How are diamonds mined in Jubilee Mine Russia?

The Jubilee Mine in Russia is the largest open-pit diamond mine in the world. It exists on the Yubileynaya kimberlite pipe. From a mining engineering Web site, here is the definition of open-pit mining:

"[It is]. . . an excavation or cut made at the surface of the ground for the purpose of extracting ore and which is open to the surface for the duration of the mine's life."