Research on the rational application of overhanging plant bags in granite stone mining areas

With the state's emphasis on environmental protection, mine ecological restoration has been included as one of the main tasks of national ecological environmental protection. Our country is currently trying to optimize the ecological environment protection effect and repair environmental problems. Mine ecological restoration is a complex and challenging task, especially for granite face stope slope, which is a rock slope with a thin soil layer, low fertility, and lack of nutrients required for vegetation growth. Traditional vegetation restoration technology is difficult to apply on such slopes, and planting bag technology can be considered for ecological restoration treatment. In this study, Midas GTS/NX geotechnical finite element analysis software will be used to study the influence of overhang planting bag technology on slope stability and the feasibility of overhang planting bag technology for granite stope slope. Finally, it is concluded that applying an overhang planting bag in a granite stope slope is feasible. The influence of the overhanging bag on the slope shear force and displacement is obtained by studying and analyzing the slope stability coefficient, displacement, and maximum shear stress of the overhanging bag with different spacing. The relationship curve between the shear stress and displacement and the slope foot distance is extracted, and the optimal value of the overhanging bag layout spacing is calculated. The analysis results show that the optimal layout spacing of overhanging planting bags is obtained. When the layout spacing is 2m, the shear stress and displacement fluctuate less and are more stable. The conclusion of this study has certain applicability and aims to provide a reference for similar engineering applications.