火山岩型铀矿山环境地质调查评价方法研究

通过对典型火山岩型铀矿山及周边地区的环境地质调查及样品分析测试,厘定矿山放射性气态、液态、固态源项特征及分布,开展放射性迁移循环途径研究及矿山周边公众潜在附加剂量评价研究,初步建立放射性矿山环境地质调查评价体系。结果表明,该研究可以为查明火山岩型铀矿山开发过程中对环境介质的影响程度和范围提供方法指导。     

遥感技术在内蒙古东乌珠穆沁旗萨麦地区的找矿应用

本文以内蒙古东乌珠穆沁旗萨麦地区1:5万巴彦塔拉等4幅区域地质调查范围为研究区,以ETM+影像数据为信息源,以波谱理论为基础,从遥感图像中提取蚀变信息继而进行遥感找矿实践。针对区内铁染、羟基蚀变类型使用主成分分析等方法,将研究区划分为10个异常区,结合区域构造特征情况,对异常区域开展了1:1万路线调查,综合判定后,选择了4个找矿靶区进行了化探剖面探测并进行了成果分析,结果显示遥感蚀变信息与野外调查和化探异常吻合较好。     

Integration of GIS and video surveillance

This paper discusses the integration of three-dimensional (3D) geographic information systems (GIS) and video surveillance systems using augmented reality (AR) techniques. The motivation for this integration is to overcome problems faced by conventional video surveillance systems. Explicit information concerning which camera currently monitors what area in such systems is missing; therefore, insight into the situation depends heavily on the operator’s training and experience. To ensure the complete coordination and monitoring of a situation in a system with multiple cameras, it is necessary to introduce a single reference system. GIS arises as a natural solution because it not only provides a solid ground truth but also provides semantic information that can be highly important in certain video surveillance applications. To integrate information into a GIS application, that information must be georeferenced. Based on our previous research regarding the addition of georeferencing information to surveillance video, this paper introduces models that can be applied to help integrate video and GIS. With an analogy to Milgram’s continuum between the real world and virtual reality, and analogous to the augmented reality and augmented virtuality in Milgram’s continuum, two models of integration are defined here: GIS-augmented video and video-augmented GIS. Then, we define the architecture of GIS-based video surveillance based on these proposed integration models, and finally, a prototype is implemented. The implemented prototype serves as a basis for analysing possible applications of real-world systems based on the integration of GIS and video.     

山东济宁许厂煤矿下组煤瓦斯与二氧化碳开发利用前景及存在的问题

许厂煤矿下组煤中蕴藏着较为丰富的瓦斯、二氧化碳资源。下组煤位于瓦斯风化带内,含瓦斯、二氧化碳和氮气等气体,瓦斯含量与埋藏深度呈正相关关系,主要存在低含量瓦斯、二氧化碳抽采率、二氧化碳资源化转换等技术方面的问题。从国家相关优惠政策、资源优势、煤与煤层气一体化开发技术、近水平长钻孔定向钻进技术、煤层压裂造缝技术、煤层注气增产技术和瓦斯、二氧化碳气体提纯技术等关键技术的发展程度,结合煤矿的下组煤层的开采方案,认为许厂煤矿有着较好的煤炭与瓦斯、二氧化碳一体化开发利用前景。     

基于Neuman井流理论确定玄武岩潜水含水层渗透系数的应用——以吉林靖宇煤矿为例

全面分析研究区玄武岩潜水含水层水文地质条件的基础上,对稳定流和非稳定理论确定潜水含水层渗透系数的优缺点进行了对比,认为非稳定井流公式确定玄武岩潜水含水层渗透系数是合理的。Aquifer Test软件基于Neuman井流理论配线法求参原理,运用计算机完成了自动求参,避免了人工配线的不足。该文根据吉林靖宇煤矿研究区玄武岩潜水含水层非稳定流抽水试验,分别用Aquifer Test软件和稳定井流公式进行了求参,并对比分析得出:玄武岩含水层弹性释水作用影响时间较长,利用Neuman潜水井流公式求参可靠,且更逼近现实;用Aquifer Test软件实现了自动求参,具有操作简单规范、可比性好的优点。     

Overcoming Trade Impediments: Considering SME Exporters from Nova Scotia

Firms often encounter location-based impediments that hinder them from engaging with international markets. These challenges can be exacerbated for smaller firms, which often have limited resources and exposure to global markets. This article examines successful small and medium-sized exporters from Nova Scotia, a province with decreased export activity in recent years. It explores these firms’ trade-related motivations, their impediments, and the strategies that they have used to address possible location-related problems. Although geographical distance does not appear to be a competitive challenge, other issues emerge, including travel expenditures and the costs of export intelligence gathering. Successful exporters have overcome many potential impediments by using government trade programs, establishing and maintaining face-to-face contacts, and working with international partners.     

