高密度电法不同装置的勘探效果对比观察

在工程地质探察、地球物理探查等领域,高密度电法由于其自身高效快捷的优势,受到了广泛应用,成为重要的勘探方法之一。在高密度电法应用中,通过改变电极的排列方式,可以得出不同的工作装置类型。在实际测量过程中,应根据情况选择不同类型的高密度工作装置,以获得最佳效果。本文通过建立模型进行实验,对比了高密度电法不同装置的勘探效果,得出了相关结论,为高密度电法装置的选择提供一定帮助。     

高密度电法不同装置的勘探效果对比观察

在工程地质探察、地球物理探查等领域,高密度电法由于其自身高效快捷的优势,受到了广泛应用,成为重要的勘探方法之一。在高密度电法应用中,通过改变电极的排列方式,可以得出不同的工作装置类型。在实际测量过程中,应根据情况选择不同类型的高密度工作装置,以获得最佳效果。本文通过建立模型进行实验,对比了高密度电法不同装置的勘探效果,得出了相关结论,为高密度电法装置的选择提供一定帮助。     

高密度电法在巴彦查干金矿区的应用及找矿模型的建立

高密度电法仪能够进行激发极化测量,可以同时获得电阻率和充电率参数。通过在内蒙巴彦查干金矿区的工作实例,研究建立了高密度电法在该区的找矿模型:高密度电法测量的电阻率参数,用以划分石英闪长岩与黑云母的接触部位,此部位正是成矿有利部位;再应用充电率参数圈定矿化部位。经钻探施工,验证找矿效果较好。     

内蒙古大兴安岭加疙瘩物化探异常及资源潜力评价

研究区位于我国重要的金、铜、铅、锌等多金属成矿区,在分析研究区地质、物化探特征的基础上对研究区资源潜力进行评价.研究区矿化程度较低,加之深部没有控制.首先应加强区域性构造的研究,研究区域构造格架,建立区域构造体系,对控矿构造进行理定.采用构造地质法、原生晕地球化学方法、高密度电法测量等综合方法进行研究区资源潜力的评价....     

高密度电法在岩溶勘察中的应用

近几年来,国家大力发展电网工程,各种规模的电压等级都有,很多输电线路都通过灰岩分布区,灰岩分布区易发生地面塌陷等地质灾害,物探和钻探相结合是岩溶勘察中的重要手段。高密度电法兼具电阻率剖面法与测深法的功能,其数据采集密度大、精度高的断面测量结果能较直观地反映地层及电性异常体的形态及纵、横向展布情况。本文介绍了高密度电法的原理与野外工作方法,通过应用实例说明高密度电法在输电线路中岩溶勘察中的作用。     

矿山地质勘查工作中高密度电法的应用实践分析

高密度电法是矿山地质勘查中的重要环节。针对高密度电法在矿山地质勘查当中所运用的基本理论、工作特点、使用范围等进行分析和研究,不断生化高密度电法的实践深度,完善高密度电法的相关理论体系。高密度电法矿山地质勘查当中不断深化发展,可以有效提高工作效率,提高勘查质量,降低勘查成本,从而提高相关部门或者矿山企业的经济收入。     

地球物理勘探在寻找临沂小黄山地区地热资源中的应用

本次工作通过可控源法测量、瞬变电磁测深法测量、视电阻率垂向测深法测量查明普查区内地层构造,确定了区内主要断裂构造的位置及产状,初步了解了主要断裂构造破碎带发育程度及规模,为该地区地热资源开发提供了地球物理依据。     

高密度电法在探测隐伏岩性分界面中的应用

高密度电法是工程地质勘查中较为常用的一种物探方法,具有分辨率高、工作效率高、自动化程度高和异常特征明显等特点,因此在岩溶勘查、确定第四系覆盖层的厚度、寻找地下水等领域均有比较广泛的应用。本文结合实际的工程实例,从高密度电法的原理着手,对确定第四系覆盖层与基岩分界面的探测中高密度电法的应用的可行性进行了分析,并通过与钻探成果进行比较,探讨灰岩地区探测隐伏岩性分界面的埋深调查工程中高密度电法的可靠性。     

地球物理勘探在寻找临沂小黄山地区地热资源中的应用

本次工作通过可控源法测量、瞬变电磁测深法测量、视电阻率垂向测深法测量查明普查区内地层构造,确定了区内主要断裂构造的位置及产状,初步了解了主要断裂构造破碎带发育程度及规模,为该地区地热资源开发提供了地球物理依据。     

高密度电法在石材矿探测中的应用

针对石材矿勘探和开发中存在的矿体边界确定、石材完整性判别等实际难题,首次将高密度电法技术引入到石材矿探测中,在新疆哈密黄山南黑冰花型石材矿开展了探测研究.通过改造测线布置方法、优选装置,获取了高分辨率的测量数据;进行二维反演和三维电阻率成像反演.实现了三维电阻率数据.体在三维可视化环境下的交互式显示和操作;结合地质资料,完成了对石材矿的探测解释及评价.结果表明:高密度电法能清晰地刻画出具有高电阻率特征的石材矿矿体三维空间形态,对影响石材矿质量的风化层、裂隙构造等不利因素有较强的识别能力.     

