贵州省煤矿瓦斯抽采技术装备现状与展望

针对松软低透煤层需应对瓦斯治理问题与如何应用瓦斯抽采装备的科学难题,基于贵州省瓦斯抽采技术装备取得的代表性成果,选取典型矿井介绍了定向和大功率钻机及瓦斯抽采成套附属装备现状,总结概括了其适用条件、使用过程中存在的优缺点,并对瓦斯抽采效果进行了评价。从支管抽采瓦斯浓度、钻孔的孔深、支管抽采瓦斯浓度衰减速度指标侧面反映ZDY-6000LD（F）定向钻机使用效果优于ZDY-4000LR大功率钻机。通过贵州省瓦斯抽采技术装备存在的问题,提出对定向钻机升级改造、随钻测量设备的开发与煤岩智能判别机制分析、定向钻机联合孔代巷技术进行瓦斯抽采研究以及基于钻孔大数据云技术的理论模型等研究方向进行概述,对贵州省煤矿抽采技术与装备发展进行展望。研究为未来矿井工业实现由劳动密集型向智能化、自动化等特点的技术密集型转变提出新的技术路径。     

矿用智能液压钻机远程监控系统的研究

在煤炭矿井中90%以上的瓦斯突出事故是由于打钻人员未按作业指导要求打钻所致,传统工作方式下,打钻完全依靠人工操作,人工计数,人工核查,存在很大管理漏洞和安全隐患,研究的矿用液压钻机远程监控系统,能够对钻机打钻过程的各种数据进行准确记录和实时上传。解决了瓦斯抽排管理难的问题,提高了煤矿生产安全性。     

松软煤层ZDY5000RF大功率两体式履带钻机研制

针对松软突出煤层钻进装备钻进与事故处理能力不足、体积大集成性差等问题,结合松软突出煤层瓦斯抽采钻孔施工需要,研制了ZDY5000RF型大功率两体式履带钻机。该钻机采用两体式安全布局,履带驱动行走,增加了安全防护系统和防护措施,整机功率达到75 kW,额定转矩达到5 000 N·m,给进起拔力达到210 kN。现场试验选择在淮北祁南煤矿进行,在f值为0.5左右的松软突出煤层中,完成孔深200 m以上钻孔5个。试验结果表明：该钻机具有功率大、体积小、搬迁方便、安全性高、钻进和事故处理能力强等等显著优点,在松软突出煤层中具备200 m深瓦斯抽采的钻孔施工能力,为松软突出煤层矿井瓦斯灾害治理提供了设备保障。     

煤矿井下钻机钻孔与机械伤害事故原因分析及对策

在深入分析煤矿井下钻机瓦斯抽采钻孔施工中可能发生的卡钻顶钻、钻杆扭断、偏斜、串孔、涌水和喷孔等主要常见钻孔事故现象、原因的基础上,给出了指导性处理方法,同时分析钻机施工中7种常见机械伤害事故发生的原因,提出预防措施。该研究对煤矿井下钻机瓦斯抽采钻孔安全施工具有一定指导意义。     

瓦斯燃烧典型事故的原因分析及防范措施

通过对2004年5月30日平煤集团十矿采面发生的燃烧事故调查分析和现场勘查,认为事故是一起钻孔瓦斯燃烧事故,原因是事故区域内煤层瓦斯压力高、含量大;生产中留底煤,底板及邻近层瓦斯涌出,施工钻孔困难,钻机未能实现湿式打眼,摩擦产生高温引燃瓦斯。要防范此类事故,应搞好隐患排查及整改,提高瓦斯抽放效果,打瓦斯释放钻时制定防钻孔冒烟或着火的措施,确保安全施工。     

VLD-1000型定向钻机的孔内事故分析及防范措施

深孔定向钻进技术是区域性瓦斯预抽的关键技术,但在钻进过程中,频繁发生的压钻、掉钻等孔内事故,严重制约了VLD-1000型定向钻机的推广应用.本文结合成庄矿近几年来发生的孔内事故,对VLD-1000型定向钻机的孔内事故原因进行分析,并就预防孔内事故提出一些有效的防范措施.     

大阳矿千米钻机掉钻事故分析及预防措施

千米定向钻机钻进技术是进行工作面瓦斯抽放的重要手段,但在实际的钻进过程中发生的掉钻事故,严重制约着千米钻机的正常工作。本文简要介绍千米定向钻机在大阳矿综采放顶煤工作面施工过程中出现的掉钻事故,以及打捞方案,并就预防掉钻事故总结出了注意事项和预防措施。     

瓦斯事故分析与预防

针对煤矿近年发生的68起瓦斯事故,分析了事故发生的原因和管理中存在的问题,提出了预防瓦斯事故的措施及工作重点和科研方向,从而减少和杜绝瓦斯事故,确保职工生命安全和煤矿安全生产。     

煤矿瓦斯事故原因与防范措施

通过对当前几起煤矿瓦斯事故的分析,指出当前煤矿瓦斯管理工作中存在的问题和不足,提出煤矿瓦斯管理工作中有关建议和意见,从而进一步提高煤矿的安全性,减少煤矿瓦斯事故的发生。     

寺河矿ZDY6000L型钻机定向钻进技术

寺河矿作为煤与瓦斯突出矿井,煤层瓦斯含量大,采掘过程中易发生突出、瓦斯超限事故,严重威胁着煤矿安全生产。定向钻孔瓦斯抽采技术的发展为降低寺河矿煤体瓦斯含量、杜绝瓦斯超限事故提供了一条有效的解决途径。为了避免进口定向钻机的高昂采购成本,在国产非定向钻机基础上进行定向钻进技术与装备的研发,为矿井找到了一条既经济又高效的瓦斯治理途径。     

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。