共查询到19条相似文献，搜索用时 296 毫秒
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从水文地质条件、充水情况等方面研究影响司家营铁矿Ⅲ采场地下水涌水量因素;在矿区水文地质条件的基础上,进行了矿区地下水均衡计算,通过矿区地下水影响因素的综合分析,计算出矿区地下水总补给量和总排泄量,得出两者的平衡关系;分别采用大井法及数值模拟法,对司家营铁矿Ⅲ采场露天转井下深部开采不同中段的地下水涌水量进行计算,并结合自然降水和考虑露天采场回填废石影响,系统预测了不同开采中段矿坑总涌水量。研究成果表明,矿区地下水呈负均衡状态,对矿区开采呈有利态势;矿坑系统涌水量综合预测结果与阶段性的实测资料较为一致,为司家营铁矿Ⅲ采场井下防排水及地质环境保护奠定了基础。 相似文献
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《水文地质工程地质》2014,(2)
从水文地质条件、充水情况等方面研究影响司家营铁矿Ⅲ采场地下水涌水量因素;在矿区水文地质条件的基础上,进行了矿区地下水均衡计算,通过矿区地下水影响因素的综合分析,计算出矿区地下水总补给量和总排泄量,得出两者的平衡关系;分别采用大井法及数值模拟法,对司家营铁矿Ⅲ采场露天转井下深部开采不同中段的地下水涌水量进行计算,并结合自然降水和考虑露天采场回填废石影响,系统预测了不同开采中段矿坑总涌水量。研究成果表明,矿区地下水呈负均衡状态,对矿区开采呈有利态势;矿坑系统涌水量综合预测结果与阶段性的实测资料较为一致,为司家营铁矿Ⅲ采场井下防排水及地质环境保护奠定了基础。 相似文献
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峰峰五矿底板突水数值模拟及涌水量预测 总被引：4，自引：2，他引：2
利用峰峰五矿的突水资料进行了矿区地下水数值模拟和矿井涌水量预测。首先,根据水文地质条件,建立矿区地下水渗流的数学模型。然后,运用突水资料对模型进行检验,模型检验中各观测孔的实测水位与模拟水位拟合较好。最后,利用所建模型进行矿坑涌水量预测,结果表明,-100m水平以下煤层的开采,矿坑涌水量大,开采成本较高。 相似文献
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针对重新集铁矿水文地质条件深入研究,对其进行相应概化,利用解析法以及数值法(分不同开采方案)进行矿坑涌水量预测,得出结论:解析法在矿坑涌水量中局限较大,在矿坑预测过程中更为推荐使用数值法,其预测结果与实际结果更为符合。从具体预测结果来看,最大矿坑涌水量均出现在首采阶段,而在全开采期矿坑涌水量总体变化不大。选择优先开采-160 m水平矿体和-300 m水平矿体两种不同的开采方案时,方案二的最大涌水量较小,有益于井下最大排水规模的控制,同时发现涌水量变幅也相对较平稳,有益于矿山水资源综合利用方案制定和矿山水环境治理方案的设计,建议矿床开采方案选择方案二。 相似文献
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复杂岩溶矿区疏干条件下的地下水数值模拟——以福建省马坑铁矿为例 总被引：2，自引：1，他引：1
由于岩溶含水介质的空间不连续性及空间异性,复杂岩溶矿区含水介质的概化及涌水量预测一直都是地下水数值模拟的难点.本文以马坑铁矿为例,对复杂岩溶矿区疏干条件下的介质概化进行了研究,以此构建了地下水流数值模拟模型,并利用地下水位动态及涌水量资料对模型进行识别和验证,然后分别对矿区未来+100 m、0 m开采水平的矿坑涌水量进行了预测,结果表明:+100 m、0 m开采水平的矿坑涌水量分别为36 900 m3/d、38 250m3/d,可见目前矿区疏干仍面临较大压力,应尽快采取多种措施以降低地下水位,保证采矿安全. 相似文献
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矿井突水是矿山开采过程中最具威胁的自然灾害之一,其中以岩溶水突水最为常见。大藤峡水利枢纽蓄水后,抬高了盘龙铅锌矿附近黔江的地表水位。矿山继续向深部开采,矿坑涌水危险进一步增加。文章基于Visual Mod Flow地下水流数值模拟软件,建立盘龙铅锌矿大岭矿段的数值模型,采用矿坑涌水量实测值以及多种矿坑涌水量计算方法对数值模型进行校验。通过模拟计算,预测大藤峡水利枢纽蓄水后对不同开采中段矿坑涌水量将会明显增加。为了降低矿坑涌水量,建议在黔江河近岸的3个倒灌口各建1个挡水坝,在大岭矿段东侧和西侧各施工1道灌浆帷幕。当帷幕体透水率为3 Lu时,止水效果可达44.21%~53.14%。 相似文献
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丘陵地区地下水资源不丰富,依赖于地下水的生态环境也比较脆弱。在开采该地区的矿产资源过程中,采矿排水对周边地下水资源的影响应成为值得注意的问题。以安徽省庐江县某一铁矿为例,采用解析法和数值法分别对该矿矿坑涌水量进行预测,并将两种方法的预测结果进行了对比分析。结果表明：在-500 m开采条件下,计算结果分别为41991．44 m3/d和3150 m3/d,得出数值法更适合水文地质复杂条件下矿坑用水量的预测,且与实测结果较为吻合,具有一定实用性,可为矿山制定防排水方案提供依据。 相似文献
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Numerical simulation of groundwater in karst areas has long been restricted by the difficulty of generalizing the hydrogeological conditions of reservoirs and of determining the relevant parameters due to the anisotropy and discontinuity of the karst water-bearing media in these areas. In this study, we used the Guang’an Longtan Coal mine in Sichuan as an example, and generalized the complex hydrogeological conditions in the reservoir area. A finite element numerical flow model