- Decommissioning & Demolition
- EHS Compliance & Management Systems
- Energy & Renewables
- Environmental & Social Impact Assessment
- Geotechnical Engineering (Ground Engineering)
- Hydrogeology (Groundwater)
- Hydrology (Surface Water & Sediments)
- Integrated Tailings Management
Stability Assesment Underway for New Use of Open Pit Mine
Northwestern Spain, Europe
|Client||Orvana Minerals of Canada|
|Services||Geotechnical Engineering, Groundwater/Hydrogeology, Surface Water/Sediments, Tailings Management, – soil and rock mechanics, soil rock and mining engineering|
Production at the El Valle-Boinas mining site, within the Rio Narcea Gold Belt, had largely been done by open pit methods prior to switching to underground in 2004. The original tailings storage facility (TSF) had also been closed. <
When Orvana Minerals acquired the mine in 2009, the intent was to develop the underground deposit adjacent to the closed pits. To minimise environmental impact, the closed El Valle pit was proposed for permanent storage of the waste (tailings) from the plant processing the ore from the new underground works. Two significant slope failures had already occurred post-closure, along with extensive erosion of the lower slopes. As part of the permitting process, regulators required that the stability of the pit slopes be assessed and remedial measures be implemented to ensure the TSF operates safely.
A multidisciplinary Golder team from Spain, UK, France and Ireland have investigated geotechnical and hydrogeological conditions. Their work has resulted in an updated geotechnical model and design assessment to attain the necessary safety factor on the pit walls. The solution was to cut back the slope angle of the pit wall, along with improving the management of surface water and installing discrete slope support measures.
Geotechnical Engineering (Ground Engineering)
Providing solutions to our clients’ ground engineering challenges around the world for 50 years – our team brings a wealth of...
Groundwater is an important natural resource which provides benefits to the public, industry and agriculture through water supply....
Hydrology (Surface Water & Sediments)
Our engineers and scientists use state-of-the-art tools and techniques to find solutions to hydrologic, hydraulic and water management...
Integrated Tailings Management
On a daily basis, we work on mines around the world to design, build, operate or close mine waste management facilities, including:...