Question: deepest a man has been underground?
Answer: The deepest borehole drilled into the Earth's crust is the Kola Superdeep Borehole in Russia. ... The deepest mining operation, which would be the deepest humans have gotten into the crust, is the TauTona Mine, a gold mine in South Africa. It reached 3.9 kilometers (2.4 miles) underground in 2008.