was used to simulate current and future scenarios of roadway gushing at the bottom of the coal mine at pile number 1 + 700 m. The results show that the roadway section corresponding to valleys has a gushing quantity of 4323.8–4551.25 m3/d before impoundment. Modeled water inflow after impoundment increased to 1.6 times the water inflow before impoundment, which threatens the impoundment as well as the roadway’s normal operation. Therefore, roadway processing measures are needed to guarantee the safety of the impoundment and of the mining operation. 相似文献
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我国许多煤矿区,由于地下水频繁突入,造成淹井或因突水威胁使大量煤炭资源难以开发。因此,准确预测矿井涌水量,为矿井防治水提供依据,对煤矿床安全开采和长远发展至关重要。以宁东煤炭基地麦垛山煤矿为例,采用解析法、水文地质比拟法和三维渗流数值法等六种预测方法,对该煤矿11采区110203、110208工作面2#煤顶板直罗组底部砂岩含水层进行了涌水量预测。通过各种方法的分析比较,最后推荐采用最小二乘比拟法预算结果做最终矿井涌水量。 相似文献
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结合甘肃省灵台县安家庄煤矿地下水环境影响评价实例,建立了评价区水文地质概念模型,并基于Visual MODFLOW对评价区地下水进行了数值模拟计算和验证;预报了设计开采条件下研究区不同含水层的地下水水位。预报结果表明:矿坑排水使得煤层所在含水层出现疏干现象,并且疏干范围随着开采范围的增加而不断扩大;在煤矿开采作用下,随着模拟时间的延续,煤系层上覆白垩系洛河组—宜君组含水层地下水位降落漏斗的范围及地下水位下降幅度不断增大,但降落漏斗的范围基本上不超过采空区范围;煤矿开采对白垩系环河组含水层无影响,至矿区开采期结束,未引起含水层水位下降;对上部孔隙、裂隙潜水含水层也无影响,至矿区开采期结束未引起含水层水位下降。 相似文献
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《Geomechanics and Geoengineering》2013,8(3):189-199
Numerical models are useful in the evaluation of the interaction between groundwater systems and mining activities. They can be successfully used to predict the quantity of inflow into open pits and to design an appropriate dewatering system. In this paper, a two-dimensional axi-symmetric finite element model called SEEP/W has been used to predict the groundwater inflow into Sangan open pit mine (anomaly north C). The Sangan iron mine is located at 280 km south-east of Mashhad, Iran, in arid and warm climate conditions wherein precipitation is generally limited. The water inflow to the pit is mainly from a confined aquifer, mainly by horizontal flow in the upper layers and vertical flow at the pit bottom. The results of the numerical model of the ground water inflow are presented and compared with those obtained from Theis, Cooper-Jacob and Jacob-Lohman analytical solutions. Ground water inflow monitoring was also carried out in a trial excavation at the Sangan mine in order to calibrate the model. The model was then used to predict groundwater inflow into Sangan open pit mine during its advancement. This model provides valuable information for designing an appropriate dewatering system. 相似文献
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煤矿水害防治技术的现状及发展趋势 总被引：5，自引：0，他引：5
全面阐述了我国煤矿水害防治技术的现状，包括水文地质条件探查技术、突水预测技术和水害治理技术；预测了防治水技术发展趋向，如计算机信息技术的应用，水害发生机理的理论与实验，预测技术的开发与仪器化，开发新仪器、设备、方法的推广应用、地下水流模型、水资源管理信息系统的开发与应用等。 相似文献
