基于FDAHP与独立性权系数综合确权的煤层顶板隔水性能评价

Evaluation of Coal Seam Roof Water-Resistance Performance Based on FDAHP and Independent Weight Coefficient Method

摘要: 在评价煤层顶板隔水性能时多采用单一主、客观赋权的传统多源信息融合方法，为避免这些不足，以布尔台煤矿4₂202工作面为例，在充分考虑影响4煤顶板隔水性能各因素的基础上，确定了粗中砂岩厚度、细砂岩厚度、粉砂岩厚度、脆塑性岩厚度比、岩芯采取率、隔水层厚度和隔水层组岩性组合指数为影响其隔水性能的7大主控因素；采用模糊德尔菲层次分析法(FDAHP)和独立性权系数法分别计算各主控因素的主、客观权重，归一化得到综合权重；利用Arcgis软件建立了工作面顶板隔水性能分区图。结果表明，区内西北向的隔水性能较强，与采掘工作面倾斜方向拟合效果明显，4₂202工作面煤层顶板岩层阻隔水性能在中等强度到弱之间，优于临近的4₂201工作面。

Abstract: Traditional multi-source information fusion methods with single subjective or objective weighting are often used when evaluating the water-resistance performance of coal seam roof. To avoid these inadequacies, 7 major controlling factors including the coarse and medium sandstone thickness, fine sandstone thickness, siltstone thickness, brittle-plastic rock thickness ratio, core monitor rate, waterproof layer thickness and lithology combination index of water-resisting layer group were selected based on the fully consideration of various factors affecting the No. 4 coal roof water-resistance. This paper calculated the subjective and objective weights of each main controlling factor respectively by the FDAHP and independent weight coefficient methods, and obtained the comprehensive weight by the normalization; using Arcgis to establish a partition map of the water-resistance performance of coal seam roof. The results show that the water resistance in the northwest direction of the area is strong, obvious fitting effect of the inclination direction of the mining face, the water-resistance performance of coal seam roof in 4₂202 working face is between medium strength and weak, which is better than that of the 4₂201 working face.