Framework of the theory and technology for mine closure

HUANG Bingxiang; LIU Jiangwei; LI Nan; ZHAO Xinglong

Abstract：With the increasing of abandoned mines,the safety and environmental problems caused by mine closure are becoming more and more prominent.Meanwhile,a vast amount of underground spaces can be utilized.The concept of "total life cycle mining" was defined and the connotation of "total life cycle mining" was revealed.The number and characteristics of abandoned mines and underground spaces were analyzed.Basic frameworks of engineering background,scientific issues,key technology and practices of mine closure were proposed.Theoretical problems of evaluation criterion and responsibility system for abandoned mine,subsidence law of overburden of the goaf in long term,multi-field coupling and migration law of water,gas and contaminant in the goaf,evaluation criterion for long-term stability of underground space,utilizing methods for underground space were discussed.On this basis,the key technical issues of long-term safety evaluation and monitoring technology,long-term environmental assessment and monitoring technology,utilization technology for the space of development road and goaf,eco-environment restoration technology of mine closure were analyzed.The concept of mine closure for the government and mine enterprises should be changed.More attention should be paid to the safety and environment problems caused by mine closure.The mine closure should be considered in the view of total life cycle.The monitoring,evaluation and restoration technology of long-term safety and environment should be investigated.