What is the deepest underground that humans have ever lived and who were those humans?

The deepest underground that humans have ever lived is approximately 2.4 kilometers (about 1.5 miles) below the Earth's surface in the Kola Superdeep Borehole in Russia. This research facility was established during the Soviet era, and while no humans permanently resided there, scientists conducted extensive studies in shifts. In terms of permanent habitation, miners in various deep mines, such as those in South Africa, have lived around 3 kilometers (about 1.9 miles) below the surface for extended periods.