基于脆弱性指数法的整合矿井底板突水评价及主控因素分析

整合矿井因地质资料难以统一,预测底板突水难度较大。鉴于AHP脆弱性指数法在量化底板突水的优势,选取了6个主控因素预测了某整合矿井9号煤层底板突水。结合GIS对相关数据实施归一化处理,建立了各单因素归一化专题图。根据层次分析模型获得的各因素权重对6个专题图进行叠加,将底板划分为脆弱区、较脆弱区、过渡区和安全区四部分,并得到了以往突水事故的验证。通过对各个因素的脆弱性灵敏度分析,得出有效隔水层厚度与脆弱性指数的相关度最高,提出了井田西部优先开采、东部重点防治的建议。该研究对预测整合矿井的底板突水具有一定的指导作用。

Study on the water inrush evaluation and major contributing factors determination using vulnerable index method in a built-up coal mine

The hydrological data is always incomplete and inaccurate in built-up coal mines,which leads to many difficulties in water inrush forecasts.The AHP vulnerable index method was applied to analyze the water inrush risk because of its advantage in quantifying the influence of related factors.Six factors were selected as the major contributing factors in the evaluation model.The corresponding single factor thematic map was established through GIS and the weight of each factor was acquired through the established AHP model.By superposing the six factors,the entire floor was divided into four zones,which were vulnerable area,slight vulnerable area,slight safe area and safe area respectively.The past water inrush accident verified the forecast result.The sensitivity of the six factors was analyzed and the water-resisting layer played a significant role in controlling water inrush from floor.Several suggestions based on the prediction results were put forward: the west area should be mined firstly and the east area should be put focus prevention.The methodology has guiding significance on forecasting and controlling water inrush in built-up coal mines.