江西崇义茅坪钨钼矿井突水灾害隐患分析及防治措施

通过对江西崇义茅坪钨钼矿水文地质条件和井巷疏排地下水现状的调查分析,根据矿区不同地段的矿坑充水条件,对地下水产生矿井突水的可能性进行了初步的分区评价,并为矿区地下水隐患的防治工作提出了一些措施建议.     

城门山铜矿二期露天坑地下水防治方案探讨

分析了矿区水文地质条件,建立了矿区水文地质概念模型,合理预测了矿坑地下水涌水量,通过经济、技术等多方面优缺点的比较,确定了采用疏堵结合方案作为矿区地下水主要防治方案。     

基于~(14)C测年在查明马坑铁矿矿区岩溶水来源中的应用

马坑铁矿属于水文地质条件复杂的岩溶充水矿床。地下水防治是矿区深部开采面临的首要难题,而查明矿区地下水来源是地下水防治的关键。本文以马坑铁矿为研究对象,采用~(14)C测年方法对矿区岩溶水来源进行了研究分析,并提出了相应防治水对策。     

阳山金矿床开采技术条件分析

对矿区地下水类型及补给、径流、排泄条件进行分析,确定了矿床水文地质条件和矿山开发用水源地;划分了矿区软弱类工程地质岩组,调查了矿区的环境地质情况,确定了矿区工程地质及环境地质条件。基本阐明了矿床的开采技术条件,为下一步矿山开发提供了参考。     

大排矿区水文地质条件分析

大排矿区为建筑用花岗岩,通过对矿区的水文地质条件调查,ZK403进行抽水试验,预测矿区涌水量,地下水进行水质分析,综合分析矿区的水文地质条件为简单。     

辽宁省营口市某铁矿水文地质条件研究

通过对辽宁省营口市某铁矿自然地理概况、矿区地形地貌特征,地下水径流、排泄条件、矿床水文地质特征等条件的分析,对矿坑涌水量等预测,评价矿区水文地质条件。分析矿区开采技术条件。     

辽宁省岫岩某金矿水文地质条件分析

通过对辽宁省岫岩县某金矿水文地质概况分析,地下水类型分析、补径排条件分析、矿坑涌水量、矿区供水水源等条件进行分析,评价矿区水文地质条件。分析矿区开采风险程度。     

德兴铜矿地下水资源初步分析

本文通过对德兴铜矿水文地质条件的分析,初步评价了矿区的地下水资源.     

罗南湖盆钾盐矿区水文地质特征及地下水系统分析

罗布泊盐湖位于新疆塔里木盆地东部,自1995年在罗布泊罗北凹地发现超大型钾盐矿床以来,罗布泊盐湖地质科学研究与资源调查进入了一个新阶段。为了提升罗南湖盆钾盐矿区地下水害的防治能力,减少矿区水害事故发生,将矿区的水文地质环境条件、地下水系统以及补给条件进行勘查,以便更好的预测矿井涌水量,防止矿井水害的发生。本文根据罗南湖盆钾盐矿区水文地质调查情况,就矿区水文地质特征、地下水系统补给和涌水量进行了勘查分析,以期为矿区钾盐开采提供一定的安全保障。     

黑龙江省逊克县高松山金矿床开采技术条件分析

通过对高松山金矿区地下水类型及补给、径流、排泄条件、充水因素等进行研究,确定了矿床的水文地质条件;根据不同围岩岩性的稳固性评价及矿区的地质地貌情况,对矿区的工程地质和环境地质条件进行了分析,基本阐明了矿床开采技术条件,为矿山的建设和开采提供了参考依据。     

金岭铁矿矿山防治水实践

矿山防治水工作对矿山开采及环境保护至关重要。多年来 ,山东金岭铁矿根据不同的水文地质条件分别采取疏干治水、综合治水等方法治理矿山地下水 ,实现了安全生产及保护地下水资源的良好治水效果     

银山铅锌矿采矿方法述评

本文简要地介绍了银山铅锌矿井下采矿方法，针对不同的采矿方法使用情况进行了评价．并就其存在的主要问题提出改进建议。     

矿井水资源优化配置的方案研究

针对传统矿井水资源配置方案中存在的供水量低,无法满足人们日常生活及工业生产的用水需求问题,开展对矿井水资源优化配置的方案研究,通过矿井水资源供需量计算及矿井水资源化配置模式的选择,找出最佳的矿井水资源配置方案。     

Softening Effects on Bearing Capacity of Mine Floors

A major cause for massive collapse of coal mines in the Illinois Basin is the softening of mine floors. Certain materials present in mine floors soften after coal extraction resulting in bearing capacity failure of coal pillars. The softening mechanisms considered in this study were (1) slaking∕swelling due to moisture exposure; and (2) creep or strain softening due to sustained loads. The effect of floor slaking or swelling on floor stability can be fairly dramatic. In some cases, shortly after pooling of water on the mine floor, collapse occurs resulting in surface subsidence. In other cases, the time factor is greater. The effect of softening on the ultimate bearing capacity of the mine floor was assessed by modeling representative conditions using FEM and elastoplastic elements. In the models, the properties of softened mine floors were determined from results from subsurface exploration work in floor areas that were stable and others that had failed. The zone of softening was evaluated by stress-field analysis.     

