铁古坑露天矿西部矿体赋存规律研究

为进行铁古坑故深部矿体的探矿和开采，通过对 80m水平以上已揭露矿体与原地质资料进行对比研究，在重点部位和疑点处设计并开展了钻探控制，掌握了 80m～ 30m水平矿体的赋存规律，满足了生产开采需要。     

刘楼铜铁（金）矿生产勘探方法探讨

将刘楼铜铁（金）矿-250 m水平以上生产勘探资料与原地质资料进行对比,发现矿体赋存状态复杂、连续性差。通过分析,认为只有选用正确的勘探方法、采取边探边采、探采结合、超前探矿、探水治水的模式才能保持矿山的三级矿量平衡和工程布置合理。     

基建勘探在超深井矿山建设中的应用：以思山岭铁矿为例#br#

思山岭铁矿上下采区首采开拓中段标高分别为-1 020 m和-1 200 m,地质勘查程度为详查,资源储量级别为控制的（122b）和推断的（333）。经基建巷道工程揭露,矿体赋存形态并非地质勘查时认为的“似金元宝形”向斜,而是单斜构造控制的矿体形态。详细分析了基建勘探工作在该矿建设中的作用,认为基建勘探采用探采结合、坑钻组合手段,注重综合研究概化地质模型,对矿井基建开拓设计和施工具有较好的指导作用。     

基建勘探在超深井矿山建设中的应用:以思山岭铁矿为例

思山岭铁矿上下采区首采开拓中段标高分别为-1 020 m和-1 200 m,地质勘查程度为详查,资源储量级别为控制的(122b)和推断的(333)。经基建巷道工程揭露,矿体赋存形态并非地质勘查时认为的"似金元宝形"向斜,而是单斜构造控制的矿体形态。详细分析了基建勘探工作在该矿建设中的作用,认为基建勘探采用探采结合、坑钻组合手段,注重综合研究概化地质模型,对矿井基建开拓设计和施工具有较好的指导作用。     

南京铅锌银矿上部矿体探采对比浅析

南京铅锌银矿-325 m水平以上矿体已结束开采,通过进行探采对比,分析指出了勘探与开采过程中存在的问题,总结了经验教训,对指导下部矿体的勘探与回采作业具有重要意义.     

云锡卡房新山矿段采场结构参数优化研究

经过加密钻孔勘探后,发现云锡卡房新山矿段的矿体赋存条件有显著变化。采用MIDAS软件对依据原来赋存条件设计的采场结构参数是否满足实际生产的需要进行验证优化。研究结果表明:选取采场宽度35 m、人工矿柱15 m的采场结构参数作为云锡卡房新山矿段在矿体赋存变化条件下的实际工程参数,不仅可保持采场稳定性,而且有利于生产中矿石的回采。     

中梁山北矿井断层特征及其对安全生产的影响分析

中梁山北矿井地质构造极为复杂,经生产和补充勘探资料查明,井田内大中型断层有21条。利用勘探和生产揭露收集到的地质资料,研究了生产水平断层的展布规律、发育特征,以此分析-20 m水平的断层展布及其对安全生产的影响,为矿井-20 m水平开拓、开采方案的选择提供依据。     

和睦山铁矿最终水平开采技术研究

和睦山铁矿后和睦山矿段应用无底柱分段崩落采矿法,-250 m以下矿体赋存状态较为复杂,最终水平-300 m分段的矿石回采存在一定难度。通过修正后和睦山矿段勘探剖面图,分析矿体上、下盘围岩地压的分布规律,确定下盘运输、上盘回采的开采技术方案,保障后和睦山矿段最终水平矿石的安全高效回采。     

基于稀空法的安徽李楼矿区生产勘探网度优选

生产勘探网度是勘探工程(包括探矿巷道和探矿钻孔)圈定各级别储量的主要参数,网度越密,矿体控制精度越高,所获得的高级储量越可靠,但勘探网度过密,则提高生产勘探成本;而网度过稀,则控制不住矿体,造成采场工程浪费以及采矿损失率、贫化率过高,最终导致采矿成本的增高,甚至延误生产引发技术性事故。通过对安徽李楼铁矿-140~-425 m水平6#~36#线主矿体采用抽稀法进行生产勘探网度对比,结合具体情况及相关规范,推荐该矿区生产勘探网度为100 m×100 m,对于降低该矿区的勘探成本,提高勘探效果具有一定的参考价值。     

槽波反射法在矿井断层探测中的应用

断层是制约矿井生产的一个重要影响因素,提前探测出断层位置及赋存参数对确保矿井生产安全具有重要意义。为了探测出屯兰矿22301工作面断层赋存情况,在采面皮带巷内采用槽波反射法进行探测,后将探测结果与钻探、实际开采时揭露断层参数进行比对,并对该技术方法在井下断层精度勘探中应用情况进行分析。采用主频率100~150Hz、速度880m/s槽波在22301探测出存在一条西南方向、长度205m反射界面,推测为一断层,经过轨道巷道内的钻探、掘进揭露以及采面回采揭露,证明了该断层真实存在,且实际走向与探测走向一致,实际揭露位置与探测位置偏差8m,采面内延伸长偏差7m。结果表明,采用槽波反射法可以实现对采面内断层的精准探测,可以在一定程度上弥补三维地震勘探存在的探测结果偏差大问题,提升采面生产安全系数。     

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