五矿锅底山断层区域己_(16-17)煤层瓦斯赋存规律分析

运用瓦斯地质理论和方法,依据锅底山断层形成机理及其发育规律,结合断层区域内煤层厚度、同生和次生构造以及构造煤的分布特征,将断层区域己16-17煤层划分为2个地质单元,锅底山上盘和锅底山下盘。依据断层区域内己16-17煤层地勘瓦斯含量和实测瓦斯含量数据,分析2个地质单元的瓦斯赋存特征,即相同标高下锅底山断层上盘煤层瓦斯含量较下盘高。研究得出地质构造、煤层埋深和构造煤分布是矿井己16-17煤层瓦斯赋存的主要控制因素,即煤层瓦斯含量整体上随煤层埋深的增加而增加,但由于受锅底山断层构造活动影响,瓦斯含量分布又具有一定的差异性。     

煤层瓦斯赋存特征及其关键地质因素影响研究

地质构造对瓦斯涌出有着明显的控制作用,以西山煤田屯兰煤矿为研究对象,通过分析煤层埋藏深度、围岩条件、水文地质、煤的变质程度、地质构造等地质因素的影响,发现断层是控制瓦斯赋存的关键因素。根据断层分布特征,将屯兰煤矿分为4个相对独立的地质单元,基于实测数据,分析了各地质单元内断层分布及其组合方式、局部小断层等对瓦斯赋存规律的影响作用,并以屯兰煤矿工作面瓦斯涌出量实测数据进行了验证。结果表明:屯兰煤矿煤层瓦斯赋存主要受埋深与NE方向断层的控制;区域构造对瓦斯赋存影响明显,断层及断层的组合方式使得矿井局部瓦斯含量出现异常;工作面瓦斯涌出量与地质构造存在密切的联系,在靠近大断层和局部小断层时瓦斯涌出量显著增加;地质单元的划分对地质构造复杂的煤与瓦斯突出矿井具有重要意义。     

大柳塔矿井f2断层的基本地质特征及对回采的影响

在分析大柳塔矿井f2断层地质特征的基础上，总结了断层的分布规律，剖析了该煤层对煤炭开采的影响和造成的损失，并对本矿区的煤炭资源勘探、开采设计提出一些原则性建议。本文介绍的断层规律及工作面的布置原则对类似地质条件矿区的矿井地质工作、勘探工作、开采设计有一定的参考意义。     

大柳塔矿井f2断层地质特征及对回采的影响

在分析大柳塔矿井f2断层地质特征的基础上,总结了断层的分布规律,剖析了该煤层对煤炭开采的影响和造成的损失,并对本矿区的煤炭资源勘探、开采设计提出一些建议。     

长平矿3煤层瓦斯赋存主控因素分析

为了进一步厘清长平矿瓦斯地质赋存规律,有效指导长平矿采掘巷道合理部署和瓦斯防治工作,运用瓦斯地质学相关理论,通过对长平煤矿3煤层地质、构造分布等对煤层瓦斯赋存的影响分析,最终确定断层、褶皱、陷落柱为3煤层瓦斯赋存的主控因素,并建立了长平矿3煤层瓦斯含量预测模型,可有效指导矿井实际生产,杜绝瓦斯灾害事故的发生。     

保利金庄煤矿矿井地质条件研究

矿井地质条件是影响煤矿建设与生产的重要地质因素。分析了山西保利金庄矿井地质构造情况,对褶曲、断层、陷落柱发育情况进行了研究,研究了煤层发育及煤质特征,划分了矿井的水文地质类型和瓦斯类型。     

综合物探技术在天祝煤矿中的应用

随着矿井机械化采煤的不断发展及机械化程度的不断提高,对矿井地质工作的要求也越来越高。但煤矿生产机械化的致命弱点之一是不能适应地质情况的变化。此外,在矿井开拓掘进过程中,有越来越多的地质问题需要解决,尤其是煤层厚度、断层和煤层分叉等具体地质特征。天祝煤矿地质条件复杂,煤层分叉且尖灭严重,且断层多构造较复杂,给巷道布置、掘进和工作面正常回采带来较大困难。利用矿用瞬变电磁法和矿井地震波法进行超前预测预报,给矿井巷道布置提供更加科学合理的建议。     

新店西二勘查区构造控煤特征分析

依据新店西二勘查区的地层、煤层及总体构造特征,分析了断层构造因素对煤层赋存和分布的控制作用。研究认为本区煤层赋存状态、分布规律及煤厚与构造形态有着密切的联系。断层控煤因素不仅控制了本区主要的可采煤层的赋存深度和分布格局,而且引起其厚度和煤质变化。加强对本区构造的研究,将为以后矿井建设开发布局、安全生产提供科学的地质依据。     

演马庄矿井瓦斯地质规律研究

为了研究演马庄矿井瓦斯赋存地质规律,采用瓦斯赋存构造逐级控制理论,研究了矿区地质构造控气特征,提出构造分区控制瓦斯分区的瓦斯分布特征;基于矿井地质构造特征,定性、定量分析了影响矿井瓦斯赋存的主要地质因素,预测了瓦斯含量、涌出量,编制了矿井瓦斯地质图。结果表明:井田具有张裂隙延展方向总体为NE向、NNE向展布的马坊泉断层为分划性断层,富水性强的L8灰岩为瓦斯运移的主要通道,构造煤主要分布于煤层的顶板的瓦斯赋存地质规律。     

贵州青龙矿瓦斯赋存与突出影响因素分析

在贵州青龙煤矿瓦斯地质条件综合分析的基础上,通过矿井瓦斯含量、瓦斯压力和煤与瓦斯突出等特征的深入分析,探讨了区域演化、煤层顶、底板岩性、煤层埋深和矿井构造对瓦斯赋存和突出的控制作用。结果表明,区域沉积演化的特殊性是造成整个贵州西部地区瓦斯含量较大的主要原因;矿区内瓦斯分布的整体趋势受煤层埋深的控制,而瓦斯含量分布不均匀性主要受矿井构造的影响。     

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