基于改进AHP-独立性权系数法的地质构造复杂程度定量评价

Quantitative Evaluation of Geological Structure Complexity Based on Improved AHP-Independent Weight Coefficient Method

矿井地质构造发育特征对工作面安全高效回采具有重要的实际意义,以淮北矿区钱营孜煤矿西一东一采区间孤立块段(下文统称研究区)为研究对象,在分析研究区地质资料基础上,选取断层密度、断层强度、断裂分维值、褶皱平面变形系数等4个指标,采用改进AHP-独立性权系数法相结合的综合确权方法,基于ArcGIS软件建立地质构造复杂程度综合评价模型,开展了研究区地质构造发育程度定量评价。研究结果表明:4个评价指标的权重分别为0.1326、0.1621、0.3834、0.3219,其中断裂分维值对构造复杂程度影响最大;研究区的构造复杂程度可分为复杂、较复杂、中等、简单4个等级,其中研究区中部构造复杂程度最大,研究结果对研究区下一步巷道掘进及回采具有一定指导意义,同时为类似新采区采前构造预测与评价提供了一种新方法。

The development characteristics of mine geological structure have important practical significance to the safe and efficient mining of working face.Taking the isolated block between the west and east mining areas of Qianyingzi coal mine in Huaibei mining area(hereinafter referred to as the study area)as the research object,based on the analysis of the geological data of the study area,selecting four indexes,such as fault density,fault strength,fracture fractal dimension and plane deformation coefficient of fold,adopting a comprehensive weight determination method combining improved AHP-independent weight coefficient.Based on ArcGIS software,establishing the comprehensive evaluation model of geological structure complexity in the study area to carry out quantitative evaluation of the development degree of geological structure in the study area.The results show that the weights of the four evaluation indexes are 0.1326,0.1621,0.3834 and 0.3219 respectively,and the fractal dimension of the fault has the greatest influence on the complexity of the structure.The structural complexity of the study area can be divided into four levels:complex,relatively complex,medium and simple,among which the structural complexity of the central part of the study area is the largest.The research results have certain guiding significance for the next roadway excavation and mining in the study area,and provide a new method for the prediction and evaluation ofpremining structures in similar new mining areas.