Prediction assessment of ground pressure risk based on combination weight and set pair analysis

In complex mining environment, the location of monitoring points directly affects the effect and quality of ground pressure monitoring. In order to select the location of ground pressure monitoring scientifically and reasonably and achieve the effect of key monitoring in key areas, it is necessary to conduct a pre-evaluation before ground pressure monitoring. In this paper, the risk evaluation model of ground pressure based on combination weight and set pair analysis is established. Five indexes, including rock uniaxial compressive strength, rock mass integrity coefficient, groundwater condition, structural plane condition and mining environment factor, are taken as evaluation factors. The risk of ground pressure is evaluated by combining entropy weight method and analytic hierarchy process, it is verified by the example of ground pressure monitoring in Luohe Iron Mine. The results show that the grade of No. 5 and No. 7 samples is Ⅳ, which belongs to high risk level and is consistent with the actual monitoring situation. The combination weight and set pair analysis model can provide a more objective and reasonable reference for the selection of key areas of ground pressure monitoring and the layout of monitoring points, and also provides a new idea for the ground pressure early warning of stope.