What is the primary type of mining that takes place under the bolivian mountain, cerro rico?

The Bolivian mountain found in the Cerro Rico de Potosi is also known as "the mountain that eats man". This is because many workers had lost their lives  while working in the mines. Silver mining is the primary type of mining that takes place under this mountain. Bolivian mountain is the largest silver mine in the world. 

look it up                         upk i

Explanation: