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马坑铁矿地下水流场变化特征与疏干防治对策
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摘要
福建马坑铁矿属水文地质条件复杂的顶板直接岩溶充水矿床,开采以来不断发生的岩溶水涌(突)水灾害严重制约着矿区安全生产。地下水流场的形态是矿区水文地质条件的综合反映,利用不同时期的岩溶水动态观测数据,绘制并分析了矿区多个时段岩溶水的流场形态,总结发现随着矿区岩溶水不断疏干,矿区岩溶水系统补给、径流与排泄更多受断层破碎带的控制,同时也因岩溶发育及岩性的不同而有所差异,地下水流场形态变化在空间上不仅没有很好的一致性,也明显地制约着矿区岩溶水的全面疏干。针对矿区流场形态变化的主控因素,提出了具有针对性的疏干防治对策。
        Makeng Iron Mine in Fujian belongs to a roof karst water-filled mine with complicated hydro-geological conditions.From mining start some years ago,sudden water inflow accidents constantly happened and have severely restricted the safety production.The groundwater flow field form mainly reflects the comprehensive hydro-geological condition.The paper adopted the karst water level data of different periods to draw and analyze the karst water flow field form in each period.It is summarized that with continuously dewatering of karst water,the recharge,runoff and discharge conditions of karst water system in Makeng mine is mainly controlled by the fault and also varied with karst development and lithology differences.And groundwater flow field form not only has no good consistency in space,but obviously restricts the overall dewatering of karst water in mine.For the main factors in variation of flow field form,a targeted dewatering countermeasure is proposed.
引文
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