淮南煤田构造煤发育特征分析

基于煤田地质钻探资料和煤矿井开发成果,分析了构造煤的特征,探讨了构造煤发育程度与煤、岩组合及构造演化的关系,指出了层间滑动是导致区域构造煤分布、断层是导致局部构造煤分布的主控因素.     

视错动正、逆断层的划分标志和表现特征

阐明了视错动正、逆断层的涵义与划分标志 ,分析了断层与煤 (岩 )层的不同产状交切关系下视错动正、逆断层的表现特征。     

我国矿井断层防水煤(岩)柱留设研究现状与展望

我国煤矿底板突水事故中断层水害占绝大部分,断层防水煤(岩)柱留设是预防断层水害的主要手段,关系到煤矿的安全、高效生产。留设合理的断层防水煤(岩)柱宽度不仅可以防止地下水通过断层涌入矿井,还可以服务煤炭资源的合理、安全开采。断层防水煤(岩)柱宽度留设涉及到许多因素,也是许多学者和工程技术人员研究的重点之一。截止到目前已有多种研究方法与手段得到了应用,主要包括理论计算、多元回归分析、BP和RBF、相似模拟、数值模拟等,针对不同断层条件下的煤(岩)柱留设问题进行了具体研究。在此基础上对断层煤(岩)柱留设研究现状进行总结,指出其存在的问题并展望了今后研究的技术与方法及发展前景。     

中马村矿二_1煤的煤层气地质学特征研究

在成煤作用中后期,含煤岩系经历了多期构造运动,煤岩体发生不同程度的破坏变形,导致煤层的含气性、渗透性及物理力学性质产生差异,直接影响煤层气开发工艺的选择和瓦斯抽采技术的实施。通过分析矿井煤田勘探和实际生产资料,结合实验室测试和井下踏勘,探讨了中马村矿二_1煤的煤层气地质学特征。结果表明:储层具有赋存稳定,厚度较大,含气量高,渗透性差,煤体结构软硬互层,异常高压储层分布范围广的特征,现今煤层气的含气量及其分布特征,受控于地质演化时期的生烃演化及构造和封闭条件。煤层的埋藏史经历了5个阶段,新近纪至今的沉降使得理论含气量有所增加,有利于煤层气的富集。煤层气含气量受断层控制明显,压扭性断层及封闭性断层附近具有高的含量,并且这些区域也是煤与瓦斯突出频发地区;开放性断层附近含量较低;煤层的直接顶板岩性为泥岩和砂质泥(页)岩,为煤层气的保存提供了有利条件。     

一平浪煤矿抗八井南区局部性标志层在K1b煤层生产中的应用

标志层，作为煤系地层形成过程中具有一定特殊结构、颜色、岩性的煤岩层，在煤矿生产中，对煤层对比、断层等地质构造的判断具有准确、快捷、方便等诸多特点，成为地质工作中最常用、最有效的方法。特别是在断层的处理过程中，不管用什么方法寻找到断失煤翼的方向，最终都要落实到煤岩层的对比之上，以保证各种地质成果的准确性。     

平煤十三矿构造煤发育特点与分布规律

构造煤研究是开展瓦斯地质工作的重要内容，其对煤与瓦斯突出预测至关重要。采用煤壁观测和钻孔取心分析的方法，对平煤十三矿构造煤发育和分布特点进行梳理总结，构造煤具有2~3层软弱分层，层状、似层状分布，软煤类型以粉状和糜棱为主，主要受构造的落差、走向、断层性质控制。此外，构造煤发育程度和厚度还与倾角、褶皱、夹矸等多种地质因素有关。采用煤壁观测记录和钻孔取心方法对其进行调查研究，初步掌握了其特征和分布规律，为今后安全生产提供技术参考。     

94112工作面小断层预测的实践

山西组9煤为权台煤矿主要配采煤层，受权台向斜及井田大中型断层的控制，地质构造复杂，小断层发育。通过对权台井田山西组9煤开采过程中揭露的小断层特征的综合分析，揭示了小断层的展布规律。并结合下石盒子组3煤及9煤邻近采区小断层的发育规律，对权台煤矿北一采区-800m水平94112工作面小断层进行了定量预测：该面掘进过程中将穿过2个构造异常区，揭露小断层14～16条。通过对小断层的预测，为工作面施工提供了准确的地质资料，同时对今后9煤新区开采地质工作具有一定的借鉴作用。     

邓家冲区段F1断层特征及其对煤层的影响

通过对邓家冲区段地质资料的分析研究,探讨了其地质构造特征及其成因,认为邓家冲区段断层发育,对本区煤层影响最大的为F1断层。F1断层为永耒向斜西翼区域性大断层,为顺层走向逆冲推覆断层。F1断层的走向大致沿地层走向延伸,倾向与地层基本一致,倾角11°～58°,一般为40°,断层面呈舒缓波状。F1断层主要发育于龙潭组上段中上部,受层状软弱结构面空间分布情况控制,位于6煤层顶板疏松砂岩之上。在强大构造应力场作用下,F1断层上盘地层位移大,构造较复杂,煤层部分或全部缺失;下盘构造相对简单,疏松砂岩是下部煤层的良好保护层,使煤层保存完好。运用推覆构造理论在构造（F1断层）下找煤成功,推翻了以往地质工作认为本区无找煤前景的观点。对新区在推覆构造下找煤具有重要的的指导和参考意义。      

考虑导水裂隙带影响的导水断层防隔水煤柱优化计算

大部分煤层底板突水都与断层有关,留设断层防隔水煤(岩)柱是防止断层突水的重要措施。通过综合分析《煤矿防治水细则》有关防隔水煤(岩)柱计算原则,认为导水防隔水煤(岩)柱留设除考虑煤层底部隔水层能否承受下部含水层水(断层水)的压力和断层水在顺煤层方向上的压力外,还应当考虑顶板导水裂隙带到断层之间岩柱能否承受断层水的压力,同时考虑煤层产状及与断层面的空间关系,从而推导出了顶板导水裂隙影响的导水断层防隔水煤(岩)柱计算公式。通过实际计算对比发现,优化后公式计算结果准确,能够为矿井在断层附近安全开采提供更科学的依据。     

煤基活性岩的原料煤适应性

选取三种性能差异较大、有代表意义的依兰精煤、太西无烟煤和四川无烟煤为原料，通过适当地调整工艺参数，在实验室生产出具有较好吸附性能的活性岩，迹表明煤基活性岩具有较广泛的原材料煤适应性；试验证明，原料煤的性质不同，生产出的活性。炭有不同的孔径分布和吸附特点。     

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