use of blasting techniques to successfully reshape void highwall into final landform position in 2013.
Pre- and post-blast surveying was undertaken to provide accurate estimates of how much reshaping and material was required for final landform. Four blasts were required to complete the project, which moved considerable amounts of highwall material into final landform position. Following reshaping, the area was seeded with a grazing mix of native and introduced species. It was then treated with five tonnes per ha of Gypsum in 2017 and re-seeded.
The area is currently being monitored for plant growth and species richness. Monitoring will continue every three years for progression to a stable state, and the area is expected to be ready for grazing activities in around four to five years. At the time, very few trials had been conducted using this sophisticated and innovative technique. The successful rehabilitation of the area has demonstrated the technique can be applied to reshaping mining voids – one of the most challenging aspects of rehabilitation for the industry – and rehabilitate land for productive post-mining use.
Key Facts:
- Anglo American’s Dawson Mine pioneered the use of blasting techniques to successfully reshape void highwall into its final landform position in 2013
- Pre and post-blast surveying was undertaken to provide accurate estimates of how much reshaping and material was required for final landform
- The area was then seeded with a grazing mix of native and introduced species
- It was then treated with five tonnes per hectare of Gypsum in 2017 and re-seeded
- Monitoring will continue every three years and the area is expected to be ready for grazing activities in around four to five years
Find out how mine rehabilitation legislation in Australia is changing in our FREE guide.
Useful links:
- National consortium on mine closure passes first hurdle
- What are the different types of mine rehab?
- Is mine rehabilitation in Australia progressive?
- Speak to our team for a free demo of our mine rehabilitation tool, DecipherGreen
- See how our solutions help manage environmental, standard and approval requirements for mine rehabilitation here
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