What types of mining operations does the state of Missouri inspect? October 05, 2023 13:34 Updated Coal, clay, shale, iron, lead, zinc, copper, silica sand, cobalt, rhyolite, and granite mining operations. Related articles I work for an underground mining company. Do I have to work longer than eight hours a day? How many hours of training must I provide to a new mine employee? How can I schedule a consultation to help me compile a proper mine safety and health program? What is workers′ compensation insurance? What is the purpose of the Tort Victims′ Compensation Fund?