The article provides an environmental assessment of the use of technologies for backfilling mined-out areas in the contour zones of quarries from the perspective of sustainable development of mining territories. The relevance of the study is due to the need to reduce the negative impact of mining operations on the environment and to improve environmental safety in the development of mineral resources. The main focus is on the analysis of backfilling technologies as a tool for minimising man-made disturbances, stabilising the geological environment and reducing deformation processes in the contour zones. The research methodology is based on the assessment of a set of environmental and geotechnical indicators characterising the stability of the rock mass, the level of ground surface disturbances and the degree of environmental risk. The results of the study show that the use of backfill technologies contributes to reducing the impact of mining operations on the environment and increasing the stability of mining facilities. The conclusions confirm the feasibility of introducing environmentally oriented mining technologies as one of the directions for ensuring sustainable development and implementing the principles of environmentally responsible nature management