用立体摄影测量方法实现煤山测量

传统常规煤山测量方法存在着工作量大、安全性差、精度低、费用高等多方面的问题。文中介绍利用近景摄影测量的方法进行煤山测量，能迅速、准确、有效地测量出煤山体积和储煤量。     

基于三维激光扫描技术的某金矿采场体积测量与计算

为提高黄金矿山采场验收测量精度与工作效率,以山东某黄金矿为例,应用三维激光扫描技术代替传统测量方法对该矿地下采场体积进行测量和计算。根据三维激光扫描测量模式,分析了激光扫描数据处理流程,构建了测量误差分析模型,研究了测量误差、采样间隔对采场体积计算的影响以及三维激光扫描数据格式转换与数据共享机制,探讨了三维激光扫描数据在SURPAC软件中的应用以及不同等高线间距、抽稀间距对采场体积计算精度的影响。研究表明:利用三维激光扫描技术能够快速精确获取采场三维空间数据,构建采场三维精细模型;为进一步提高采场体积的计算精度,可将三维激光扫描数据采样间隔设置为50~200 mm,等高线间距应小于0.5 m,抽稀间距不宜大于1.5 m。     

全站仪精密三维坐标法在钢索塔施工测量中的应用

文中介绍了钢索塔架设的精度要求;阐述了全站仪精密三维坐标法的测量方法,并根据桥位区的实际情况及不利观测条件,计算和分析了全站仪三维坐标法的实测精度,并对提高测距精度的措施进行了论述。结果表明该测量方法能满足南京长江三桥钢索塔架设平面控制的要求,但达不到高程控制的精度。     

架空管道空间几何参数的测量方法

详细介绍了如何测量管道半径、管道中心三维坐标、测量某处管道的管顶或管底高程及管道空间路径的测量方法。     

灰坝浸润线测量及绘制的一种新方法

文中采用一定的方法测定出探测管中水位的深度,根据探测管顶部的高程,计算出探测管中水位的高程,各个探测管中的水位高程汇总后,将各高程数据写入到对应的平面坐标文件中,与平面坐标联合构成每根探测管中水面的三维坐标.南方测绘公司基于AutoCAD平台研发的CASS成图系统,可根据点位的三维坐标生成等高线,进而可根据水位坐标生成等水位线,从而反映出地下水位的分布情况,与传统的反映浸润线的变化的图相比更加可视化,反映水位变化情况更加直观.     

基于测量机器人井架稳定性监测的应用研究

利用徕卡TM30伺服全站仪,采用自由设站三维测量方法解算设站点的三维坐标并采集井架上、下层监测点数据,严密平差后计算出各个监测点坐标及井架上、下层的中心坐标,根据两期监测得到的上、下两层中心坐标分别计算出井架两层中心偏移量和两层之间的高差,从而计算出井架倾斜量与挠度。通过唐口煤矿主井井架的监测数据验证该方法的可行性;实验表明该方法实施过程简单,观测效率及精度优于传统方法。     

基于三维点云分割的煤堆体积计算方法的研究

针对矿场区域煤堆体积测量的问题，提出了一种利用激光雷达绘制三维点云图像，并结合Point-Net神经网络进行分割处理的体积测量方法，相较于传统测量方法，该方法测量精度高，速度快，且无需进行接触测量，能够满足大型煤炭矿区散料堆的体积测量需求。最后利用人工搭建的煤堆进行实验验证，验证了该方法的有效性。     

《中州煤炭》2001年总目次

题　　目　刊期页次　　矿山地质与测量全站仪在地表移动观测站中的应用 2　　 1水平钻孔岩屑淤卡钻事故分析及处理 2　　 2 9等高线法煤山体积计算 4　　 11地图自动综合的现状及发展方向 6　　 15豫北下古生界暴露层特征及意义 6　　 18　　矿山基本建设高强混凝土框架柱受力变形的试验研究 1　　 4回风巷与中车场联接方式分析 1　　 15灰土垫层在处理软弱地基中的应用 1　　 19钢丝网架水泥聚苯乙烯夹芯板综合经济　效益探讨 1　　 2 2半裸体岩巷底板后注浆技术的应用 1　　 2 5暴雨山主井筒短段注浆掘砌施工 1　　 2 7钢筋的机械连接 2…     

