自组织竞争神经网络在采煤机煤岩界面模式识别中的应用

采煤机煤岩界面识别技术是实现采煤工作面自动化的关键技术之一。利用自组织竞争神经网络对采煤机煤岩界面模式识别进行仿真分析,结果表明,自组织竞争神经网络能对输入向量模式进行正确分类,并能很好地解决采煤机煤岩界面模式识别问题,从而为采煤机煤岩模式识别器的改进提供了技术参考。     

综采工作面智能化关键技术研究现状与发展方向

为实现综采工作面的智能化,解决目前我国矿井普遍存在的开采装备技术落后、资源采出率低等突出问题,通过分析国内外综采工作面智能化开采技术应用现状,构建了综采工作面智能开采系统的主干模型,并就其中涉及到的采煤机位置监测、工作面自动取直及水平控制、煤岩界面识别、溜坡控制等关键技术进行了分析与总结,指出应用惯性导航技术是实现工作面取直的有效方法,应用热红外线技术进行煤层特征追踪技术是解决煤岩界面识别问题的有效途径;最后对综采工作面智能化的发展方向进行了展望。     

薄煤层开采与成套装备技术的发展趋势

为了实现我国薄煤层高效开采,根据煤矿科学开采发展的要求,介绍了薄煤层开采与成套装备技术发展和应用情况;指出滚筒采煤机、自动化刨煤机和连续采煤机以及无人工作面螺旋钻机开采是薄煤层综合机械化开采技术,因此全面发展综采装备、尽快国产化是发展趋势,创新发展是薄煤层开采和装备的发展方向;全面掌握刨煤机开采技术,加快刨煤机装备国产化,实现开采装备智能化;提高薄煤层滚筒采煤机装备的创新速度,实现工作面装备高适应性、高性能和高可靠性以及智能化和无人化;研制薄煤层连续采煤机,完成薄煤层开采装备充分国产化;推广螺旋钻机极薄煤层开采,进一步完善螺旋钻机开采装备。薄煤层开采技术向自动化无人工作面高产高效生产发展,而且薄煤层无煤柱开采是发展趋势。研究和发展高产高效工作面无人化薄煤层开采装备是当前的主要任务,高速高效自动化、智能化、无人化滚筒采煤机开采装备和工作面巷道煤岩掘进装备是重要工作,为煤矿数字化绿色开采、智能开采和可持续发展打下基础。     

综采工作面智能化开采系统关键技术

简要回顾煤矿智能无人开采发展历程,在分析综采工作面智能化开采需求的基础上,提出了综采工作面智能化开采系统架构,包括精准煤层三维地质模型及其动态调整、智能化开采控制、智能化无人巡检装置和智能化协同集控等4个部分,提出了综采工作面智能化开采模式。分析了综采工作面初始三维地质模型、三维激光扫描技术,确定综采工作面三维地质数字化模型动态调整步骤,形成动态调整的综采工作面三维数字化地质模型,实现综采工作面的有限透明。指出综采工作面智能化开采三项关键技术:采煤机智能化割煤技术、液压支架自适应控制技术和综采工作面直线度控制技术。在神东榆家梁煤矿43101综采工作面进行技术应用,动态调整的综采工作面三维数字化地质模型精度为0.2 m,日割煤可达15刀;采煤机和支架自动化率95%以上,人工干预率20%左右;综采队全员工效125.69 t/工,较之前提高95.98%;工作面无直接操作人员,仅有1人巡视。研究成果可为煤矿智能无人开采提供借鉴。     

采煤工作面煤层三维模型构建及动态修正技术

高精度工作面煤层三维模型是实现无人开采的有效保障,但现阶段构建的煤层三维模型普遍存在以静态模型为主且垂向分辨率较低的问题,为满足无人开采对煤层三维模型高精度的要求,煤层三维模型必须要有一个动态精细修正的过程。为此,在详细分析了煤层三维模型不确定性影响因素基础上,提出一种煤层三维模型的动态精细修正技术,进而提升煤层三维模型局部精度,实现工作面的有限透明。主要思路是在工作面的不断推进过程中,动态融入回采作业中最新探测的工作面激光扫描数据、顶/底煤厚数据和采煤机截割轨迹信息,采用二次序列规划法精确计算出煤层三维模型局部区域的修正值,并利用克里格空间曲面插值法把修正值插入到煤层三维模型中,这样利用上一回采阶段新揭露的修正数据去动态修正下一回采阶段的煤层三维模型,如此逐级递进,逐步求精,从而提升煤层三维模型精度,使修正后的煤层三维模型更准确地表达出工作面实际煤层的结构信息,为工作面无人化开采控制提供关键基础数据。在斜沟煤矿试验结果表明工作面推进前100刀修正后煤层垂向误差绝对值小于0.2 m区域比修正前提高了将近一倍,证实了该研究方法可有效提高采煤工作面煤层三维模型局部精度,提升煤层三维模型的实用价值和应用程度。     

