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The aim of this study is to develop eco-friendly, fundamental technology for vegetative restoration of barren lands using green rehabilitation material, for the stabilization of abandoned mine debris slopes and depository slopes composed of rock fragments. It is expected that such methods would help to improve the negative view of artificial slopes that remain following mining activity, while also contributing to slope stabilization and prevention of the loss of rock fragments and the dispersion of tailings. We tested the tensile strength and tear strength of various materials, including commonly used natural coir material, natural fibers, and synthetic textile materials with enhanced durability. In conclusion, there is the possibility that natural coir can be used as an eco-friendly material in vegetation restoration, while its durability in natural conditions can be improved by controlling the degree of knot convolution and by antibacterial treatment against biodegradation.

Surface subsidence in abandoned mine areas is a keen issue since it can cause loss of lives and serious property damage. However, the hazard of surface subsidence cannot usually be predicted in advance because surface subsidence is affected by many parameters. In this study, numerical simulation was carried out to predict the probability of surface subsidence. Many factors, such as cavity size, geometry, rock mass condition, rainfall and groundwater table, are well known for their key roles. Much research has been carried out to predict the probability of surface subsidence induced by the collapse or squeezing of a mined opening. In this study, the cavity geometry (i.e. depth, width, height and angle of cavity) and rock mass condition were selected as the key parameters for subsidence. A conceptual genetic cavity model in a horizontally layered rock mass was considered in the numerical simulation. The relationship between each of the selected factors and the hazard of subsidence was obtained. The vertical...

Mining activities have not only provided positive impacts on eco-social development but also caused many adverse ones on social and environmental conditions. Measurement of sustainable development for this specific economic sector requires specific considerations and implements in a sustainable development concept. This paper provides essential information regarding sustainable development issues, sustainable development evaluation and the wide range of effective applications of the two multi-criteria approaches, analytic hierarchy process (AHP) and fuzzy AHP. The aims of this paper are to discuss the urgent tasks of sustainable development problems in the mining sector, and to suggest a potential and practical approach of fuzzy AHP in the evaluation of sustainable development for mining sector. Moreover, this paper discusses the strong possibility of fuzzy AHP approaches for designing a sustainability system in the mining sector and handling uncertainty in deriving the priorities of components i...