Difficulty Evaluation Method and Application Study of Geological Environment Restoration in Open-Pit Limestone Mines
The geological environment restoration of abandoned open-pit limestone mines is an important part of the construction of ecological civilization.It is of great significance to carry out scientific rating zoning and put forward targeted treatment plans.Based on the basic principles of analytic hierarchy process(AHP)and fuzzy mathematics,the evaluation index system of geological environment restoration difficulty of abandoned open-pit limestone mine was constructed,and a research method based on improved analytic hierarchy process to determine index weight and fuzzy comprehensive evaluation was proposed.Taking Lijiawo mine in Jinan City,Shandong Province as the research area,the geological environment restoration difficulty evaluation and treatment plan were carried out.The results show that in the evaluation index system,slope inclination,distribution of dangerous rock mass and slope height are the key indexes,with weights of 0.360 47,0.194 02 and 0.184 36,respectively.The areas with great difficulty for geological environment restoration in the study area mainly have high and steep slopes and dangerous rock mass distribution.According to different zones,the corresponding treatment schemes of dangerous rock mass treatment,residual hill cleaning and slope greening were put forward.The research results can provide a reference for the difficulty evaluation and division treatment of geological environment restoration in open-pit limestone mines.
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