皖北矿区地下水稀土元素地球化学特征研究

发布时间：2018-12-10 20:01

【摘要】：矿井突水是煤矿开采中经常遇到的地质灾害,严重威胁着煤矿的安全生产。为了快速判别突水水源,利用皖北宿(县)—临(涣)矿区生产矿井地面水位长期观测孔、井下放水孔以及井下出水点等处分别取新生界第四含水层、煤系砂岩裂隙含水层、石炭系太原组岩溶含水层及奥陶系岩溶含水层的42个稀土元素水样。采用现代统计学中的因子分析方法对矿区稀土元素的水文地球化学特征进行研究。提取了两个特征值大于1的公因子,两个因子的累计方差贡献率达到了93.055%,能够较全面的解释宿-临矿区大部分含水层的水化学信息;建立了用稀土元素作为分析变量判别突水含水层水源的Bayes模型,判别率高达93%,判别结果与因子分析结果相符。研究成果为煤矿开采中的突水水源判别提供了新的科学依据。
[Abstract]:Mine water inrush is often encountered in coal mining geological disasters, which seriously threaten the safety of coal production. In order to quickly distinguish the source of water inrush, the long term observation hole of mine surface water level, the underground discharge hole and the point of downhole water outlet are used to select the fourth aquifer of the Cenozoic and the fractured aquifer of the sandstone of coal series respectively in Su-Linhuan mining area of northern Anhui Province. Water samples of 42 rare earth elements in Carboniferous Taiyuan formation karst aquifer and Ordovician karst aquifer. The hydrogeochemical characteristics of rare earth elements in mining areas were studied by factor analysis in modern statistics. Two common factors whose eigenvalues are greater than 1 are extracted, and the cumulative variance contribution rate of the two factors reaches 93.055, which can fully explain the hydrochemical information of most aquifers in Shu-Lin mining area. In this paper, a Bayes model for judging water source of water inrush aquifer by using rare earth elements as analytical variable is established. The discriminant rate is as high as 93%, and the result is in agreement with the result of factor analysis. The research results provide a new scientific basis for the discrimination of water inrush in coal mining.
【作者单位】：合肥工业大学资源与环境工程学院;
【基金】：国家自然科学基金资助项目(41372244)
【分类号】：P641.4;TD745

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