矿区再造地下水环境渗流规律及防水工程可靠性分析

发布时间：2018-05-28 18:44

本文选题：大水矿山 + 渗流规律　；参考：《中南大学》2013年硕士论文

【摘要】：实现复杂水文地质条件下的安全采矿是目前大水矿山普遍面临的最大技术难题,为确保地下开采安全,必须科学深入地展开矿区水文地质规律及相关防治水工程技术研究,从而实现矿区地下水环境再造,有效控制地质灾害、遏止区域地下水位下降,维持地下水系统动态平衡。本论文以安徽省新桥矿露天转地下开采防治水工程项目为研究对象,综合运用实地监测、实体建模和数值模拟等手段,对再造矿区露天转地下前后渗流场分布规律及防水工程结构的适应性、可靠性进行研究,主要完成了以下工作： (1)系统开展区域工程水文地质调查,获得研究区域较为详细的水文地质数据。基于钻孔数据和GMS软件Solids等模块构建矿区水文地质结构模型,直观再现了研究区的真实地质环境,为下一步再造矿区水文地质概念模型的精细分区提供依据。 (2)运用解析法完成了露天坑降雨径流量及露天转地下开采井下涌水量的计算分析。分析结果表明：最大降雨径流条件下露天坑降雨量约为地下涌水量的26.8倍,防止地表水入渗和缩小入渗范围是再造矿区防治水的关键环节。 (3)基十等效连续介质数学模型,采用GMS软件建立研究区域的水文地质概念模型与数值模型完成了研究区域露天转地下开采前后的地下水渗流场分析,深入分析了开采扰动、地表降雨入渗等条件下研究区域的渗流分布规律,并对再造防水工程在露天转地下开采中的适应性做出了分析评价,再造防水工程在露天转地下开采一期工程中的截流作用较为明显。 (4)基于粗糙集与支持向量机理论建立再造防水工程可靠性评价模型,选取帷幕厚度、性状、渗透系数、岩体孔隙率、水力梯度、地下水水位降深、结石体强度、注浆深度等指标为评价因子,通过粗糙集知识约简提取核心判别指标,并利用支持向量机对样本数据和预测数据进行计算,得出再造防水工程的可靠等级。
[Abstract]:To realize the safety mining under complicated hydrogeological conditions is the biggest technical problem that the big water mines generally face at present. In order to ensure the safety of underground mining, it is necessary to carry out the research on the hydrogeological law of mining area and the related water control engineering technology scientifically and deeply. Thus the groundwater environment in mining area can be rebuilt, geological disasters can be effectively controlled, regional groundwater level will be restrained, and the groundwater system will be maintained in dynamic balance. This paper takes the project of water prevention and control from open-pit to underground mining in Xinqiao Mine of Anhui Province as the research object, and synthetically uses the means of field monitoring, solid modeling and numerical simulation, etc. The distribution law of seepage field and the adaptability and reliability of waterproof engineering structure before and after conversion from open air to underground in reclaimed mining area are studied. The main work is as follows: 1) to carry out the regional hydrogeological survey systematically and obtain the detailed hydrogeological data in the study area. Based on borehole data and GMS software Solids, the hydrogeological structure model of mining area is constructed, which directly reappears the real geological environment of the study area, and provides the basis for reconstructing the fine zoning of the hydrogeological conceptual model of mining area in the next step. 2) the calculation and analysis of the rainfall runoff in the open pit and the downhole inflow from the open pit to underground mining have been completed by using the analytical method. The results show that the rainfall in open pit is about 26.8 times of underground discharge under the condition of maximum rainfall runoff. Preventing surface water infiltration and reducing infiltration range are the key links of water control in reclaimed mining area. Based on the mathematical model of equivalent continuum medium, the hydrogeological conceptual model and numerical model of the study area are established by using GMS software. The seepage field of groundwater before and after the open pit to underground mining in the study area is analyzed, and the mining disturbance is deeply analyzed. Under the condition of surface rainfall infiltration and other conditions, the seepage distribution law of the area is studied, and the adaptability of the reengineering waterproof project in open-pit to underground mining is analyzed and evaluated. The reengineering waterproofing project has obvious effect on the closure of the first stage of open pit to underground mining. 4) based on rough set and support vector machine theory, the reliability evaluation model of reconstituted waterproof engineering is established. The curtain thickness, characteristics, permeability coefficient, rock mass porosity, hydraulic gradient, groundwater level depth, stone body strength are selected. By rough set knowledge reduction, the core discriminant index is extracted, and the sample data and prediction data are calculated by support vector machine, and the reliability grade of reengineering waterproof engineering is obtained.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TD745

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