伊犁盆地伊昭井田煤层煤质特征研究

伊昭井田位于伊犁盆地中西部,煤层资源储量36亿t。赋煤层位为侏罗世水西沟群西山窑组,共含煤12层,其中可采煤层6层,3号煤层和5号煤层为井田主采煤层。对各煤层特征进行了研究,总结了各煤层特征及赋存规律及各煤层煤质特征及工业利用方向。对指导伊犁盆地的煤炭勘查、开发利用及生产布局具有积极意义。     

济宁许厂煤矿伴生分散元素铼的富集成矿探析

铼是一种分散金属,目前尚没有在煤层中富集成矿的案例。该文依据山东省济宁煤田许厂煤矿16上、17煤层光谱分析成果,结合铼元素的性质、物质来源和石炭-二叠纪太原组的聚煤环境等因素进行综合分析,论证了其富集可能性。简要阐述了铼富集成矿的意义,建议煤田地质勘查工作中加强对煤中伴生铼元素的分析和研究。     

秦岭某钼矿区开发对东川河流域Cd的影响

为了探索矿业活动对河流水质产生的影响,以秦岭某大型钼矿区下游的东川河流域为研究对象,通过现场采样与室内测试的方法,分析了地表水、沉积物、岩矿样品中重金属Cd的含量特征。采用污染超标倍数法、地累积指数法及Hakanson潜在生态风险评价法分别对东川河流域的河水和底泥样品进行了污染现状评价和生态风险程度评价,最后讨论了Cd的来源。结果表明:东川河主沟16个河水采样点位中,有11个点位的Cd含量明显高于未受矿业活动影响的对照区各点位Cd含量值,Cd含量变异系数达到95.65%,并且从上游到下游各点位Cd含量呈偏态分布,说明东川河流域Cd受矿业活动影响显著。东川河主沟16个河水采样点中有15个Cd含量满足地表水Ⅱ类水标准,比重为93.75%,可以判断东川河整体水质较好。仅5号点位超Ⅱ类水质标准,污染超标倍数为1,为轻度污染。地累积指数分析结果表明,东川河主沟11个底泥样品均存在不同程度的污染:污染最严重的10号点位达到中度-强污染级别;污染最轻的8、9、13号点位为无污染-中度污染;大多数点位为中度污染。东川河主沟11件底泥样品重金属Cd的潜在生态危害指数平均值为120.27,表明东川河主沟底泥总体达到强生态风险程度。酸性矿山废水、原生地质背景、底泥释放、大气干湿降尘等是造成东川河流域Cd重金属污染的主要污染源。     

Porphyry Copper Deposit Prognosis in the Middle Region of the Bangonghu–Nujiang Metallogenic Belt,Tibet, Using ASTER Remote Sensing Data

The B angonghu–N ujiang metallogenic belt is considered to be T ibet’s third copper belt after the Y ulong and G angdese copper belts. The D uolong gold‐rich porphyry copper deposit, located in the western part of the B angonghu–N ujiang belt was recently recognized as a superlarge prospect. The A dvanced S paceborne T hermal E mission and R eflection R adiometer (ASTER ) was used to characterize the D uolong porphyry deposit alteration area, and three methods, color enhancement, band ratio transformation, and spectral angle mapping, were utilized to extract the phyllic and argillic alteration zones, which are typically considered the most important predictors of porphyry copper. Seven prospecting areas, which match mapped alteration zones, were delineated in the D uolong deposit. In addition, an ASTER image of the eastern region of the B angonghu–N ujiang belt in the X iongmei area was used to extract alteration information, and an area with image characteristics similar to the D uobuza and B olong ore deposits was identified as a prospecting area. Numerous malachite outcrops were identified in the field, and both laboratory analysis and isotopic dating confirmed that the deposit had formed concurrently with the D uobuza deposit (119 M a). Geologic mapping at the 1:5000 scale was conducted in the area, and three types of ore‐bearing rocks were identified, indicating that this area has significant potential to host ore deposits. The discovery of the X iongmei copper mining area is significant for the B angonghu–N ujiang belt.