基于水化学特征分析的铜川某矿井突水水源判别

Discrimination of mine water inrush source based on hydrochemical characteristics

长期以来,矿井水害严重威胁着矿山的安全生产,快速、准确地判定矿井突水水源是矿井水害治理的关键。在收集铜川某矿井以往各含水层大量水质数据的基础上,选择地下水中含量较高的K^(+)+Na^(+)、Ca^(2+)、Mg^(2+)、SO_(4)^(2-)、HCO_(3)^(-)、C1^(-)等6种常规离子作为判别因子,通过软件绘制Piper三线图,分析各含水层水化学特征。第四系地下水与二叠系砂岩裂隙水水化学类型相似,老空水与其他含水层水质差别较大。采用模糊综合评判、灰色关联度分析方法分别构建判别模型,判别准确率80%左右,对未知突水水源进行分析,结合矿井水文地质条件,判别突水来源于二叠系砂岩水。

For a long time,mine water disasters have seriously threatened the safe production of the mine.Rapid and accurate de-termination of mine water inrush source is the key to mine water disaster control.Upon collecting a large amount of water qual-ity data of various aquifers in the mine,six conventional ions such as K^(+)+Na^(+),Ca^(2+),Mg^(2+),SO_(4)^(2-),HCO_(3)^(-)and C1^(-)with high con-tent in the groundwater are selected as the discriminating factors.The water chemical characteristics of the aquifers are analyzed with computer drawn Piper three-line diagram.The basic hydrochemical type characteristics are studied of the main potential wa-ter filling sources such as quaternary water,Permian sandstone water and old air water.The results show that the hydrochemical type characteristics of Quaternary water are similar to that of Permian sandstone,and the characteristics of old air water are dif-ferent from other layers.Fuzzy comprehensive evaluation and grey correlation are applied to analyze,compare and determine the water inrush source by combining the hydrogeological conditions of the mine.The discrimination accurate rate is about 80%.