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Managing Slope Stability Hazards in Volcanically Active Environments
New Zealand is an island country of 5 million people in the southwestern Pacific Ocean. It consists of two main landmasses - the North Island and the South Island. The country's varied topography and sharp mountain peaks, including the Southern Alps, owe much to tectonic uplift and volcanic eruptions. Slope stability is an issue for many parts of New Zealand. Steep slopes, tectonics and rainfall are the main causes of slope failure.
New Zealand has between 600–1,100 active quarries, most of them very small. Many operate intermittently based on seasonal or local demand and many lay dormant for periods up to 2 years. This is particularly relevant to hazards associated with slope stability, particularly in weathered rock at quarries in areas of high rainfall.
Slope failures can occur at mines and quarries in highly weathered faces, loosely consolidated excavated overburden faces, overburden dumps, product stockpiles, and tailings dam embankments. At sites where the risk of slope instability is high, it is critical that cracks, faces, tip heads and stockpiles are monitored for movement to ensure the protection of personnel, equipment and facilities.
If material does fail, the mine/quarry should have a pre-planned response to the movement. If a slope failure is imminent, personnel must immediately be pulled out of the hazardous area.
In New Zealand, the majority of mines and quarries are required to have Ground Control Management Plans (GCMP). The level of detail in these plans is determined through risk assessment of the slope stability hazards. It is important to consider the exposure time of personnel to potentially unstable walls, potential for short-term changes in ground conditions, the potential for long-term changes in ground conditions, and loose rock rill on berms that may affect the "catch" capability of falling rock.
Managing Slope Stability Hazards in Volcanically Active Environments
New Zealand is an island country of 5 million people in the southwestern Pacific Ocean. It consists of two main landmasses - the North Island and the South Island. The country's varied topography and sharp mountain peaks, including the Southern Alps, owe much to tectonic uplift and volcanic eruptions. Slope stability is an issue for many parts of New Zealand. Steep slopes, tectonics and rainfall are the main causes of slope failure.
New Zealand has between 600–1,100 active quarries, most of them very small. Many operate intermittently based on seasonal or local demand and many lay dormant for periods up to 2 years. This is particularly relevant to hazards associated with slope stability, particularly in weathered rock at quarries in areas of high rainfall.
Slope failures can occur at mines and quarries in highly weathered faces, loosely consolidated excavated overburden faces, overburden dumps, product stockpiles, and tailings dam embankments. At sites where the risk of slope instability is high, it is critical that cracks, faces, tip heads and stockpiles are monitored for movement to ensure the protection of personnel, equipment and facilities.
If material does fail, the mine/quarry should have a pre-planned response to the movement. If a slope failure is imminent, personnel must immediately be pulled out of the hazardous area.
In New Zealand, the majority of mines and quarries are required to have Ground Control Management Plans (GCMP). The level of detail in these plans is determined through risk assessment of the slope stability hazards. It is important to consider the exposure time of personnel to potentially unstable walls, potential for short-term changes in ground conditions, the potential for long-term changes in ground conditions, and loose rock rill on berms that may affect the "catch" capability of falling rock.
Managing Slope Stability Hazards in Volcanically Active Environments
Lecture Notes in Civil Engineering
Verma, Amit Kumar (editor) / Mohamad, Edy Tonnizam (editor) / Bhatawdekar, Ramesh Murlidhar (editor) / Raina, Avtar Krishen (editor) / Khandelwal, Manoj (editor) / Armaghani, Danial (editor) / Sarkar, Kripamoy (editor) / Scott, Wayne H. (author)
International Conference on Geotechnical Challenges in Mining, Tunneling and Underground Infrastructures ; 2021
Proceedings of Geotechnical Challenges in Mining, Tunneling and Underground Infrastructures ; Chapter: 44 ; 653-668
2022-06-04
16 pages
Article/Chapter (Book)
Electronic Resource
English
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