柳树箐磷石膏尾矿库在线安全监测方案设计

尾矿库安全监测是获得尾矿库运行中的各种准确数据,适时掌握尾矿库运行状态,指导尾矿库安全运行管理,预防生产事故的重要手段。通过分析我国安全监测研究现状,论述了尾矿库全程在线安全监测系统的必要性和国内尾矿库安全监测发展的态势,提出并制定了坝体表面位移变形监测(磷石膏坝和水工坝)、坝体内部位移监测、浸润线监测、干滩监测、库水位监测、雨量监测、浊度监测等主要监测项目的在线安全监测方案,为后期安全生产提供保障。     

攀钢中沟湾尾矿库中线法筑坝工艺试验研究

为验证攀枝花中沟湾尾矿库中线法筑坝的工艺设计参数, 开展了中线法筑坝工业试验。进行了旋流器工况参数优化试验, 优选出满足现场筑坝试验条件的旋流器工作参数, 并分4层完成了试验坝体的构筑;对固结尾砂进行取样分析及物理力学测试, 同时在试验区域内布置浸润线在线监测系统, 以监测坝体水位线变化。结果表明, 试验底流粗砂含量高, 渗透性能较好, 固结强度高, 堆积坝坝体内的浸润线埋深较低, 符合设计规范要求。研究成果验证了中沟湾尾矿库中线法筑坝工艺和参数的可行性, 也为类似尾矿库中线法筑坝提供了借鉴。     

尾矿库在线监测系统浸润线预警阈值计算方法研究

尾矿库堆积坝浸润线的埋深与坝坡安全直接相关,对照《尾矿设施设计规范》GB50863-2013中有关控制浸润线的要求,整理了浸润线预警阈值的计算方法和逻辑控制关系,并结合实际工程,建立了浸润线计算模型,研究了浸润线最小埋深与稳定性、渗流边界等的关系,为尾矿库在线监测系统浸润线预警阈值的设置提供了依据。     

基于粗糙集与贝叶斯决策的尾矿坝浸润线预警

为支持尾矿库的现场安全监管与决策,根据粗糙集和贝叶斯决策理论,提出了基于不确定性的尾矿坝浸润线预警方法以确定合理的尾矿坝浸润线预警阈值。首先,根据尾矿渗透性与干滩长度的不确定性对坝体稳定性的影响,计算得到离散尾矿坝体安全系数对应的浸润线的多点位(埋深)数据;其次,以粗糙集属性重要度分析为前提,采用贝叶斯决策法建立坝体安全系数与浸润线埋深的多属性决策模型,以互信息熵表示安全系数对浸润线多点位埋深数据的依赖程度;最后,用条件概率量化浸润线重要点位对尾矿坝稳定性的影响,通过最大后验概率确定浸润线埋深预警阈值。通过对陕西某尾矿坝的实例研究,得出堆积坝标高1 220. 03、1 200. 03、1 180. 03、1 150. 03 m处的浸润线高于37. 33、19. 9、17. 6、11. 6 m时,尾矿坝存在潜在不稳定风险,应采取措施降低浸润线高度。结果表明,浸润线预警阈值能客观反映尾矿坝稳定性状况,完善了尾矿库的现场监测预警体系。     

尾矿库溃坝监测预警系统设计研究

通过分析国内外尾矿库事故原因,确定了浸润线、防洪能力、坝体位移和降雨量作为尾矿库安全运行的主要监测指标。并结合现代监测技术设计开发了尾矿库溃坝监测预警系统。介绍了本系统硬件和软件结构及功能。     

尾矿坝浸润线预警研究

运用Geo-Studio软件,对某尾矿库不同水位工况下尾矿坝的浸润线及安全稳定性系数进行计算。根据计算出的结果,并结合《尾矿库安全技术规程》中的相关规定,对尾矿坝浸润线进行预警,得到该尾矿坝浸润线的三级预警值,为尾矿坝浸润线的预警提供理论依据,具有重要的借鉴意义。     

尾矿库坝体稳定性在线监测系统研究

尾矿库作为一种高势能人造泥石流危险源,其稳定性的监测对防止溃坝灾害的发生起到至关重要的作用.以坝体深部位移、坝体表面位移、浸润线、渗流压力、库水位、降雨量、干滩长度和安全高差为监测内容,研究了基于GSM/GPRS通信网络平台的尾矿库安全监测数据的无线远程传输技术,以全新的监测技术和手段,实现了尾矿坝稳定性的全天候、自动、远程监控,建成了集监测数据定时采集、实时传输于一体的高精度尾矿坝稳定性在线监测系统.监测系统的建成为获得尾矿库坝体运营过程中的动态演化信息提供了有效的技术手段.     

某大型尾矿库安全监测系统研究

首钢矿业公司水厂铁矿两个尾矿库库区面积大、需监测的点位多,人工监测存在工作量大、精度和实时性差的缺点。通过在线监测系统的设计,实现尾矿库坝体浸润线、位移和库区降雨量、尾矿库水位等安全运行技术参数的实时在线监测;对尾矿库网络拓扑结构和硬件系统防雷进行设计,实现基站数据和在线监测数据与机房的通讯,最大程度地降低雷击对系统的损坏;建立尾矿库安全监测信息管理系统,实现数据的共享,为各级管理员提供简便、有效的信息参考。该监测系统应用后,可实现尾矿库运行安全技术参数数据的实时在线统计上传,自动化、信息化水平较高,方便管理人员准确掌握尾矿库运行的安全状况和稳定程度,实现管理过程透明化,提高了尾矿库的安全管理水平。该大型尾矿库安全监测系统的设计经验,可为其他尾矿库提供参考。     

超大型尾矿库安全技术监测与管理系统

尾矿库运行的安全技术参数能够准确反映尾矿库的安全状况和稳定程度,通过自动化、信息化等手段快速、准确地掌握尾矿库运行参数十分必要,也是体现尾矿库管理水平提高的一个重要标志。首钢水厂铁矿通过对坝体位移、浸润线、降雨量、库区水位等尾矿库关键参数进行在线监测,建立安全管理平台,实现数据共享,使得各级管理人员都能及时了解当前尾矿库的运行状态,实现管理过程透明化,提高尾矿库的安全管理水平。     

十八河尾矿库在线监测工程实践

以十八河尾矿库在线监测为背景,介绍在线监测系统的组成、测点布置及应用效果等,对浸润线、过程线和库水位与干滩长度相关性进行分析,浸润线误差22 mm,相关性为95%,说明尾矿库在线监测系统的可靠和精确。     

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。