马头岭井田二叠纪含煤岩系分布赋存规律

在马头岭井田新发现一个滑覆构造和白垩系红层掩盖下的二叠系上统龙潭组含煤构造。含煤地层分为上下两段,上段煤系一般厚250 m,由于断层破坏和白垩系红层剥蚀而保存不完整,主要可采煤层为6煤和7煤,煤层主要赋存于井田中部和南部。6号和7号煤层均为中灰、特低硫和中发热量的无烟煤。近南北向和北北东向的断裂为正断层,对马头岭赋煤向斜构造造成切割破坏,使西翼浅部煤层未能保存。     

内蒙古准格尔煤田玉川井田煤质特征及利用方向评价

玉川井田位于准格尔煤田南部,井田含煤地层为山西组和太原组上部,含可采煤层5层,主要可采煤层为6上和6号煤层,属较稳定类型。井田基本构造形态为-宽缓的背斜,构造复杂程度属简单类型;井田内煤层属中灰、低硫-中硫、低磷、中低-高发热量的长焰煤,是良好的动力用煤。     

前岭煤矿岩浆岩对煤层破坏规律的研究

本文从前岭井田岩浆岩产状及分布，岩性与结构及成因入手，总结分析了前岭井田岩浆岩对煤层破坏作用及其规律，提出了该井田岩浆岩侵蚀区找煤的一般规律。     

贵州五凤井田煤层煤质特征分析

分析了贵州五凤井田龙潭组上含煤段煤层的煤质特征,指出该井田内6中煤层属于中灰分、较易脱除中高黄铁矿硫、特低磷、高热值、中等结渣性、中等可磨和高热稳定性三号无烟煤。     

嘉禾县袁家矿区浦溪井田龙潭组沉积环境分析与找煤

嘉禾县浦溪井田位于袁家矿区中段,其煤系地层龙潭组为一套湖沼—泻湖海湾过渡相为主的沉积,厚度14.9～335m,含煤7层,煤层总厚5.25～7.85m;根据岩性、岩相特征分为上下两段,下段为不含煤段,为泻湖相沉积,平均厚187m,上段泻湖—湖沼相沉积,平均厚137m,并形成了泥炭沼泽,形成了2、3、4、5、6、7号煤层,可采煤层为2、5、6号煤层,其中,形成于滨海沼泽地区的5煤层厚度稳定,是该地区主采煤层,下段厚度比上段厚度要大,反映了该区晚二叠世期间地壳沉降不均衡,沉积环境差异是本区找煤条件的主要控制因素。     

赵庄井田3号煤层煤体结构特征

文章运用钻孔岩芯、f值、测井技术综合判识赵庄井田煤层煤体结构,结果显示:该区3号煤层煤体结构主要以原生-碎裂结构为主,且在构造破坏区域,上部煤层煤体较硬,发育原生结构、碎裂结构煤,下部煤层煤体较软,发育碎粒结构煤。     

皖北前岭煤矿瓦斯动力现象的基本特征

总结分析了皖北前岭煤矿煤与瓦斯突出现象及基本特征,确定了同一井田在煤层瓦斯含量等相近的条件下,煤体结构的破碎是影响煤与瓦斯突出的主要因素,同时提出了在煤层滑褶构造区,滑褶构造体的前端因局部残余构造应力集中和煤层增厚而成为煤与瓦斯强突出区的观点。     

浅谈伍家煤矿煤巷掘进工作面的综合防突措施

1 概述 伍家煤矿属英岗岭矿区一座有煤与瓦斯突出的矿井.设计生产能力为10万t/a,井田走向长3700 m,南北宽1300 m,面积4.8 km2.矿总体为一单斜构造,但在井田内部发育有一些次一级的褶曲和断裂,断层以正断层为主.只有老山下亚段的6#煤层为主采煤层,其煤层变化大,倾角一般为25°～30°,结构较为简单,顶底板较为破碎.     

浅析宁武县梨园河煤矿井田地质及煤炭资源特征

井田位于宁武煤田北端。2、5号煤层为主要可采煤层,3、6号煤层为次要可采煤层。2号煤层原煤为中灰、中硫、中高发热量的气煤为主,3号煤层原煤为中灰、低硫、中高发热量之气煤,5号煤层原煤为中灰、中高硫、中高发热量的气煤为主,6号煤层原煤为中灰、中硫、中发热量之气煤。井田生产的原煤可作动力用煤及炼焦配煤,也可用作炼油用煤。     

对芭蕉岭井田地层层位及主要构造的不同认识

芭蕉岭井田与安源井田毗邻。在两井田接图时,有两大问题图纸无法衔接和合理解释。一是含煤地层层位问题;二是RF2断层是否应该继续西延并由此对井田构造形态的解释问题。通过两井田含煤地层及煤层特征的对比,地层间不整合或假整合存在的确定以及勘探钻孔的分析,提出了芭蕉岭井田含煤地层的层位应属安源组三丘田段(T3a3)、RF2断层应该向西延伸,将王坑倒转向斜的南翼切割成上下两盘,下盘含煤地层为三丘田段,上盘地层为紫家冲段(T3a3)的不同认识。     

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。