Goaf governance technology in Donggou Mu mine underground mining

Using thickness span ratio calculation method and load transfer line intersection method and other calculation method, the article determines minimum safety thickness of roof. Through comparing several common goaf treatment methods on technology and economy, the article finally determines the main treatment method of deep hole caving in the ground, supplementary treatment method of underground isolation method. The results show that goaf treatment technology is favorable to the later open-pit mining and saves costs.