回采工作面煤层三维建模技术及其在智能开采中的应用

提出了回采工作面地质模型的3层构建框架,阐述了回采工作面煤层模型的构建过程;采用综合动态解释技术对地质、钻探、物探数据进行数据融合;采用多级多属性三维动态地质模型构建技术建立回采工作面煤层模型,根据采煤机截割参数和煤层三维地质模型生成采煤机截割曲线供采煤机进行割煤作业。在试验工作面进行了应用,对巷道测量、切眼测量、钻孔伽玛、钻孔雷达探测、槽波探测数据进行综合解释,构建了工作面的三维地质模型,依据采煤机截割参数生成截割曲线并通过集控系统下发给采煤机,指导采煤机基于煤层模型进行割煤工作。     

国内外煤岩界面识别技术研究动态综述

煤岩界面识别 (CII)能使采煤机具有自动追踪煤岩界面的能力 ,不仅有助于引导煤矿井下采煤自动化 ,提高生产效益 ;还能减少那些在选煤过程中必须除去的岩石和其它矿物含量。它既可用于人工操作的采煤机 ,也可用于计算机控制的采煤机。可靠的CII系统在经济效益和安全作业两方面都具有突出的优点 ,它提高煤层的采出率 ;降低煤中的矸石、灰分和硫的含量 ;提高采煤作业效率 ;减轻设备磨损 ;减少设备维修量和停机时间 ;由于振动较小 ,降低了空气中的岩尘含量 ,并可使作业人员远离危险工作面     

基于地理信息系统（GIS）的采煤机定位定姿技术研究

采煤机自主定位及其对煤层信息的感知是采煤机自动控制系统关键技术。以山西某煤矿18201工作面为试验地点,利用震波CT探测技术对工作面煤层进行了精细勘探,构建了工作面煤层地理信息系统。以具有自动寻北功能的惯性导航装置、轴编码器为传感元件,开发了基于工作面地理信息系统的采煤机定位定姿装置。经过工作面试验,采煤机定位装置可实时测量采煤机行走轨迹、截割轨迹及其与煤层顶底板关系,实现了采煤机在工作面煤层三维地质环境中的定位与煤层地质信息的感知。     

基于GIS系统的采煤机导航自适应截割技术研究

本文介绍了自动化、智能化煤矿开采技术研究现状,提出利用震波CT煤层地质探测技术进行煤层地质初探,同时采用巷探、钻探等地质实测技术反演煤层及顶底板岩层地质条件,从而构建精细化三维GIS煤层地理信息系统,基于GIS煤层地理信息系统,开发了采煤机自适应截割技术,实现了采煤机自动调高和截割路径自动规划,解决了工作面推进方向的采煤机调高难题,规划了采煤机过断层是截割路径。     

基于煤层地质模型的采煤机绝对定姿定位方法的研究

针对目前采煤机定位定姿数据无法满足综采工作面生产过程中实用性、精确性的要求,根据采煤机与工作面煤层之间的空间位置关系,提出了基于煤层地质模型的采煤机绝对定位定姿方法。首先利用工作面煤层地质数据,生成精确的煤层地质模型;然后深入研究采煤机自主导航参数解算的原理,并在此基础上对惯导系统的参考坐标系进行了调整;通过采煤机位姿数据和煤层地质数据相互融合,实现了采煤机的绝对定位定姿和对煤层地质数据感知,为采煤机滚筒实现自适应截割提供技术支撑;最后在山西某自动化工作面进行了工业性试验。     

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     

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     

2014 second batch of rare earth quota released

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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     

China rare earth market review

正November 21~30,2014Due to weak demand from downstream industries,transactions of rare earth in Chinese domestic market were inactive.It was difficult to sell any rare earth products except for dysprosium oxide and terbium oxide.Suppliers lost confidence in recent market.Demand for rare earth products was soft.Consumers continued to take a wait-and-see attitude.Rare earth export market remained slow.     

Galaxy Magnets achieved the net profit of 34.02 million yuan in the first six months of 2014

正Galaxy Magnet announced its financial results for the first half of 2014 on August 14.For the first six months ended on 30 June 2014,Galaxy Magnet achieved operation income of RMB 182.3 million,up8.40% over the same period of 2013,and the net profit attributable to the shareholders of the listed company of 34.02 million yuan,increasing 35.49% over the same period of last year.Stable performance increase was led by development of new customers and application market of magnets.