高村铁矿露天采场地下水疏干预测及疏干工艺研究

发布时间：2018-08-26 15:53

【摘要】：本文介绍了国内外矿坑涌水量预测研究的基本情况,总结了目前矿山防治水的主要措施,在此基础上展开了高村露天采场疏干及防排水工艺的研究。文中分析了高村铁矿矿区的地质及水文地质特征,结合现场水文地质调查、节理统计、抽水试验及降雨资料的收集,将矿区的含水层概化为一个基岩裂隙含水介质系统,利用矿坑疏干涌水量资料和地下水动态长期观测资料,建立了高村矿区地下水非承压水流数值模型。水流模型经过参数识别和验证,得到了比较理想的模拟效果,这也保证了利用模型来预测未来矿坑疏干涌水量的可信度。在地下水水流模型的基础上,按照高村采场的开采计划,分别设计并建立了基于防渗帷幕截流、坑外井群排水和地下聚水廊道集中排水三种方法的地下水疏干预测模型,模拟了这三种方案在采场的疏干情况。从施工工艺及疏干效果的角度,论证并否定了井群排水与防渗帷幕截流这两种方案在高村采场的适用性。围绕聚水廊道排水疏干方法,对其在本矿区建设实施的优点进行了分析,并论述了聚水廊道系统的构筑设想最后,以聚水廊道疏干系统为参考,引入水平孔取水技术,提出了水平辐射井疏干的方案。对比了聚水廊道疏干方法和水平辐射井疏干方法的优缺点,总结了后者的优势。此外建议在高村采场开展必要的相关试验后,将水平辐射井疏干方案正式应用于矿坑疏干排水。
[Abstract]:This paper introduces the basic situation of the research on the prediction of mine water inflow at home and abroad, summarizes the main measures for preventing and controlling water in mines at present, and on the basis of this, studies the drainage and drainage techniques of the open-pit stope in Gaocun. In this paper, the geological and hydrogeological characteristics of Gaocun Iron Mine are analyzed. Combined with field hydrogeological investigation, joint statistics, pumping test and rainfall data collection, the aquifer in the mining area is generalized as a water-bearing medium system of bedrock fissure. A numerical model of unconfined groundwater flow in Gaocun mining area is established based on the data of drainage discharge of mine pit and long-term observation data of groundwater dynamics. Through parameter identification and verification, the water flow model is proved to be effective, which also ensures the reliability of the model to predict the future mine drainage discharge. On the basis of groundwater flow model, according to the mining plan of Gaocun stope, a groundwater drainage prediction model is designed and established based on three methods: closure of seepage curtain, drainage of wells outside the pit and centralized drainage of underground waterways. The drying of the three schemes in the stope is simulated. From the point of view of construction technology and draining effect, the applicability of the two schemes of well group drainage and impervious curtain closure in Gaocun stope is proved and denied. In this paper, the advantages of water gathering corridor drainage and drying method are analyzed, and the construction idea of water accumulation corridor system is discussed. Finally, the horizontal hole water intake technology is introduced with the reference of water gathering corridor drainage system. The scheme of draining horizontal radiation well is put forward. In this paper, the advantages and disadvantages of water gathering corridor drying method and horizontal radiation well drying method are compared, and the advantages of the latter are summarized. In addition, it is suggested that the horizontal radiation well drainage scheme should be formally applied to dry drainage of mine pit after the necessary relevant tests are carried out in Gaocun stope.
【学位授予单位】：南京大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TD745

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