基于三维点云分割的煤堆体积计算方法研究

我国是一个极度依赖煤炭的国家,对于煤炭的数量统计对我国发展具有重大现实意义.但是大型煤炭矿区的煤堆体积庞大,数量惊人,很难用传统的人工测量方法进行统计,为解决这一难题,本文提出了一种利用激光雷达并结合神经网络的体积测量方法.首先,利用激光雷达扫描煤堆表面绘制其三维点云图像,并结合Meshlab软件和Cloud Comp...     

煤山摄影测量系统的研究

煤山储煤量的测量是矿山测量的一项重要的经常性的工作．传统的测量方法存在着缺点和不足。本文作者根据摄影测量原理．建立了一个自动化程度较高的摄影测量系统．该系统可以较好地解决这些问题。     

Market and recycling of NiMH battery

<正>Market status and future trend of NiMH battery1.Global market of small NiMH battery Global market size of small NiMH batteries declined year on year since 2011.The trend will continue to 2018,at the rate of 5%to 10%annually.Demand for small NiMH batteries will be stable gradually.Many electrical apparatuses are powered by the built-in lithium battery today,which is the main reason for the shrunk market of small NiMH batteries.But,for some products,small NiMH     

China rare earth market review

正September 1-10,2014 Affected by the National Day holiday,rare earth transaction was stagnant and the market showed a weak steady state.As there was no good news for downstream market,some products with flat demand would likely rally slightly for some time to     

Current situation and future trend of China rare earth luminescent materialindustry(continued)

<正>Developing ecological lighting source The world is facing the big problem of energy shortage today and the contradiction between economy development and environmental protection is worsened.Therefore,people are more likely to choose an ecological light source that is more energy efficient and environmental friendly.The choice provides great opportunity for the development of rare earth optical material industry in China.The concept of green lighting positions rare earth luminescent material as a leading player in illumination market.The light source of both rare earth luminescent lamp and LED lamp is ecological and energy saving.This is why     

Galaxy Magnets achieved the net profit of 34.02 million yuan in the first six months of 2014

正Galaxy Magnet announced its financial results for the first half of 2014 on August 14.For the first six months ended on 30 June 2014,Galaxy Magnet achieved operation income of RMB 182.3 million,up8.40% over the same period of 2013,and the net profit attributable to the shareholders of the listed company of 34.02 million yuan,increasing 35.49% over the same period of last year.Stable performance increase was led by development of new customers and application market of magnets.     

Rare Earth Application in Steel in China

<正>China has rich rare earth resources.Output of rare earth and steel in China ranks the top first in the world.However,there is still certain distance between the steel produced in China and developed countries from the point of varieties and quality.China still has to import some types of steel.Improving the quality should be emphasiZed in future development of steel industry in China.Rare earth can be used to upgrade traditional steel     

China rare earth market review

正November 21~30,2014Due to weak demand from downstream industries,transactions of rare earth in Chinese domestic market were inactive.It was difficult to sell any rare earth products except for dysprosium oxide and terbium oxide.Suppliers lost confidence in recent market.Demand for rare earth products was soft.Consumers continued to take a wait-and-see attitude.Rare earth export market remained slow.     

稀散金属产业的观察与思考

分析了近年来国内外稀散金属产业的生产、应用、资源与市场状况.铟锡氧化物靶材、砷化镓晶片、锗红外材料、铼高温合金和硒在电解锰及玻璃的应用等已成为稀散金属的主要应用领域.稀散金属的产量快速增长达到历史高位而导致了市场的失衡.以GaInP_2/GaAs/Ge,CIGS和CdTe为代表的非硅系太阳能电池是稀散金属的新兴应用领域,将给稀散金属带来日益增长的需求.     

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

2014 second batch of rare earth quota released

正~~