深部矿井运移灾变机制及其控制研究

矿井灾害包括煤与瓦斯突出、冲击地压、瓦斯(煤尘)爆炸、大面积冒顶和矿井突水淹井等,严重威胁着煤矿安全高效生产和矿山工作人员的生命安全,各种矿井灾害不仅互相联系,而且出现规律具有许多相似之处。从探讨矿井灾害共性问题的角度,通过分析采场大范围岩体系统的物理力学性能、系统结构、地质及技术环境、动态变化过程与能量之间的相互联系和演化机制,探讨了矿井灾害发生的基本模型,阐述了矿井灾害的发生机制;随后,分析了矿井灾害的运移灾变机制,把矿井灾害在深部矿井开采中统分为运移灾害(能量运移灾害、水体运移灾害、气体运移灾害)和固体物理机械灾害;最后,基于运移灾变机制,提出有效辨识和控制运移灾害必须明确的问题及相应的控制思路。     

地理信息系统在矿井灾害应急救援中的应用

通过研究矿井灾害救援技术和地理信息系统,建立了基于GIS技术的矿井灾害应急救援系统,以及内容丰富的矿井灾害应急救援数据库和知识库,实现了矿井地图的可视化管理,动态模拟演示各种事故的避灾路线,为灾害预防和处理提供了有力的技术支持。     

井下湿热灾害治理技术

该文针对矿井普遍存在的湿热灾害现象进行了调查分析,弄清了灾害的来源,阐述了湿热灾害给人体及机电设备带来的危害,为有效防治湿热灾害给矿井安全生产和职工身体健康造成的影响,重点介绍了矿井湿热灾害的处理方法,并分析了湿热灾害治理技术带来的经济效益和社会效益。     

我国煤矿深部开采现状及灾害防治分析

为保障深部矿井的安全生产,对全国采深超过800 m的深部煤矿开采现状及面临的灾害类型进行了调查统计,给出了目前深部矿井的数量及产能分布情况;分析了影响深部矿井灾害的地质力学因素(高地压、高地温、高水压、高瓦斯、低煤岩渗透性)和开采强度因素,并对全国主要深部矿井的灾害属性进行了分类统计。结合近5年来深部矿井发生的灾害事故,得出瓦斯灾害是深部矿井的第一大灾害,复合型灾害是深部矿井的新特征,复合型灾害事故程度比单一型灾害程度更高。最后对目前深部煤矿灾害防治技术及装备进行了评价,针对深部开采面临的主要困难和问题,提出了相应的发展建议。     

基于大数据的矿井灾害预警模型

将大数据技术与煤与瓦斯突出、矿井水害、矿井火灾、矿井顶板灾害预防机理相结合,建立了基于大数据的矿井灾害预警模型;提出了各项灾害的预警模型,探讨了数据挖掘Apriori关联算法在灾害预警中的实现方法,并阐述了利用大数据进行灾害预警的步骤。     

矿井灾害现象的非线性动力学

以非线性是矿井灾害系统的本质特性为依据，分析了若干典型矿井灾害现象的非线性机制，指出了矿井灾害系统动力学行为与对应的非线性动力系统动力学特性的对应关系，初建了非线性矿井灾害学理论．     

我国矿井热动力灾害理论研究进展与展望

为给我国矿井热动力灾害的科学发展提供决策参考,促进我国矿井热动力灾害理论研究与防控技术安全绿色高效发展,对"矿井热动力灾害"进行了定义和分类,分析了我国矿井热动力灾害的特性,总结归纳了我国矿井热动力灾害理论研究的现状与进展,指出我国现阶段矿井热动力灾害理论研究存在以下主要问题:(1)各类热动力灾害间的耦合致灾机理尚不清楚;(2)灾害复杂致灾体系的基础研究尚不深入;(3)灾害叠加效应的理论基础尚不明确,未建立灾害叠加效应防控机制;(4)缺乏继发性灾害发生诱导机制的抑制理论与技术;(5)灾害环境探测技术亟待提高,继发性灾害隐患情况下的应急救援技术不成熟;(6)缺乏高效快速经济的隐蔽灾害探测方法与技术;(7)尚未建立矿井热动力灾害一体化综合防控体系。最后对矿井热动力灾害理论研究的发展方向进行了论述与展望,指出了未来我国矿井热动力灾害理论研究的重点研究领域:(1)灾害复杂体系基础理论;(2)各类灾害之间的耦合致灾机理;(3)灾害叠加效应与继发效应诱导机制;(4)隐蔽致灾因素准确探测理论与技术;(5)灾变期间的应急救援技术;(6)矿井热动力灾害"安全-绿色-高效"一体化综合防控技术体系。     

基于GIS的煤与瓦斯动力灾害预警系统研讨

将地理信息系统(GIS)引入到矿井煤与瓦斯动力灾害防治中,借助GIS技术实现矿井煤与瓦斯灾害隐患的识别,通过模糊综合评判的方法实现灾害的预警与决策,为矿井生产和管理提供先进的手段。对GIS技术在矿井瓦斯动力灾害预测上的应用进行了研讨,该系统为煤与瓦斯灾害的预测预报提供一种决策支持方法。     

滕南矿区矿井水灾害链及断链减灾研究

针对我国煤矿开采矿井水害频发现象,运用灾害链理论研究滕南矿区矿井水灾害链作用机理,提出孕育断链减灾方法。综合分析滕南矿区水文地质条件及矿井水灾变特点,发现矿井水灾害链发育3个阶段,即灾害孕育阶段、潜存阶段、诱发阶段。通过对矿井水灾害链式作用机理研究,发现滕南矿区是由原生灾害、次生灾害、派生灾害组成的复杂灾害链系统。运用层次分析方法分析矿井突水影响因子权重并对矿井水灾害性分区,采取时间序列分析不同工作面涌水量,从而判断矿井水灾害链发育阶段,提出孕源断链减灾措施。     

滕南矿区矿井水灾害链及断链减灾研究

针对我国煤矿开采矿井水害频发现象,运用灾害链理论研究滕南矿区矿井水灾害链作用机理,提出孕育断链减灾方法。综合分析滕南矿区水文地质条件及矿井水灾变特点,发现矿井水灾害链发育3个阶段,即灾害孕育阶段、潜存阶段、诱发阶段。通过对矿井水灾害链式作用机理研究,发现滕南矿区是由原生灾害、次生灾害、派生灾害组成的复杂灾害链系统。运用层次分析方法分析矿井突水影响因子权重并对矿井水灾害性分区,采取时间序列分析不同工作面涌水量,从而判断矿井水灾害链发育阶段,提出孕源断链减灾措施。     

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