underground activity

Various forms of underground activity, such as deep wells or the disposal of hazardous materials, require the long-term sealing of rocks.

Shabangu said the government department was working with a team of inspectors from the company that previously operated the mine as well as mine rescue services to determine if the underground activity detected is “human movement.”

It's true that the majority of media reports heavily feature men; that's because those who participate in public demonstrations and those who get arrested because of underground activity tend to be men.

“I was afraid, but I’d been involved in this underground activity for a long time, and I knew that at some point I would end up in prison,” Rybakov said.

But federal prosecutors also said such cases have been relatively rare in the 14 years since Congress made dogfighting a felony crime and football star Michael Vick went to prison for participating in the underground activity.