云南罗平某煤矸石场淋滤水中的Mn在石炭系石灰岩中的运移规律研究

发布时间：2018-05-28 14:29

本文选题：煤矸石 + 淋滤水　；参考：《昆明理工大学》2017年硕士论文

【摘要】：煤矸石是煤矿开采过程中产生的固体废弃物,如果没有采取防护措施,大量裸露堆积地表,有害物质会通过溶解作用、淋滤作用方式进入地下水,污染周围区域的地下水环境。本论文结合实际项目《阿岗水库工程地下水环境影响评价》,对阿岗水库集水区内的煤矸石场石炭系石灰岩淋滤水Mn的运移规律进行研究。本文在收集已有相关资料的基础上,通过大量的野外勘察和水文地质调查,系统阐述煤矸石场所在区域的地质和水文地质条件。对研究区的岩溶洼地和裂隙数据进行统计和分析,得出渗透张量各主值之间存在的线性关系。室外进行抽水试验和弥散试验,室内进行水样和渣样检测,获取渗透系数、弥散系数和降雨入渗系数等相关水文地质参数。将篆长河水文地质单元隔水边界圈围的潜水含水层作为模型研究区域,建立水文地质概念模型和地下水水流模型。利用长期观测的水位数据和水均衡数据对模型进行识别与校验。挑选Mn作为示踪因子,建立Mn粒子的运移模型。煤矸石场于2011年堆渣,2015年进行渣样和水样的监测。选取枯水期的地下水水样,采用单项和综合指数法分别评价各钻孔的水质。运用GMS7.1中的MT3DMS模块模拟从堆渣开始到检测期间1200天Mn的运移,利用钻孔检测Mn的浓度进行拟合检验,对横向和纵向弥散系数之比进行不确定性分析。分析研究渗透张量和弥散度对石炭系石灰岩淋滤水Mn的运移方向、范围和浓度变化规律的影响。
[Abstract]:Coal gangue is a kind of solid waste produced in the process of coal mining. If no protective measures are taken, a large number of exposed and accumulated surface, harmful substances will enter groundwater through dissolution and leaching, and pollute the groundwater environment in the surrounding area. Combined with the actual project "groundwater environmental impact assessment of the Agang Reservoir Project", this paper studies the migration law of mn in Carboniferous limestone leaching water of coal gangue quarry in the catchment area of Agang Reservoir. On the basis of collecting relevant data, this paper systematically expounds the geological and hydrogeological conditions of coal gangue sites in the region through a large number of field surveys and hydrogeological surveys. The data of karst depressions and fractures in the study area are statistically analyzed and the linear relationship between the principal values of permeable Zhang Liang is obtained. Outdoor water pumping test and dispersion test, indoor water sample and slag sample detection, obtained permeability coefficient, dispersion coefficient and rainfall infiltration coefficient and other relevant hydrogeological parameters. The hydrogeological conceptual model and groundwater flow model were established by taking the aquifer confined by the hydrogeological unit of Zhuan Changhe River as the research area. The model is identified and calibrated by using long-term observed water level data and water balance data. The migration model of mn particles was established by selecting mn as tracer factor. The coal gangue site was built in 2011, and the slag and water samples were monitored in 2015. The water quality of each borehole was evaluated by single and comprehensive index method. Using the MT3DMS module in GMS7.1 to simulate the migration of mn from the beginning of the heap slag to the detection period of 1200 days, the concentration of mn detected by borehole is tested by fitting test, and the uncertainty analysis of the ratio of transverse and longitudinal dispersion coefficient is carried out. The effects of permeation Zhang Liang and dispersion on the migration direction, range and concentration of mn in limestone leaching water of Carboniferous are analyzed and studied.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X752;X523

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