渭北油田密井网水下分流河道储层构型研究及应用

渭北油田是鄂尔多斯盆地南部最近两年新发现的含油区块,本文以其密井网区延长组四段33油组为例,应用岩心、测井、地震及动态等资料,对辫状河三角洲水下分流河道砂体内部构型开展了系统研究。在分析单河道基本发育特征的基础上,剖面上井震结合识别单河道,平面上采用最大单层厚度与砂体层数交绘的方法,在密井网区长33油组识别出八个单河道发育期,单河道宽度一般在500~800m之间,宽厚比介于100~130之间;在平面复合河道中识别出单河道发育条数及分布范围;同时提出长33油组河道内部发育下切叠加式、不完全下切式、孤立式及薄层叠加式四种砂体叠置方式,明确了不同叠置模式在密井网区分布范围,为渭北油田密井网区注水开发和外围有利区带选取提供了地质依据。     

沱沱河铅锌多金属矿集区地质地球化学特征及找矿潜力

沱沱河铅锌矿集区位于青海省西南部唐古拉山北坡,是全国设立的首批(47片)国家级整装勘查片区之一。该矿集区不仅是青海省铅锌多金属基地的核心区,也是三江北段成矿带最具找矿潜力的矿集区,其中已发现4个铅锌成矿带及40余处铅锌矿床(点),矿集区内不同的地质单元显示了不同富集元素组合,各成矿带均以Pb、Zn为主要成矿元素,但伴生元素差异明显,三叠纪、二叠纪地层是区内比较重要的成矿层位。成矿流体具有低温、中低盐度、中低密度、低压、浅成等特点,具有多期次、多阶段及多来源的富集特点。沱沱河地区矿床规模的大小与异常的规模强度有着密切关联,几乎所有的铅锌矿床及矿(化)点均位于铅锌地球化学省范围内;在总结成矿地质条件的基础上,指出该矿集区有望成为一大型铅锌矿产资源基地,并划分了5处重要的找矿远景区,其中以纳保扎陇-多才玛-布玛浪纳铜铅锌找矿远景区最具寻找大型-超大型矿床的潜力。     

AAO曝气池多级叠合过水廊防渗漏施工技术

AAO曝气池工程为污水处理厂关键性构筑物,集污水生物处理和深层过滤为一体,施工中,如何能够保证叠合过水廊及周边池壁不渗漏,不影响到整个工艺的污水处理效果,是整个工程施工的关键。施工过程中通过采取一系列的防渗漏技术措施,取得了较好的工程效果。     

超大直径装配式混合结构浓缩池的施工

通过对西澳SINO铁矿项目90m直径装配式混合结构大型浓缩池的设计方案、施工方法、实施要点等方面的总结,阐述该装配式混合结构浓缩池的优点,可为类似工程提供参考和借鉴。     

城市风貌特色研究内涵与控制研究——以遵义市中心城区城市风貌专项设计为例

针对越来越突出的城市"同一化"问题,部分城市开展了城市风貌特色的研究和提炼,并进行了城市风貌规划的编制。该文以遵义市中心城区城市风貌专项设计为例,从遵义市城市历史格局演变和文化内涵来分析和提炼城市特色,结合"一山一水一会址"的城市总体风貌特色空间意象,从区域规划、专项规划和风貌元素提取等方面提出遵义市中心城区的风貌规划和控制措施,使遵义的城市风貌得到较大转变和提升。     

Attenuation of methylene blue dye during riverbank filtration through sandy aquifers

Although several studies have focused on the removal of organics and pathogens during riverbank filtration (RBF), no study has been carried out on the attenuation of dyes during RBF. In the present work, removal of methylene blue (MB) through aquifer materials collected from five RBF sites in India has been investigated. Brunauer Emmet Teller (BET) surface areas of the aquifer materials were 1.2–6.5 m²/g. Adsorption followed the pseudo‐second‐order kinetics and Langmuir isotherm, suggesting monolayer adsorption. Column results showed saturation capacity of 0.467–1.234 mg MB/g for different aquifer materials. Retardation factors for MB were found to be very high ranging from 430 to 987, due to its high hydrophobicity (octanol/water partition coefficient = 5.85). Results showed that BET surface area or the roughness played a very important role in the retardation of MB. Results suggest that the breakthrough of MB in a RBF well in sandy aquifers will take several years.     

Assessment of the hydromorphological state of Carpathian rivers above and below reservoirs

The article presents the results of an assessment of the hydromorphological state of selected Carpathian rivers in sections above and below the reservoirs. An attempt has also been made to assess the impact of reservoirs on the hydromorphological conditions and quality of river habitats. The research was based on the River Habitat Survey (RHS) method. The synthetic indices Habitat Quality Assessment (HQA) and Habitat Modification Score (HMS) were calculated on the basis of the gathered data for each section studied; this allowed the hydromorphological qualities of the rivers to be assessed numerically. The reservoirs interrupt river continuum, and they alter different biotic and abiotic elements of natural environment. However, this study has shown that the operation of reservoirs does not always negatively impact the hydromorphological conditions of rivers that reflect their habitat quality. The influence of reservoirs on a river's hydromorphological state above and below a reservoir's location may be neutral, but it also can improve the habitat conditions of a river.     

受污染河流水质修复技术研究进展综述

受污染河流水质修复技术多种多样,包括物理技术、化学技术、生物技术以及工程治理技术,其中工程治理技术由于物理、化学、生物手段的综合运用成为受污染河流水质修复的主要手段。该文对常用的受污染河流水质修复技术进行总结,对不同水质修复技术进行分析,最后对受污染河流水质修复技术的发展趋势进行展望。     

重金属污染河道底泥固化/稳定化研究进展

固化/稳定化技术是处理重金属污染底泥的相当有效的方法,其机理主要是通过沉淀、吸附和络合作用将重金属污染物转化为更加稳定的形态。文章在总结国内外固化/稳定化技术的基础上,简单介绍了固化/稳定化的评估方法。按固化/稳定化药剂的不同,讨论分析了水泥固化、磷酸盐稳定化、无机物混合稳定化和有机物稳定化四种方法,通过对研究成果的总结,探讨了重金属污染河道底泥固化/稳定化处理技术的发展趋势。     

有色金属矿山钢结构皮带通廊设计及应用

通过对有色金属矿山钢结构皮带通廊布置、选型、受力等探讨分析,结合PKPM结构设计软件进行了有色金属矿山皮带通廊结构设计及计算;总结了设计中需要注意的问题及工程应用,以期使钢结构皮带通廊满足空间布置合理,结构安全、可靠、适用的要求。