邯邢式大水铁矿突水风险评价方法研究——以白涧铁矿为例

Study on water inrush risk assessment system of Hanxing-type water-rich iron deposit——A case study of Baijian iron mine

针对邯邢式大水铁矿复杂的水文地质条件,本文结合白涧铁矿区实际情况,选取断裂构造、矿体顶板水压、钻孔密度、矿体顶板围岩裂隙分布、矿体顶板岩石质量指标及矿体顶板岩性共6项指标,提出了邯邢式大水铁矿开采突水风险的评价方法。采用和积法对各评价指标进行了权重分配,同时利用Arc GIS软件对各专题图进行复合叠加处理,得到了白涧铁矿区突水风险评价分区图。结果表明:白涧铁矿区突水高风险、较高风险、中风险及低风险区分别占总面积的5.54%、15.75%、50.26%和28.45%。高风险区、较高风险区主要分布于矿区东侧F_(2)、F_(3)、F_(4)断层轴部及两侧,矿区基建或开采时需重点防治。通过评价邯邢式大水铁矿—白涧铁矿的矿区突水风险,以期对同类矿山进行水害防治提供一定的借鉴。

In view of the complex hydrogeological conditions of Hanxing-type water-rich iron deposit and combined with the actual situation of Baijian iron mine,six factors including geological faults,water pressure above ore body,borehole density,distribution of the roof rock crack,RQD value and lithology of the roof rock are taken as the main controlling factors for the risk evaluation of water inrush in the Hanxing-type water-rich iron deposit.The weight of each evaluation index was obtained by sum-product method.Using ArcGIS software to perform composite overlay processing on the thematic maps,a zoning map for water inrush risk assessment of Baijian iron mine was obtained.The results show that the very high-risk,high-risk,medium risk and low-risk area of water inrush in Baijian iron mine is around 5.54,15.75,50.26 and 28.45percent respectively.Very high-risk areas and high-risk areas are mainly located on the axis and both sides of F_(2),F_(3),and F_(4) faults,where key preven-tion and control measures should be taken during infrastructure construction or mining.By evaluating the water inrush risk of Hanxing-type water-rich iron deposit-Baijian iron mine,this paper aims to provide some reference for water damage prevention in similar mines.