The incident took place at a depth of 1,172 metres (3,845 feet) within the Cheremukhovskaya-Glubokaya mine, owned by Rusal’s subsidiary SUBR. The mine is recognised as the second deepest in Russia and ranks among the deepest globally. Authorities have initiated a safety compliance inspection at the facility in response to the incident.
SUBR confirmed that the collapse occurred when the wall of one of the mine workings gave way and added that the miners were promptly brought to the surface.