安徽泥河铁矿矿坑充水因素研究
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摘要
安徽泥河铁矿矿区水文地质条件较复杂,矿体埋深大,在综合分析矿区水文地质条件、地表水、地下水相互水力联系的基础上,从岩层性质、地下水赋存及补给条件,确定了影响矿床充水的各因素,结果可知:泥河铁矿矿体埋藏深度大,顶底板围岩为隔水层,次生石英岩含水层为矿坑充水的主要间接补给源,其多位于矿体顶板之上50 m,受矿体上部导水性极弱的闪长玢岩层的限制,补给量微弱,对矿区大部分矿坑充水影响不大。但在矿区东北部和中部地段,受开采时冒落带以及导水裂隙带的影响,对该区域矿坑充水的影响较大。此次研究填补了该矿区深层地下水含水系统研究的空白,为准确预测矿坑涌水量提供理论依据,具有重要的参考价值和现实意义。
The hydrogeological conditions of the Nihe Iron Ore Mine in Anhui Province are complex andthe body is buried deep. Based on a comprehensive analysis of the hydrogeological conditions, surface water and groundwater hydraulic relations of the mining area, the properties of the rock formation, the occurrence of groundwater and the recharge conditions are determined. The factors affecting the water filling of the deposit are as follows: the burial depth of the Nihe iron ore body is large, roof and floor surrounding rock is aquifer, and the secondary quartzite aquifer is the main indirect recharge source for the water filling of the pit, which is mostly them are 50 m above the roof of the ore body, limited by the diorite-bearing rock layer with extremely weak water conductivity in the upper part of the ore body, the recharge amount is weak, and it has little effect on the filling of most mine pits. However, in the northeast and central sections of the mining area, the influence of the caving zone and the water-conducting fissure zone during mining has a greater impact on the filling of the pit. This study fills the gap in the study of deep groundwater aquifer system in the mining area, and provides a theoretical basis for accurately predicting the amount of water in the pit. It has important reference value and practical significance.
The hydrogeological conditions of the Nihe Iron Ore Mine in Anhui Province are complex andthe body is buried deep. Based on a comprehensive analysis of the hydrogeological conditions, surface water and groundwater hydraulic relations of the mining area, the properties of the rock formation, the occurrence of groundwater and the recharge conditions are determined. The factors affecting the water filling of the deposit are as follows: the burial depth of the Nihe iron ore body is large, roof and floor surrounding rock is aquifer, and the secondary quartzite aquifer is the main indirect recharge source for the water filling of the pit, which is mostly them are 50 m above the roof of the ore body, limited by the diorite-bearing rock layer with extremely weak water conductivity in the upper part of the ore body, the recharge amount is weak, and it has little effect on the filling of most mine pits. However, in the northeast and central sections of the mining area, the influence of the caving zone and the water-conducting fissure zone during mining has a greater impact on the filling of the pit. This study fills the gap in the study of deep groundwater aquifer system in the mining area, and provides a theoretical basis for accurately predicting the amount of water in the pit. It has important reference value and practical significance.
引文
[1]安徽省地质调查院.安徽省庐江县泥河铁矿详细勘探地质报告.2009.
[2]曹建峰,等.专门水文地质手册[M].中国科学技术出版社.2007.
[3]严如隧,等.安徽省罗河铁矿详细地质勘察报告.1976.
[2]曹建峰,等.专门水文地质手册[M].中国科学技术出版社.2007.
[3]严如隧,等.安徽省罗河铁矿详细地质勘察报告.1976.