Long-Term Behavior of Fixated Flue Gas Desulfurization Material Grout in Mine Drainage Environments

In this research, we examine the long-term ( ～ 4 years) behavior of fixated flue gas desulfurization (FGD) material grout following placement within the Roberts–Dawson underground coal mine. Surface water and groundwater samples were collected to examine the impact of grouting on water quality, and core samples were obtained to assess the geochemical stability of the grout material. Surface water samples collected from the main seep at the Roberts–Dawson mine indicated that 4 years after grout placement the long-term fluxes of acidity, iron, sulfur, and calcium were slightly elevated compared to pregrout conditions. The long-term discharge of these constituents was likely due to continued dissolution of grout material (for Ca and S) as well as changes in flow paths and subsequent solubilization of metal salts accumulated within the mine voids (for acidity, Fe, Al, and S). Although the fluxes of these elements were elevated, no measurable deleterious impact was observed for the underlying groundwater or adjacent surface water reservoir. Groundwater samples collected from monitoring wells installed within the grout material indicated that acid mine drainage waters were neutralized by the grout material. Mineralogical analyses demonstrated minimal penetration of mine drainage water into the high strength fixated FGD material grout, and little weathering of the material was observed. These data indicate that the high strength fixated FGD material grout injected into the Roberts–Dawson mine was geochemically stable and could locally neutralize mine drainage waters. However, more complete grouting and more extensive mine flooding is likely needed in order to bring about significant improvements in seep water quality.     

Hydrologic and Geochemical Factors Governing Chemical Evolution of Discharges from an Abandoned, Flooded, Underground Coal Mine Network

Discharges from some underground flooded coal mines have exhibited increases in pH and reductions in contaminant loadings with time. Data from a study of mine water quality evolution in interconnected, flooded mines of the Uniontown syncline, Southwestern Pennsylvania were evaluated with the aid of modeling to elucidate the hydrologic and geochemical factors responsible for such changes. Coal barriers left in place from mining operations define three hydraulically distinct but interconnected zones: the southern, central, and northern pools. Assuming each mine pool to behave as a completely mixed tank reactor, a steady-state, tanks-in-series model was developed to describe system hydraulics. Chemical modeling components were coupled with the tank reactor hydraulic model to simulate inputs to the mine voids, acid generation from pyrite dissolution, and discharge water quality. Empirical in-mine chemical production terms were estimated for each of the mine pools based on discharge data from 1974 to 1975 and 1998 to 2000. The production terms were then used to simulate discharge water quality for each of the mine pools over a 50?year period. Simulated water quality in the northern and central mine pools reached steady-state conditions approximately 25–30?years after the mine pools flooded, evolving over time to reflect the recharge water quality. The simulation results indicate that the evolution of mine water quality in the flooded mine voids has been governed by alkaline recharge water slowly displacing acidic “first flush” water.     

辽宁平房金矿矿井防治水害技术

介绍了平房金矿的基本情况和发生透水事故的教训,分析了水害形成的原因,提出了预防水害的方法,指出预防水害的重要性。     

德兴铜矿绿色矿山建设对矿山高质量发展的作用

矿山的开采产生了大量的废石和尾矿,对周围的环境造成了一定的影响。随着矿山进入凹陷开采,开采难度将不断增大。为深入贯彻落实创新、协调、绿色、开放、共享的发展理念,德兴铜矿遵循因矿制宜的原则,从环境治理、资源综合利用、节能减排、科技攻关与数字化矿山建设四大方面着手,全面建设国家级绿色矿山,大大提升了矿山的生产技术水平,推动了矿山技术的转型升级,有效提高了矿山资源的综合利用,实现了德兴铜矿的高质量绿色矿山发展。     

滨海矿山矿坑涌水源识别与混合比研究

通过水化学和同位素分析,并利用主成分分析法（PCA）确定了三山岛金矿西山矿区井下巷道的涌水来源为海水、375-20（Mg）、淡水和320-7（Ca）,其中375-20和320-7均为基岩水,但其水化学特征明显不同,前者是富Mg型基岩水,而后者是富Ca型基岩水。据此建立了巷道涌水的混合模型,在此基础上结合极大似然法计算得到巷道涌水混合比,分析其演化规律。研究表明：该方法能够有效识别涌水来源,并计算水样混合比;海水在各端元中占比最大,是混合水的主要成分,各期水样海水比例在50%左右波动;海水比例较高的中段为-510 m中段,在此中段处于1660和2230勘探线之间的水点,各期海水比例大于50%,尤其是510-2水样点,海水比例最高达到77%;淡水主要影响范围是-465 m及以上中段;F3断裂带受采动影响较大,其周围的水样点海水比例波动大,需加强对该断裂带的监测。     

武山铜矿深部矿坑涌水量预测

武山铜矿位于九江——瑞昌褶皱带北部,横立山——黄桥向斜北翼东段,属于长江南岸丘陵～湖泊过渡地带,矿床分为南、北两个矿带,主要矿体埋均藏于当地侵蚀基准面以下,三叠系至石炭系灰岩溶洞裂隙水为矿床直接充水水源,富水性中等～强,断裂构造较发育,部分断裂导水性较好,水文地质条件属于复杂类型。在分析矿区含隔水层、矿区断裂构造及矿区补、排水文地质特征的基础上,进一步总结大气降水与坑道涌水量动态变化规律,分别采用水文地质比拟法与数值模型法进行了涌水量预测,预测结果误差小,能满足预测精度要求,可为矿山排水设施设计及深部防治水工作提供帮助。