综合物探手段在前道矿山勘查中的应用

介绍了高精度磁法测量和高密度电阻率法测量的原理,并将其应用在前道矿山勘查中。通过对数据解译圈定构造断裂两条,为矿区深部找矿提供了指导。为下一步勘探工作提供了依据。     

Dry slipping steel–steel contact at high current density

The behavior of steel 3 in dry slipping under the action of high-density electric current is studied. In these conditions, the surface layer undergoes plastic deformation; its temperature rises; and new phases and structural defects are formed. That gives rise to a layer of secondary structures. The basic factor disintegrating the surface layer is the contact current density. The mean contact temperature and layer thickness of the secondary structures increase with increase in current density. The variation in wear rate and electrical conductivity with change in contact temperature is studied. The wear rate depends linearly on the contact temperature in normal wear. Catastrophic wear appears as sharp increase in the wear rate and simultaneous decrease in the contact electrical conductivity at 500—600°C. The thickness of the layer of secondary structures is 50 μm in these frictional conditions.     

Three-dimensional electrical resistivity imaging of a gold heap

A case study is presented for an electrical resistivity geophysical survey, conducted on a gold leach pad of low-grade ore. The electrical resistivity method maps the spatial distribution of electrical resistivity, which is an intrinsic property of material that measures the resistance of electrical current flow through a medium. The property is influenced by moisture content, ionic strength of the porewater, and mineralization. The geophysical method was applied to the leach pad to discern patterns of high and low moisture from past infiltration into the heap. A total of 12 survey lines were run in parallel over an 8 ha portion of the pad. The results showed that the high electrical resistivity areas, which are likely related to low moisture, could be explained by the physics of unsaturated fluid flow or evapotranspiration. The low electrical resistivity areas were thought to be related to high moisture from preferential flow along highly permeable regions of the heap. Validation of electrical resistivity was accomplished by correlating co-located geophysical data and rock samples of moisture content and total gold concentration. On an individual point-by-point basis, the correlation between the two datasets was low, due to the mismatch in measurement scales of the two characterization methods. Averaged resistivity data within discrete bins of the independent variable (rock sample), however, produced high correlations and empirical models were developed from a linear regression of averaged behavior.     

Design∕Build Methods for Electrical Contracting Industry

This paper reports on a project sponsored by the Electrical Contracting Foundation that examined the design∕build (D∕B) approach and the various dimensions of the decision process that electrical contractors consider before entering this emerging marketplace. Electrical contractors were surveyed regarding many different aspects of D∕B and how those factors impact their business. The survey revealed several important trends and preferences among electrical contractors. One area identified in the survey worthy of note is that many of the electrical contractors felt ill prepared to embark on D∕B with their current understanding of the issues.     

高密度电法在金矿探矿应用中几个问题的研究

应用Sting R1 IP Swift高密度电法系统,在金矿勘探中采用分辨率较高的偶极-偶极装置,在有代表性的测区进行试验剖面测量,对测量结果进行反演,将反演结果与正演理论模型进行对比,从而对系统工作之极距、最大偶极距、时间特性及成果解译等方面进行理论与实际应用对比研究,得到了系统更能高效工作的参数设置值和成果解释方法。     

激电中梯在内蒙古雅干地区的应用

介绍了1:1万激电中梯电法勘探在内蒙古额济纳旗雅干地区多金属勘察中的具体应用,结合该地区已有的地质、地球物理、地球化学资料在两个找矿靶区(Ⅰ区、Ⅱ区)布设了电法测量,对野外测量数据处理解释,圈定了两个异常区,并对异常进行了定性解释,了解了测区视电阻率、视极化率等电性特征,为下一步工作提供了一定的地球物理依据。     

南钢新建烧结中和料场工程的设计特点

介绍了南钢新建烧结中和料场工程的概况，阐述了中和料场总图布置、工艺流程、机械和电控等方面设计特点及技术应用。     

用高密度电阻率法勘探含锰岩层

高密度电法勘探是电法勘探中的一个主要分支,是发展比较成熟的一种地球物理勘探方法,具有简便、快速、经济、成果直观等优点,在地质勘查中广泛应用,并取得了良好的应用效果。介绍了高密度电法勘探技术的探测原理、工作方法、应用实例,并对其应用范围及应用中存在的问题进行了分析。     

Relationship of alcohol consumption to changes in HDL-subfractions

Epidemiological studies have consistently shown an apparent protective effect of moderate alcohol consumption on coronary artery disease (CAD). This has been considered to be due to the rise in the high-density cholesterol lipoprotein (HDL-cholesterol). Since the response of the HDL-subfractions to moderate or heavy dose of alcohol is less clear, we now compared the high-density lipoprotein cholesterol status between groups consuming different amounts of alcohol. In this population-based survey serum total high-density lipoprotein cholesterol and its HDL2 and HDL3 subfractions were blindly compared between 264 consecutive middle-aged men (37 teetotallers, 137 moderate drinkers, 90 heavy drinkers) participating in a voluntary health screening and 104 male alcoholics. Alcohol consumption correlated significantly (P < 0.001) with total HDL-cholesterol, HDL2, HDL3 when all subjects (n = 368) were included but the correlation disappeared when alcoholics were excluded (n = 264). In comparison with teetotallers, alcoholics had significantly higher total HDL-cholesterol, HDL2 and HDL3 values (P < 0.001). Moderate or heavy intake of alcohol had no effect on HDL2 but increased the HDL3-fraction. If the protective effect of moderate alcohol consumption is mediated by high-density lipoprotein, it may not be accounted for by changes in the HDL2-fraction. The observed increases in the concentration of the HDL3-fraction, however, suggest that this subfraction may not be inert with respect to coronary disease and could possibly have a role in the protective effect.