Evaluation Of Rock Slope Stability And Ecological Restoration Suitability In Xuzhou City

With the rapid development of my country’s economy and the increasing intensity of resource development,engineering mining has formed a large number of exposed abandoned rock slopes.These slopes lack vegetation and will induce a series of geological environmental problems such as mine geological disasters and soil erosion.Among them,Xuzhou City is a resource-exhausted city,and the abandoned slopes formed by quarrying mines are difficult to restore because of their high steepness and no soil cover.Under the policy guidance of the 19 th and 20 th National Congresses,more and more scholars have paid attention to this field and developed various ecological restoration technologies,but at present,most of them are guided by experience and lack quantitative evaluation,resulting in unsatisfactory restoration effects.Based on the above realistic background,this thesis determines the urban area of Xuzhou as the research area,and 8 abandoned rock slopes in the urban area of Xuzhou as the research objects.Firstly,an on-site survey of typical rock slope ecological restoration projects in Xuzhou City was carried out,the applicability,advantages and disadvantages of different ecological restoration technologies were clarified,and the technical solutions for rock slope ecological restoration suitable for Xuzhou area were optimized in combination with industry norms;Secondly,the basic conditions of ecological restoration are summarized from the aspects of geological structure,slope geometric characteristics,and natural geography of the mining area.It is believed that the slope is the dominant factor affecting ecological restoration,and slope stability is the basic premise of ecological restoration;The stability of the slopes was evaluated using the polar stereographic projection,and the 8 rock slopes in the study area were basically stable or stable.Taking the land suitability evaluation as a reference,the adaptability evaluation index system established by the analytic hierarchy process covers 15 rating indexes in four aspects including rock mass structural conditions,slope geometric characteristics,mining area soil conditions,vegetation and climate conditions.The fuzzy analytic hierarchy process calculates the weight of 15 indicators,among which the slope weight accounts for the largest proportion,which verifies the previous assumption;the cloud model and the fuzzy comprehensive evaluation method are combined to conduct a comprehensive evaluation of the suitability of ecological restoration,and 6 slopes are more suitable at level II,the two slopes are barely suitable for grade III.According to the evaluation results and the previous selected rock slope ecological restoration technology scheme in Xuzhou area,the ecological restoration technology is recommended.Taking the No.1 slope as an example,from the aspects of slope reinforcement,The preliminary engineering design is carried out from the perspective of ecological restoration,in order to provide reference for the ecological restoration of rocky slopes.