地下开采对山体边坡稳定性影响的数模分析新方法

针对岩土工程软件FLAC3D在复杂模型构建及单元网格加密中存在的不足,提出了一种基于AutoCAD和DIMINE软件建立复杂三维地质模型的直观、快速的模型生成技术,可有效降低FLAC3D中复杂网格模型建立的难度。DIMINE软件具有强大的三维可视性,在图形与网格划分功能中优点突出,可实现复杂模型的快速构建,并经相应程序转化为满足要求的FLAC3D文件,再将模型导入到FLAC3D中进行模拟计算,最后结合工程实例,模拟分析矿山地下开采对山体边坡稳定性的影响。结果表明:该建模方法能精确建立复杂三维地质模型,并实现模型中任意剖面的提取,可为数值模拟计算提供依据,为复杂地质三维模型的构建提供了一种全新的建模方法。     

基于AutoCAD和ANSYS的FLAC~(3D)复杂地质体建模

FLAC3D在地下复杂地质体实体建模及网格划分方面存在弊端。通过AutoCAD进行三维建模,将生成的AutoCAD图导入ANSYS中,可实现ANSYS的快速建模;应用ANSYS有限元程序可以快速便捷地进行网格划分,将划分后的网格文件利用ANSYS_TO_FLAC3D接口程序将其转换为FLAC3D可识别的FLAC文件。最后FLAC3D调用FLAC文件,从而实现复杂地质体的建模。详细阐述了AutoCAD、ANSYS在FLAC3D建模中的作用,并结合工程实例,验证其可行性和有效性。     

基于AutoCAD的FLAC3D地下工程快速建模方法研究

 FLAC3D网格建模主要采用命令驱动模式。在模型工程地质条件较复杂的情况下,其建立三维网格模型的效率明显降低。针对采矿工程领域的数值模拟计算问题,研究了AutoCAD平面图形向FLAC3D模型转换的方法。利用AutoCAD建立了FLAC3D模型,并给出了详细的方法与步骤,实现了利用FLAC3D分析问题时方便、快捷地建立复杂地质模型。     

FLAC3D复杂网格模型的构建及其工程应用

借助通用有限元软件ANSYS在复杂网格模型建立方面的优势,通过开发的数据接口软件,实现了复杂地质体网格模型在ANSYS中建立并导入FLAC3D中的目的,有效降低了FLAC3D复杂网格模型建立的难度.采用该方法建模时,先通过地质建模软件GOCAD获取等高线的三维坐标数据,然后将这些数据输入图形处理软件SURFER整理后输出为等间距的点坐标,接着采用这些点在ANSYS中生成等间距样条曲线并最终建立实体模型并网格剖分,尔后通过接口程序将ANSYS中的网格模型导入FLAC3D以实现复杂岩土工程的计算分析.最后以西南某一水电站厂房边坡网格模型的建立为例,说明了该方法既实用又高效.     

基于AutoCAD的拱形交叉巷道FLAC3D快速建模研究

拱形交叉巷道FLAC3D模型网格建立时要利用FLAC3D中固有的柱形交叉隧道网格(cylint)单元,建立三维网格模型效率较低。针对采矿工程领域的数值模拟计算问题,研究了Auto-CAD平面图形向FLAC3D拱形交叉巷道模型转换的技术,利用AutoCAD建立了拱形交叉巷道FLAC3D模型,并给出了详细的方法与步骤,实现了利用FLAC3D分析拱形交叉巷道工程问题时方便、快捷地建立地质模型。     

采空区和露天边坡之间的相互影响分析

由于FLAC3D软件在复杂的三维地质建模与单元网格划分等方面存在很多不足,且所建模型易出错、难检查。利用3DMine软件建立柿竹园多金属矿的三维地质体块体模型,并用八叉树法实现了单元块的合并与细分。将模型以数据文件的形式输出,形成FLAC3D命令流,再将命令流调入FLAC3D软件中执行,从而准确、快速的建立了FLAC3D模型。利用该建模方法对采空区和露天边坡之间的相互影响进行了模拟分析,验证了两种软件耦合的可行性和有效性。     

通用三维地质模型及数值网格快速构建方法

为解决大型岩土工程三维数值模拟过程中地质模型复杂、不同软件网格兼容性差、剖分效率低的难题,基于3DMine矿业工程软件和Rhinoceros软件平台,采用NUBRS曲面建模技术快速构建通用三维地质模型,并通过Hypermesh软件进行快速网格剖分;开发了Hypermesh通用数值网格与FLAC~(3D)、ANSYS、ABAQUS等数值计算网格间的转换程序。通过某露天矿边坡三维地质模型和数值网格构建的实例,验证了该方法的可靠性和高效性。     

基于FLAC3D数值模拟的前后处理优化研究

FLAC3D在求解岩土工程问题方面具有许多优越性,但其在前处理(建模与网格划分)和后处理(图形结果输出)方面却存在着明显不足。对此,提出了首先利用具有强大图形与网格划分功能的ANSYS软件来实现复杂模型构建,然后通过相应程序将模型导入到FLAC3D中进行模拟计算,最后将计算结果导入到tecplot软件中进行后处理分析,用等值线来替代FLAC3D中的区域颜色,以实现结果的直观化操作流程。通过对某矿采场的建模和模拟计算,验证了该方法的优越性和可行性。     

基于GOCAD的边坡三维地质体模型的构建与应用

构建三维的地质模型能够将地形信息以及勘察信息以更加形象的方式展现出来,这样可以总结归纳出该区域此信息的分布规律,从而为利用ANSYS等数值分析软件进行分析构造出相应的三维模型。首先阐述了三维地质建模的概念与GOCAD三维地质建模软件特点,然后以某露天矿山排土场边坡为例,进行了基于GOCAD的边坡三维地质体建模构建。继而提出利用GOCAD软件对某区域的地表、地层的地质信息进行相应的的转化,得到的模型数据文件可以被数值模拟软件如ANSYA、FLAC3D直接读取,从而进行边坡稳定性方面的数值分析。     

太和铁矿西端帮边坡工程地质模型及其三维剖分方法

在太和露天铁矿详细工程地质勘察的基础上，为西端帮边坡稳定性分析，量化地圈定出冰碛土边坡体的空间几何形态和可视冰碛土-辉长岩界面，依据冰碛土组成和结构特点，构造出西端帮边坡工程地质模型。同时，借助于有限元软件ANSYS实现地质模型的三维剖分，以及ANSYS与HAC^3D的对接。     

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     

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     

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     

唐口煤矿深部复杂开采工作面瓦斯分源涌出规律研究

研究工作面瓦斯涌出规律对工作面瓦斯治理有重要意义。为了得到唐口煤矿深部3号煤层复杂开采条件下工作面回采时期瓦斯涌出时空演化规律,选取6304工作面作为对象,采用实测方法研究6304工作面瓦斯涌出规律。结果表明:6304工作面瓦斯涌出量为6.534 m³/min,其中煤壁占34.27%,落煤占29.62%,采空区占36.11%;沿工作面倾向由低到高,瓦斯浓度整体为上升趋势,其中1—76号架工作面瓦斯浓度小于0.20%,76—102号架瓦斯浓度上升明显,最大为0.387%;上隅角的后部采空区是工作面的瓦斯主要涌出源,上隅角1号测点瓦斯浓度0.78%,上隅角周边3号、5号、7号、8号、9号测点瓦斯浓度平均为0.643%;周期来压时,上隅角瓦斯相对平时较高。研究为针对性的瓦斯分源监控与灾害防治提供基础。