FTA-SCL在“矿井通风系统不可靠”评价中的综合应用

运用事故树分析法对"矿井通风系统不可靠"问题进行定性分析和评价,最大限度地找出影响矿井通风系统稳定性和可靠性的危害因素,综合应用事故树法和安全检查表法,从通风系统管理、主要通风机管理、局部通风管理和通风设施管理4个环节进行了深入分析和评价,增大了矿山企业日常安全检查工作的力度和深度,有利于提高矿井通风系统在灾变时期的应变能力。     

矿井局部通风故障诊断系统开发研究

针对矿井局部通风系统故障诊断缺乏信息支持的问题,文章采用可靠性理论对矿井局部通风系统的故障模型树进行了分析;采用智能决策与UML语言对矿井局部通风故障诊断系统总体结构进行了建立,并采用SQL、JAVA语言对系统原型软件进行了开发,对煤矿实例进行了应用示范。论文研究为煤矿局部通风系统故障诊断提供了信息支持,对提高煤矿安全管理有重要的意义。     

浅谈矿井通风在煤矿安全生产中的重要性

分析矿井"一通三防"事故原因,指出矿井通风对煤矿安全生产的重要性,论述如何从人员管理、通风设施、技术指导、队伍建设等方面做好矿井通风管理,使通风系统合理、稳定、可靠,减少事故隐患,杜绝事故的发生。     

坪湖矿“11.1”火灾事故的事故树分析

针对丰城矿务局坪湖矿"11.1"火灾事故,根据安全系统工程原理和系统工程技术中的事故树法原理建立了火灾事故树,求出最小割集和最小径集。根据事故树数据,取原事故树的右部分支进行延伸和修改,求出其概率重要度和关键重要度,得到各个影响因素影响程度。最终得出皮带摩擦造成高温引燃附近可燃物是外因火灾发生的直接原因,井下通风系统自救系统的隐患是造成火情扩大的重要原因。根据关键重要度结果和事故树结构分析,发现通过对通风系统和安全生产管理进行控制是防止火情扩大的有效途径。     

基于计算机信息化的煤矿通风技术研究

煤矿通风是保证煤矿开采工作安全进行的最基本因素。通风情况的好坏直接影响到矿工的安全及健康、矿井的生产效率和经济效益。但是大多数煤矿事故调查结果表明,煤矿发生的重大灾害事故,一般都与矿井通风系统有着密切的联系。矿井通风系统是煤矿安全的关键性环节,因此,一个稳定、可靠、简单的通风系统就显得尤其重要。引入计算机这个重要媒介,可以更好地控制煤矿通风这一重要环节。     

如何搞好矿井“一通三防”安全管理工作

该文论述了矿井通风在煤矿安全生产过程中的重要性;阐述了搞好矿井"一通三防"工作应建立健全通风管理机构及制定各项管理机制;论证了矿井通风管理与煤矿发生瓦斯事故、煤尘爆炸事故以及矿井火灾事故的内在因果关系。     

矿井通风能力核定方法的探讨

科学地进行"以风定产",其核心是矿井通风能力核定,它是实现矿井安全生产的重要保障和前提之一。通过对现行《煤矿通风能力核定标准》中的小型矿井通风能力核算方法存在的问题分析,建议矿井不分井型大小,均可采用由里向外核算法确定矿井通风能力。提出了一套新的煤矿通风能力核定方法,核定的方法和内容更符合煤矿安全生产实际。     

浅谈优化矿井通风与安全生产的关系

优化矿井通风系统对煤矿安全生产和节能降耗、降低成本有着非常重要的作用。从汝箕沟煤矿的生产特点出发,对矿井通风系统优化的必要性,迫切性进行分析,提出矿井通风系统优化的主要方法,由此得出矿井通风系统与煤矿安全生产的密切关系。     

同步法测定矿井通风阻力在甘庄煤矿的应用

矿井通风阻力测定是煤矿安全生产的重要内容,通风阻力的大小直接影响着矿井的通风效果。根据甘庄煤矿通风系统实际情况,运用同步法对其进行了通风阻力测定,并对测定结果进行了科学分析,为今后矿井通风系统科学管理提供了依据。     

基建矿井二期工程通风设计

文章介绍了基建矿井在永久通风系统形成前,二期工程通风系统设计及应用技术。依据《初步设计》、《煤矿安全规程》以及通风能力核定的有关规定,主要对永久通风系统形成前施工阶段的局部通风、瓦斯管理、监测监控、综合防尘等进行设计。     

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