煤矿瓦斯地质图中绘制等值线的技巧

为了准确地绘制瓦斯地质图,从瓦斯地质图绘制的目的及绘制方法展开研究,找出了现行瓦斯地质图中绘制等值线存在的4点问题:插值方法的合理选取;断层的绘制在Surfer软件中的实现;测点及其测定值在瓦斯地质图中的标定;地质单元的划分。对这些问题进行了论述,提出了解决办法,对提高煤矿的安全生产具有重要的意义。     

基于文件的矿图绘制系统

介绍了一种基于文件的Auto CAD矿图绘制系统,包括矿图模板、矿图符号库、矿图图层功能等。使用该矿图绘制系统后,大幅度减少了矿图绘制的工作量,缩短了矿图的成图时间,提高了矿图的绘制精度和效率,有较好的推广应用前景。     

基于地质勘探数据的三维储层模拟

简要介绍了可视化领域常用的两种方法:面绘制和体绘制方法,以及他们各自的优缺点.简要介绍了几种常用的体绘制算法,详细介绍了体绘制中最典型的光线投射算法的基本原理和流程.以VC++为开发平台,在Windows操作系统上,利用可视化工具VTK提供的光线投射体绘制算法和三维建模方法,以地质勘探数据为例,实现了研究区的三维储层模拟-渗透率模拟以及钻井模拟.     

矿井通风系统平面图绘制程序的研制

为适应矿井通风系统平面图形的专业化绘制要求，以通用绘图软件包ＡｕｔｏＣＡＤ为平台，用ＶｉｓｕａｌＢａｓｉｃ５．０开发了通风系统平面图辅助设计软件。该软件操作简便，功能齐全，具有单、双线的专业化绘制功能，有效地提高了通风系统平面图的绘制效率，减少了绘制工作量。     

基于AutoCAD的掘进炮眼布置绘制系统

掘进炮眼布置绘制系统基于AutoCAD二次开发,系统可绘制楔形、锥形、螺旋等12种掏槽方式,绘制辅助眼及周边眼及爆破作业图表,大大提高了设计工作效率。     

二维及三维矿图的绘制

介绍了AutoCAD软件平台的二维矿图数字化的主要方法和绘制的具体步骤,以及在绘制三维矿图中,手工绘制的具体步骤和用软件编程的基本思想。     

应用CAXA电子图板巧绘地形图

一些专业测绘部门均有专用的测绘软件绘制地形图,但当某些没有专用测绘软件而又需要绘制地形图的情况下,可使用CAXA电子图板巧绘地形图,介绍了绘制的方法.     

用计算机绘制矿图

文中针对利用计算机在绘制矿图时的特点,提出了自己的几点看法跟大家交流,以便进一步做好计算机在矿图绘制上的工作,充分发挥计算机在矿图绘制中的作用。     

计算机辅助系统在巷道开拓炮眼布置中的应用

随着计算机绘图技术的发展,CAD技术在工业生产图形绘制工艺中得以实现。文章以煤矿开拓巷道炮眼布置为研究对象,阐述了炮眼布置图绘制的基本条件,提出了基于计算机辅助设计的炮眼布置图绘制软件开发思路。以AutoCAD平台为基础,利用LISP语言开发了针对炮眼布置的辅助程序,通过实际应用,绘制出了完整的、符合要求的炮眼布置图。     

矿井三维巷道的半自动绘制

以AutoCAD为图形处理平台,采用手工绘制与编程绘制相结合的半自动绘制方法,即用Visual BASIC编程实现绘制三维巷道的关键语句,其他部分仍用手工绘制,再结合后期图件的修整即可完成复杂的三维巷道绘制。这种方法具有程序简单、绘制速度快、用户易于操作、便于后期应用开发等特点。     

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     

Annual Report analysis of Chinese rare earth-related listed companies in 2013

<正>Chinese rare earth-related listed companies have published their 2013 annual reports.It can be understood from their reports that production and operation activities of Chinese rare earth-related companies were still heavily affected by macro economy and industrial policies.They basically followed the steps of national economy.In 2013,world economy recovered slowly but the economy     

Market opportunities and challenges for rare earth polishing powder

正1.Status of rare earth polishing powder Rare earth polishing powder with high content of cerium oxide began to replace iron oxide for glass polishing and became one of the key materials in glass polishing process since 1940.Compared with traditional iron oxide,rare earth polishing powder has many advantages,such as fast polishing rate,high polishing quality and long service life.It can achieve good surface quality and improve operation conditions.For example,in lens polishing,the polishing work that cerium     

Baotou Research Institute of Rare Earths developed a new RE alloy preparation technology

正Pyrometallurgy Laboratory of Baotou Research Institute of Rare Earths had independently developed a new preparation technology of rare earth alloy for NdFeB.The alloy can remarkably enhance the coercivity of NdFeB magnet but also evidently reduce the production cost of the magnet.The new master alloy was prepared in the kA pilot-scale electrolytic cell by the independent technology.The rare earth master alloy can be used as the raw material for NdFeB.Compared     

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     

2014 second batch of rare earth quota released

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矿用防爆轴流对旋主要通风机叶片ANSYS模态分析及应用

高效节能矿用防爆对旋主要通风机的叶片是主要通风机运行的关键部件,叶片在运行时不断受到气流的作用力,从而使叶片产生振动,当叶片振动的频率与叶片的固有频率接近时,容易产生共振从而导致叶片的断裂。一旦叶片断裂时,对主要通风机的安全运行产生致命的影响,从而导致矿山、化工等企业发生重大事故,将会产生不可估量的损失。基于有限元分析软件ANSYS,对高效节能矿用防爆轴流对旋主要通风机叶片进行模态分析及产生对应的六阶模态频率,对主要通风机叶片的运行频率、固有频率及产生的共振问题进行了原理分析,并且解决了叶片频率共振的问题,从而为主要通风机叶片结构设计提供理论依据,并对主要通风机叶片的安全运行提供保障。     

2013 NdFeB export analysis

<正>China totally exported nearly 24,000 tonsof NdFeB products during 201 3,including 18,825 tons of permanent magnet,valued USD 1.34 billion at an average price of 71.4 USD/kg;3,277 tons of NdFeB magnetic powder,valued USD 1 01 million at an average price of 30.9 USD/kg;1,334 tons of strip casting ribbon,with total export value of USD 74million at an average price of 55.3 USD/kg;and 586