块石胶结充填的应用现状及发展

块石胶结充填可分为块石砂浆胶结充填、块石水泥浆胶结充填、碎石水泥浆胶结充填。本文介绍了块石胶结充填在国内外矿山的应用，并论述了其适用范围。这对此项充填技术的推广应用具有参考价值。     

分段碎石水泥浆充填采矿方法的研究与应用

丰山铜矿南缘矿带开采技术条件复杂，原采用的无底柱分段崩落法在生产中存在较大问题。研究应用了分段碎石胶结充填采矿方法较好地解决了这一问题，介绍该采矿方案和碎石水泥浆胶结充填新工艺，以及从崩落法过渡到充填法的生产衔接技术。     

全尾砂碎石膏体充填材料试验研究

通过全尾砂碎石膏体充填材料的试验研究．初步确定了全尾砂碎石膏体充填料荣的合理配比和浓度．为碎石在膏体充填技术中应用提供有用的技术参数．也为矿山进一步进行生产试验提供可靠的试验依据.     

水泥砂浆在钻井井壁壁后充填中的应用试验研究

钻井井壁壁后充填固井需要充填浆液,传统的充填方式为水泥浆充填。但水泥浆充填,水泥消耗量大,成本高。信湖煤矿中央风井采用钻井法凿井,井筒第2段高壁后充填采用水泥浆和水泥砂浆2种材料,即用水泥砂浆替代部分水泥浆,达到了预期效果。简要介绍了水泥砂浆地面水平泵送试验及其与水泥浆性能对比试验和水泥砂浆壁后充填情况。     

碎石胶结充填料配比的优化

对高龙金矿下向分层进路胶结充填采矿法所用的充填材料进行了室内试验研究。试验内容包括充填骨料物理性能测定和胶结充填材料配忆试验。通过试验,优化了碎石胶结充填材料配比。     

碎石混凝土抛掷充填新工艺和新设备

针对倾斜破碎矿体开采中管道输送充填工艺存在的问题，采用碎石混凝土抛掷充填新工艺，提高了充填体质量和充填接顶率，降低了矿石贫化率和损失率，取得了良好的技术经济效果。本文全面地介绍了碎石混凝土抛掷充填工艺，并阐述了ＰＣ－１型抛掷机的结构、性能和工作原理。     

全粒级碎石水泥浆胶结充填质量控制

在分段碎石胶结充填法试验研究过程中，在国内首次试验采用自然级配碎石胶结充填料自然混合、铲运机充填新工艺技术，充填体质量控制好坏直接影响着充填体强度、充填体抵抗爆破震动破坏的能力、充填体的自立稳定性和充填成本。本文详细论述了分段碎石胶结充填体质量影响因素与充填体质量保障措施。     

块石胶结充填工艺中关键技术参数的控制

以云南锡业集团公司块石水泥浆胶结充填采矿法为例,阐述了实际生产试验中,对块石水泥浆胶结充填工艺的实施和充填工艺参数的控制,使充填体强度达到1.5~7.2MPa,满足采矿所需强度和自立高度的要求,实现了"深、小、富"矿体的安全高效回采。     

富家矿充填工艺的选择与碎石胶结充填的实践

充填采矿法是防止地表塌陷和提高矿石回采率的有效方法,但充填采矿法增加了充填工艺,尤其胶结充填矿山的充填成本较高.因此,寻求降低充填成本的工作愈显重要.通过从碎石充填的含泥量,充填料浆浓度、骨料级配几方面进行研究实践,寻找出碎石胶结充填水泥掺量、骨料含泥量、充填料浆浓度、充填体强度之间的关系.     

钻井法凿井壁后充填对竖向附加力的影响

钻井法凿井由于它的工艺特点，井壁悬浮下沉安装后，与地层之间大部分隔着１层粘结性很差，强度很低的水泥浆充填物物或呈饱和状态自然堆积的碎石与泥浆的混合物，它与井壁之间的摩阻力小于其它方法施工的井筒与 层之间的摩阻力。通过模型试验数据，论述了不同壁后充填条件下井壁与地层之间摩阻力的大小，提出了在充分考虑井筒延深或开凿马头门安的前提下，应根据地层条件进行合理的充填段划分，并采用相应的充填材料和工艺，以减少     

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。