Principles of Mining: Valuation, Organization and Administration
Chapter 10
Methods of Supporting Excavation
Timbering; filling with waste; filling with broken ore; pillars of ore; artificial pillars; caving system.
Principles of Mining: Valuation, Organization and Administration
Methods of Supporting Excavation
Timbering; filling with waste; filling with broken ore; pillars of ore; artificial pillars; caving system.