基于GIS保德煤矿8煤层底板突水危险性评价

Risk Assessment of Floor Water Inrush in NO.8 Coal Seam of BaodeCoal Mine Based on GIS

为了准确评价保德煤矿下组煤煤层底板奥灰水突水危险程度,以8煤层开采为例,分析确定了煤层底板突水的各主控因素,通过建立AHP模型计算得出各主控因素权重。并在此基础上得到基于GIS的脆弱性评价模型,对8煤层底板突水危险性做出评价并分区,然后与传统的突水系数法进行比较分析。结果表明,相对于传统的突水系数法只考虑了水压和隔水层厚度两个影响因素,基于GIS的脆弱性指数法更能反映不同区域的相对脆弱情况,更加符合实际情况。

In order to accurately evaluate the risk degree of Ordovician limestone water inrush in the lower coal seam floor of Baode coal mine,taking the mining of NO.8 coal seam as an example,the main control factors of water inrush from coal seam floor were analyzed and determined,and the weight of each main control factor was calculated by establishing AHP model.And then,the vulnerability evaluation model based on GIS was obtained,with which,the risk of water inrush from the floor of NO.8 coal seam was evaluated,partitioned and then compared with the traditional water inrush coefficient method.The results show that,compared with the traditional water inrush coefficient method,which only considers the water pressure and the thickness of aquiclude,the vulnerability index method based on GIS can better reflect the relative vulnerability of different regions in line with the actual situation better.