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This study develops a three-dimensional heterogeneous numerical model to simulate the water inrush process and predict the water yield for mineral exploration in Yangzhuang Iron Mine in Anhui Province. To identify the hydrogeological parameters of the aquifer in the study area, the model was calibrated and validated using the observed heads through the integrated trial-and-error and automated techniques. Also, the sensitivity analysis of the model was performed to evaluate the uncertainty associated with the calibrated model. According to the mine construction plan at different mining levels of -500 m, -600 m, and -700 m, the calibrated model was then applied to predict the water yields dependent on the different mining levels. As indicated by the prediction results, the numerical simulation model can systematically describe the groundwater system in the mining area and determine the source of water inrush in this iron mine. In conclusion, numerical analyses carried out in this study can provide guidance to decision-makers in balancing the iron ore mining and mine dewatering in the future. 相似文献
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为抑制疏干排水造成的地下水水资源量衰减,并控制露天煤矿煤炭开采对地下水资源的影响范围,采用了水帷幕保水采煤技术。以某露天煤矿为背景,建立沙槽回灌平台进行物理实验,再通过数值方法对回灌区进行模拟计算,分析疏干–回灌水帷幕的形成和变化规律。物理实验方法观察到回灌水帷幕形成定水头边界,阻止漏斗扩展的过程,获得不同回灌水帷幕水头高度对注水量的影响和注水量与排泄量平衡的最佳水头。数值模拟获得物理模拟类似的结果,回灌水帷幕位置可以有效限定疏干降落漏斗范围,回灌水帷幕定水头高度与疏干区水位和疏干时间正相关;最大回灌量受帷幕定水头高度影响显著;回灌水帷幕距离采坑越远对阻隔帷幕外水源补给的作用越大。物理模拟和数值模拟表明,改变回灌水帷幕的位置或水头高度都可以使得矿坑的排水量与帷幕的注水量相等,这就可以最大限度减少疏干水的外排水量。研究表明,疏干–回灌水帷幕可望成为我国露天煤矿区保水采煤的实用模式。 相似文献
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This paper compares analytical and numerical methods by taking the forecasting of water yield of deep-buried iron mine in Yanzhou, Shandong as an example. Regarding the analytical method, the equation of infinite and bilateral water inflow boundary is used to forecast the water yield, and in the case of numerical simulation, we employed the GMS software to establish a model and further to forecast the water yield. On the one hand, through applying the analytical method, the maximum water yield of mine 1 500 m deep below the surface was calculated to be 13 645.17 m3/d; on the other hand, through adopting the numerical method, we obtained the predicted result of 3 816.16 m3/d. Meanwhile, by using the boundary generalization in the above-mentioned two methods, and through a comparative analysis of the actual hydro-geological conditions in this deep-buried mine, which also concerns the advantages and disadvantages of the two methods respectively, this paper draws the conclusion that the analytical method is only applicable in ideal conditions, but numerical method is eligible to be used in complex hydro-geological conditions. Therefore, it is more applicable to employ the numerical method to forecast water yield of deep-buried iron mine in Yanzhou, Shandong 相似文献