基于改进AHP方法的西露天矿区地质稳定性评价

Evaluation of Geological Stability of Western Open-pit Mining Area Based on Improved AHP Method

针对西露天矿区地质稳定影响因素众多等原因,在利用AHP法对西露天矿区进行地质分区中,提出在构造判断矩阵时,在原先"3标度"的基础上采用0.5~1.0之间的数值对两者之间的重要程度进行标度,并建立2级3类8项的研究区域模糊评价体系。将用改进的AHP方法计算得到的权重代入后,经Arc Gis图层叠加得出综合工程地质分区。通过对比现场建筑破损情况,证明改进的AHP方法更加符合工程实际。最后针对部分不稳定地区,提出了边坡和建筑物加固建议。该方法为西露天矿区稳定性评价提供了参考。

In view of many factors affecting geological stability of the west open-pit mining area,in the geological division of the west open-pit mining area by AHP method,the value between 0.5 and 1.0 was used to scale the importance degree of the two based on the original"3-scale"when constructing judgment matrix,and the fuzzy evaluation system of the study area with 2 levels,3 categories and 8 items was established.After substituting the weight calculated by the improved AHP method,the comprehensive engineering geological division was obtained by superimposing the Arc GIS layer.By comparing the damage of buildings on site,it is proved that the improved AHP method is more in line with the actual engineering.Finally,some suggestions for slope and building reinforcement were put forward.This method can provide a reference for the stability evaluation of the west open-pit mining area.