露天矿不稳定边坡的管理

本文采第第四届大型露天矿国际会议论语言，叙述了大冶铁矿东露天矿控制不稳定边坡时采用的风险管理对策，由于在边坡管理中积累了多方面的经验，使得在３５０ｍ高陡边坡下能地实施采掘作业和加固工程。     

大冶铁矿东露天尖山深部边坡挖潜研究与实践

大冶铁矿东露天采场形成４０８ｍ高陡边坡,如何发挥该露天矿晚期的生产潜力？通过对深部边坡的工程地质,边坡稳定性的分析,研究,论证了边坡加陡的可行性,经实施获得了显著经济效益。     

大冶铁矿东露天采场临近边坡的爆破工作

武钢大冶铁矿东露天采场已由山坡露天过渡到深凹露天，目前已开采到－１３２ｍ水平，形成边坡的垂高达４０８ｍ。几十年来，生产实践与科学研究相结合，根据矿岩性质总结出：边坡稳定性分类、合理的微差爆破间隔时间、临近边坡爆破的要求、临近边坡爆破起爆方式，为矿山的建设和发展作出了重大贡献。     

压密注浆法加固明挖渠箱边坡及基底土体

广州西湾路市政工程大型排水渠箱，施工总长约２．５ｋｍ，连接西湾路污水渠箱出口汇总处，渠箱宽２．０ｍ，高１．８ｍ，埋深９．０ｍ。西湾路渠箱地质条件为淤泥粉细砂和粗砂层，由于地层水位高，土体含水率＞７５．７％，粗砂层透水率大，极易产生涌水涌砂，导致边坡严...     

新桥硫铁矿矶山东部边坡地下水的综合防治

针对新桥硫铁矿矶山东部边坡第四系土层厚，透水性强，新沟距边坡近（仅５０ｍ），形成直接补给，临近边坡的专用线位于边坡上方，边坡安全稳定要求高等总是以了帷幕注浆、疏干排水等综合治理措施，取得了显著成效。     

高废石堆边坡稳定性的三维效应

对所有矿山来说，废石堆的自然安息角和这坡稳定性都是非常重要的。在传统的边坡稳定分析中，将边坡作为平面应变模型，事实上，从平面上看边坡是以曲线形状形成，因此产生的边坡面在平面上或是凸形或是凹形，废石堆的三维形状类似于轴对称的旋转体，这就可采用二维网格或极坐标系统进行分析。本文采用了这种分析方法研究了澳大利亚北昆土兰基德斯顿金矿有限公司的一个２５０ｍ高坑内废石堆。分析结果表明，采用非线笥莫尔－库仑包络     

水平铜矿西部边坡0～2~#线滑坡体的成因及综合治理

永平铜矿西部边坡在１～２勘探线的２０２ｍ标高至２９８ｍ标高间发发生了约１５万ｍ３的滑坡，在分析滑坡体成因的基础上，判定滑体边界，采取相应的综合治理措施，制止了滑坡体的进一步下滑。     

卡西阿露天矿边坡变形和深部不稳定性评价 一

在卡西阿矿，３４０ｍ高的上盘最终边坡的形成，造成了一个什重征达１７６０万Ｔ的深部边坡失稳区。变形机理与位于坡脚处多节理，易变形的蛇纹岩的挤压变形有关，由此引发了中上部边坡较坚硬的沉积岩的平面滑动和地堑倾倒破坏。尽管记录下的位移速度高达１５０ｍｍ／ｄ，但通过对破坏的了解，控制，矿山安装了一套适宜的监测系统，且在仅损失少量可采矿石的情况下完成了露天开采。在开采作业的最后年限里，要求进行强化开采。本文描     

贵定露天石灰矿不稳定边坡的治理

着重讨论了贵定石灰石矿边坡１２２０－１１８０ｍ水平在１号剖面左右深层不稳定地段的边坡治理方案。推荐方案强调多台阶同时回采，以推迟靠帮，进而推迟可能的表层滑坡治理。还讨论了护坡矿壁回收及该矿其他不稳定地段边坡治理等问题。     

银洞坡金矿临近边坡预裂爆破技术的应用

为控制银洞坡金矿靠帮爆破对最终边坡的震动与破坏，开展了现场预裂爆破试验，提出了最优爆破参数。试验研究表明，与普通爆破法相比，采用预裂爆破法进行靠帮爆破，可使该边坡安全系数值提高１１％～１２％，应用该成果，将边坡角提高１°～３°，减少剥岩９４万ｍ３，经济效益显著。     

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