基于粗糙集与AHP的地下空间开发地质适宜性评价模型构建方法研究

Construction Method of Geological Suitability Evaluation Model of Underground Space Development Based on Rough Set and AHP

对地下空间开发地质适宜性进行科学、合理的评价,是充分利用地下空间资源、合理确定开发功能和规模、编制地下空间规划的重要基础条件。先采用层次分析(AHP)法从地质结构、地形地貌、岩土体特征、水文地质四个方面进行分析,建立地下空间开发地质适宜性评价指标体系并计算其主观权重;然后结合基于条件熵的改进粗糙集方法,计算指标属性的自身和相对重要程度,通过标准化处理,得到各分类指标属性的客观权重;再综合考虑得到指标属性的组合权重;在此基础上,最后利用多目标线性加权函数法、最不利等级判别法等数学方法建立了地下空间开发地质适宜性评价数学模型对某区域进行评价,得到该区域地下空间开发地质适宜性评价分区图。本文指标权重确定方法和评价模型可为未来地下空间开发地质适宜性评价提供一定的借鉴。

In order to make full use of underground space resources,reasonably determine the development function and scale,and compile the master planning of underground space,the suitability evaluation of Urban Underground Space(UUS)should be scientific and reasonable.First,this paper applies Analytic Hierarchy Process(AHP)to analyze the geological structure,geomorphology,geotechnical characteristics,and hydrogeology,etc.,establishes a geological suitability evaluation index system and calculates subjective weights of attributes.Then,combined with the improved rough set method based on conditional entropy,the paper calculates the index attributes and their relative importance,and obtains the objective weight of each classification index attribute through standardization processing.Next,considering the subjective and objective weights comprehensively,the paper obtains the combined weights of the index attributes.On this basis,the paper establishes geological suitability evaluation model of underground space development by using the multi-targets linear weighted function method and the most disadvantageous rank discrimination method,and conducts evaluation in a certain area.Finally,the partition map of regional underground space development suitability evaluation is obtained.The method of index weight determination and evaluation model can provide some references for future geological suitability evaluation of underground space development.