地下金属矿山续开采模式初探

在讨论了地下矿山连续开采的概念后,把连开采技术的研究划分为四个基本层次,阐明了各层次的研究内容和目的。层次间按不同的方式组合形成一系列的连续开采模式。拽出我国连续开采研究存在的问题和发展方向。文章对国内外连续开采试验研究有一定的指导作用     

地下矿山朝着连续采矿发展

尽管地下矿连续开采坚硬岩石的现状还不能与煤炭工业相比，但是本协会的成员们却都急于实现与地下煤矿和露天矿山已经采用的连续采矿方法相类似的经济的连续采矿方法。只所以有这样的信心，其部分原因是作了多次编制长期规划的尝试，且往往采取协作的方式，尤其是澳大利亚、北美和北欧国家的生产公司、大专院校和政府计划研究部门的互相合作。在这篇文章中K.卡斯蒂尔阐述了造成非爆破开采的主要论点，评述了目前开发切实可行的技术所     

地下金属矿山无间柱连续采矿工艺技术研究

分析了地下金属矿山连续采矿的技术经济优势,提出了我国地下金属矿山连续采矿技术研究分4个发展阶段,即采场（溜井）振动出矿、采场边境大量采矿、区域无间柱连续采矿及全矿连续大量采矿阶段等,结合国家“九五”重点科技攻关课题“无间柱连续采矿试验研究”,详细介绍了工业试验的技术条件、连续采矿方案设计的技术思想、采矿方案设计、回采工艺技术、大量采矿装备及主要研究成果。     

金属矿山地下连续开采技术

讨论了地下金属矿山连续开采的概念和连续开采技术,结合连续采矿的一些国家科技攻关项目,重点论叙了我国目前地下金属矿山连续开采技术的现状,并提出了连续开采技术面临的一些问题和发展方向.     

三山岛金矿连续规模化智能开采工艺研究及应用

过去的数十年,地下金属矿山采矿方法在崩落、空场和充填三大类的基础上,通过不断地改进和完善,形成了各种各样的采矿工艺,为我国地下金属矿山安全高效回采提供了设计依据。但当前开采工艺仍存在着开拓、采切工艺复杂,安全性差,生产能力小等突出问题,制约了资源安全高效开发。结合矿山生产实践,阐述了地下金属矿山生产模式及开采工艺演化过程,以三山岛金矿无人采矿示范区为工程背景,研发了连续规模化智能开采工艺,即采用连续分段空场嗣后充填采矿法对矿石进行回采,从开采工序连续性、地压调控及时性、采矿设备适配性三方面设计了开拓方案、采矿工艺及铲装运输环节,可为具有类似条件的矿山生产设计提供参考。     

浅谈黑色金属地下矿山损失贫化管理

浅谈黑色金属地下矿山损失贫化管理尚立翔（酒钢东大山铁矿金昌７３７０００）矿石开采的贫化率和损失率，是地下矿山企业管理水平及生产技术水平的重要指标，亦政府主管部门考核监督矿床开采技术水平、资源利用程度、交纳矿产资源费（税）的依据，随着市场竞争的需要，矿...     

金属矿地下连续开采技术探讨

讨论了地下金属矿山连续开采的概念，从我国地下金属矿山的采矿现状出发，总结了在金属矿山中逐步推广的两种广义连续采矿模式。在此基础上，结合连续采矿的一些国家科技攻关项目，重点论叙了我国目前地下金属矿山连续开采技术的现状，并提出了连续开采技术面临的一些问题和发展方向。     

国内外地下金属矿山连续开采技术研究的发展

简要介绍了地下金属矿山连续开采的概念,并将连续开采技术的研究分为4个基本层次,阐明了各层次的研究内容、目的和现状。综述了国外矿山连续开采的技术研究进展,重点介绍了我国“七五”、“八五”和“九五”期间地下金属矿山开展的多项连续采矿试验研究工作,指出了我国地下金属矿山连续开采研究存在的问题和发展方向。     

我国地下金属矿山连续开采技术研究的进展

简要介绍了地下金属矿山连续开采的概念，将连续开采技术的研究分为四个基本层次，并阐明了各层次的研究内容、目的现状。重点介绍了我国“七五”、“八五”和“九五”期间地下金属矿山开展的多项式连续采矿试验研究工作， 指出了我国地下金属矿山连续开采研究存在的问题和发展方向。     

地压控制原理在地下采矿设计中的运用

从开采顺序、采准巷道位置、巷道支护形式、覆盖岩层崩落及采空区处理等方面，以事例说明地压显现的规律，提出在地下矿采矿设计中对地压的控制方法。     

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。