论当量品位理论优化矿区中心孤岛境界

本文通过介绍当量品位理论在德兴铜矿铜厂矿区中心孤岛境界优化设计中的实践应用,提出开采多金属矿床的矿山企业应从境界设计上、生产控制上综合考虑多金属元素的综合回收,从而可提高资源的利用程度, 又可保证企业经济利润最大化。     

FCS2000在加热炉自动控制系统中的应用

本文介绍了重庆川仪FCS2000系统在宝钢集团上钢五厂退火炉和均热炉控制系统中的应用。作者分别详细地阐述了第一、二期工程所含加热炉的工艺流程、相关控制系统的结构、主要配置和基本控制方案。该控制系统以FCS2000现场总线控制系统为基础，结合了先进的DLL算法和OCX控件技术；以经典的双交叉配比燃烧控制方案，克服了特种钢材后期处理中的自动控制技术难点。该系统达到了国内领先水平。     

蚀坑法研究冷轧及退火工艺对无取向硅钢织构演变的影响

以太原钢铁公司经酸洗后的热轧低硅板卷为实验材料,采用蚀坑法研究了一定退火工艺及不同冷轧工艺对无取向硅钢织构的影响,结果表明,总变形量及退火工艺是影响织构形成的重要因素,采用可逆轧制方法(冷轧总变形量控制在70%左右,分8道次完成,并且平均分配各道次压下率)和890 ℃加热,保温4 min,然后水冷,可以获得较高的{100}面系织构组分占有率的无取向硅钢.     

无线监测系统在眼前山铁矿高陡边坡上的应用

针对眼前山铁矿采用三并段靠帮工艺所形成的高陡边坡 ,首次建立了边坡无线监测系统。在工业试验期间 ,仅对该矿 9号滑体进行了监测 ,经设计可节省工程费大约 40 0万元。     

A Distributed Ground: The Unknown Fields Division

As leaders of the Unknown Fields Division at the Architectural Association (AA) School of Architecture in London, Liam Young and Kate Davies take their students on trips to the end of the earth. Cataloguing extreme territories, they investigate the role of design in developing new cultural relationships. Fictional speculation is used as an instrument for understanding emerging environmental and technological futures, in a process of experiencing, chronicling and, ultimately, reimagining the urban and the remote, and charting global flows and trajectories. Here they describe a speculative supply chain that begins below the surface of the Western Desert in outback Australia, and continues to the Arctic ‘Northwest Passage’ and on to London.     

中深孔松动控制爆破技术在三山岛金矿的应用

为了减少矿柱的损失,在三山岛金矿直属矿区内,采用基坑开挖的方式对地表以上+10 m至地下-2.0 m的矿体进行回采。受现场工业厂房布置限制,并考虑加快施工进度、降低生产成本等方面因素,爆破方式采用中深孔松动控制爆破技术。为了最大限度地降低爆破震动对周边环境的影响,首先对基坑轮廓先进行预裂爆破,再进行中深孔松动控制主爆破。通过对2种控制爆破的爆破参数进行详细确定,分析爆破效果,阐述了爆破方案选择、爆破参数优化、起爆网路的设计和爆破安全校核与防护,为类似工程设计提供参考。     

基于DIMINE软件系统的露天矿境界优化研究

露天境界优化是露天矿设计和生产经营管理的重要环节,而最终境界优化是一项需要综合考虑矿山资源状况、开采技术条件、矿产品销售价格、矿石开采及处理成本等多种因素,实现经济效益最大化的复杂工作。目前,三维可视化矿床模拟技术和露天境界优化方法的完美结合使其工序更为简化,并可获得良好的动态效果。以广西平果铝土矿为研究对象,借助DIMINE软件系统建立了该露天矿山的三维实体模型,更加准确、直观地反映了矿床与工程实体的形态及其空间分布关系。针对所建的矿体模型进行了品位估值、储量计算等工作,并基于Le-rchs-Grossmann优化方法(L-G法)对该铝土矿进行露天境界优化研究,参照采矿手册及工程经验,确定合理的露天境界优化参数,得出了该矿山露天开采的最优经济境界。结果可用来指导该矿山前期的资源开发和投资决策,并为后期安排生产计划和实时调度控制提供可靠的依据。     

甘肃北山坑探设施光面爆破施工技术研究

甘肃北山坑探设施为我国高放废物地质处置工程研发及建设阶段里程碑式的设施。基于光面爆破施工方法,设计了甘肃北山坑探设施项目光面爆破的爆破参数,得到了适宜于本项目的爆破实施方案,进而实施了在不同爆破参数（周边孔间距）的光面爆破,验证了光面爆破参数的科学性。同时,需指出的是,钻爆施工涵盖多种不同的爆破参数,影响因素众多,爆破试验获取的爆破数据仅仅是对不同周边孔间距的初步探索。研究成果可对后续工程开挖提供相应的试验数据与理论支撑,其对于深部地下工程的爆破开挖及高放射性废物的深地质处置有一定的理论指导意义。     

南芬露天矿北山采区道路和开采的优化设计

针对南芬露天矿多分期分区开采的特点,规划不同分期分区的剥岩进度,适时优化采区的运输道路和开采计划,形成近距离运输道路,并发挥破碎—胶带运输系统的优势,缩短生产车辆的运距,降低矿山运营费用,经济效益可观。     

Analysis of pits induced stresses due to metal corrosion

The corrosion damage due to pitting is commonly observed in a wide range of aluminum alloys and structural steels that are being used for aerospace and naval structural applications. In order to predict the nucleation of cracks resulting from nucleation and growth of pits, there is a need to obtain the stress environment around pits. The objective of this study is to investigate the pits induced stresses responsible for possible crack nucleation using the photomicrographs of corroded aluminum 5059 alloy samples using stress analysis. An analysis procedure is developed using CAD and finite element analysis to predict stresses due to single and/or multiple corroded pits. The analysis was performed to investigate stress distributions on the corrosion surface as a function of sensitization time. The results obtained indicate that as the duration of the specimen sensitization increased from 50 days to 74 days, the highest stress levels have increased by about 56%. However, further increase in the sensitization time from 74 to 100 days has very little effect on the stress level. The observed severe exfoliation or the tearing of the sample surface layers in and around the pits is due to the nucleation and coalescence of fine cracks. The cracks are nucleated because of the production and the buildup of differential stresses along the sample thickness.