The completion of the second tailings
dam at Panasqueira will ensure the tailings
to be generated in the next 10 years from this historic mine to find its place in this new tailings
dam assuring the continued seamless operation of the mine which has more than 20 years of LOM under NI 41-101 resources.
This led to a large amount of radioactive contaminated material from the mining industry being disposed of in waste dumps and tailing
To meet international engineering standards, the tailing
's dam foundation was stripped of all alluvial material down to base rock and keyed in to reduce seepage.
Engineers, the TSF specialists who report to the Chief Operating Officer, conduct quarterly inspections of active TSFs, thereby providing a second layer of governance to ensure safe management of our TSFs.
The newly established Taskforce will be accountable for enhancing BHP's focus on tailings
, it said.
The disaster follows a similar event in 2015, when another tailings
dam in Minas Gerais owned by Samarco a joint venture between Vale and BHP Billiton--collapsed, killing 19 people.
Two types of iron ore tailings
were provided by the company Vale S/A, from the Mine Alegria, in the municipality of Mariana, State of Minas Gerais.
In previous studies, the effects of flocculants on structural stability were ignored, and thickened tailings
slurries were simplified as Bingham plastic fluid in pipeline transportation, whose flow properties were time-independent .
The cohesion c and the internal friction angle [phi] of lime-reinforced iron tailings
powder with different lime doses were calculated according to the Mohr-Coulomb principle (Equation (2)) and are plotted in Figure 6:
Mining activities at the Huogeqi Copper Mine, located in Inner Mongolia, China, have been conducted since 1986, resulting in a large quantity of mining wastes including tailings
and waste rock.