矿井长距离掘进工作面通风技术研究

为更好地保障矿井长距离掘进工作面的安全生产,做好矿井长距离掘进工作面的通风工作必不可少,对此,介绍了矿井长距离掘进工作面通风的主要形式,提出了矿井长距离掘进工作面通风方法的选取流程,以期有助于矿井长距离掘进工作面更科学、更合理地选取通风方式,进一步提高矿井长距离掘进工作面通风效果,更好地保障矿井安全生产。     

基建矿井掘进工作面危险源及预防对策分析

以基建矿井为工程背景,以掘进工作面危险源为研究内容,从分析基建矿井掘进工作面特点入手,得到了基建矿井掘进工作面的各个特点,在此基础上分析得出了基建矿井掘进工作面面临的灾害威胁类型,并分析了造成威胁危害的可能原因;最后提出了预防基建矿井各类威胁危害的技术措施。     

矿井超前精细探测技术方法与应用

为了预测煤矿掘进工作面的水害,采用矿井瞬变电磁法、矿井直流电法、矿井瑞利波法、矿井反射波法4种井下超前探测技术。通过井下数据采集、处理和反演计算,形成可视化图件,来解释矿井含水体及构造的范围和位置特征,建立了一套适合煤矿掘进过程中井下物探动态监测水害的技术方法。结果表明:矿井瞬变电磁法可探测掘进工作面正前方、前方顶板、前方底板和前方侧帮含水体;矿井直流电法可探测掘进工作面正前方含水体;矿井瑞利波法(或矿井反射波法)可以探测前方构造及采空区边界。     

掘锚一体机远程控制技术在冲击地压矿井快速掘进中的应用

为了精准、高效地确定掘锚一体机的控制量和控制方向,保证掘进安全性,优化设计冲击地压矿井快速掘进方法。通过分析矿井的内在、应力和结构条件,预测矿井冲击地压。基于掘锚一体机组成结构、运动特征以及动力原理,构建掘锚一体机数学模型。根据冲击地压矿井结构和冲击地压约束条件,规划掘锚一体机掘进路径,利用设计的远程控制器控制掘锚一体机的位姿和速度,完成冲击地压矿井的快速掘进任务。测试结果表明：应用掘锚一体机远程控制技术后,冲击地压矿井的掘进裂隙面积缩小了4.87 m2,掘土量提高了62.9%,能够将矿压控制在16 MPa以下,在掘进质量、速度和安全性三方面具有明显优势。     

优化矿井掘进管理的创新实践

如何加强掘进生产管理,保障矿井正常生产接续,对于薄煤层万吨掘进率高的矿井有着极其重要的意义。赵官能源积极探索优化矿井掘进管理的新方法、新途径,把市场机制引入掘进生产管理,从强化生产准备,突出综掘设备维护保障入手,通过整合掘进施工力量、优化资源配置,把工作纳入规范化、制度化管理轨道,以掘进带动全盘,促进了矿井各项工作的健康协调发展。     

连采机掘锚一体化快速掘进施工工艺研究

随着高产高效矿井成为我国矿井建设新的发展方向,巷道尤其是煤巷的掘进速度成为了矿井高产高效生产的一个制约因素。而连续采煤机作为一种新型的巷道掘进设备,具有巷道掘进速度快、成型好、掘进工艺简单、设备故障率低等优点,对于煤层赋存简单的矿井将会大大提高其掘进速度。本文针对河曲磁窑沟煤矿的地质条件,探讨该矿掘进、支护工艺参数的合理取值。     

深部高温矿井大断面岩巷TBM智能掘进技术——以“新矿1号”TBM为例

我国中东部众多矿区相继进入深部开采,面临着采掘接续紧张的突出问题。大断面岩巷TBM掘进以其智能化程度高、作业安全、掘进效率高等特点已逐渐应用于浅部矿井,在深部矿井中却应用极少,匮乏建设经验。因此,为研究深部矿井岩巷TBM智能高效掘进技术,提升深部矿井机械化、智能化建设的水平,山东新巨龙煤矿研发了大断面岩巷TBM智能掘进系统("新矿1号"),系统集成了掘进、出渣、支护、除尘、通风、降温、导向、防爆、防冲等技术于一体,实现了深井直径6.33 m硬岩巷道智能掘进、掘进时锚杆自动化施工、掘支平行作业等技术。基于此,综述了深部高温矿井TBM全断面硬岩掘进机应用的关键技术,主要包括:(1)适用于深部高温矿井的岩巷TBM掘进装备建造模式;(2) TBM大尺寸部件的大埋深、长距离运输与安装技术;(3) TBM智能掘进技术;(4)深井超大断面安装硐室和掘进巷道围岩稳定性控制技术;(5)深部高温高地应力矿井TBM智能掘进综合保障技术,包括:TBM通过高应力软岩破碎带等不良地层的地质预报、降温、除湿、降尘等技术。旨在通过论述该设备的研发和应用过程,提出深部矿井硬岩TBM掘进的难点和解决方法,为类似矿井采用T...     

小块段区域抽采在煤矿瓦斯治理的应用

结合岳城煤矿掘进工作面瓦斯治理不同阶段的方法和效果,阐明了小块段区域密集钻孔抽采在高瓦斯矿井掘进工作面实施的原理和作用.提出了高瓦斯矿井掘进工作面瓦斯治理的对策和建议.     

矿井巷道掘进率影响因素分析

就影响矿井巷道掘进串的诸多因素进行了逐一分析，得出了主要影响因素与掘进率间的定性、定量关系。可为矿井采掘接续、降低矿井巷道掘进率提供理论依据。     

煤、油共生条件下煤矿巷道掘进技术探析

巷道掘进是矿井采煤工作的重要一环,随着采煤的不断发展加快,巷道掘进技术已成为制约矿井高效生产的主要因素之一。采用理论分析与掘进实践经验结合的方法,以矿井巷道掘进为研究对象,综述我国采煤掘进工艺的变革,展望了矿井巷道掘进掘锚一体化工艺、综掘自动化、快速掘进技术为发展的大势所趋。最后,分析油、气对采掘的3种主要危害,即油气爆炸、煤油共燃、油气中毒。在此基础上结合矿井采掘实际情况提出具体预防、控制措施,主要为:①打钻排油放气;②加强通风管理;③加强防尘措施;④及时清洗金属支架和支柱。     

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。