大直径集束潜孔锤正循环快速扩孔钻进技术试验

空气潜孔锤钻进是基岩尤其是坚硬岩石地区施工首选的一种高效钻进技术。但目前国内直径大于660 mm的空气潜孔锤一次性扩孔钻进的不多,特别是660 mm的集束潜孔锤正循环一次性扩孔排渣钻进更是屈指可数。在金能2号瓦斯抽放立井的钻进试验证明,660 mm集束潜孔锤扩孔能够实现正循环一次性扩孔排渣钻进,并具有扩孔速度快、钻进效率高、施工周期短、适应性强等优点。在较坚硬的岩石地层平均钻进速度6.36 m/h,最高钻进速度9 m/h,比正循环牙轮钻头钻进速度高10倍。对矿井发生灾害事故时,可在最短时间内进行被困人员施救提供了行之有效的方法,同时,也可解决缺水地区或严重漏失地层钻进技术难题。     

基岩水井采用泡沫潜孔锤钻进实践

通过对甘肃肃北七角井铁矿区饱310 mm口径基岩水井空气泡沫潜孔锤钻进施工,总结验证了空气泡沫潜孔锤钻进施工大口径基岩水井的工艺,提出了不同孔段的钻进技术措施。     

大直径潜孔锤跟管钻进直排井施工技术研究与应用

王台铺矿矿井关闭后的涌水对临近矿井安全生产造成了严重的影响,实施大直径直排井进行排水是降低上述影响的重要手段。根据煤层地质及涌水量,直排井井眼直径设计为?650 mm,垂深205 m。由于目的层为巷道且穿过3号煤层采空区,常规钻进方法对目的层安全产生一定的影响,且其钻速慢、成本高。为此,提出了一种大直径潜孔锤跟管钻进新技术,利用潜孔锤进行碎岩,利用跟套管降低环空上返面积进而降低风量要求,有效解决了大直径井眼空气钻进风量需求大、成本高的技术问题。该技术在王台铺矿3口大直径直排井施工中的应用表明,该跟管钻进技术耗气量低、排渣效果好、密封性能优良,平均建井周期20天,平均时效10 m,大幅提高了大直径井眼的钻进效率,降低了钻探成本。     

空气(泡沫)潜孔锤钻进工艺在王家岭煤矿紧急避险孔中的应用

空气(泡沫)潜孔锤钻进工艺在王家岭煤矿紧急避险孔钻进中,有效解决了钻孔垂直度要求高、地层漏失等施工难点,实现了高质量快速成孔。该工艺平均机械钻速高达7.99 m/h,终孔水平位移仅为0.48 m,二开孔段每米综合成本504.8元。邻孔SW1水文补勘孔以泥浆作为循环介质、采用牙轮回转正循环钻进工艺,平均机械钻速为0.86 m/h,二开孔段每米综合成本为820.5元。前者平均机械钻速约是后者的9倍,较后者节约成本38.5%。与邻孔泥浆正循环牙轮回转钻进工艺相比,该工艺不仅解决了紧急避险孔施工难点,还提高了孔身质量、节约了工期、降低了成本,达到降本增效的目的,值得类似工程借鉴。     

大直径集束式潜孔锤反循环钻进方法先导性试验

依托某煤矿区大直径钻井工程项目展开了大直径集束式潜孔锤反循环钻进方法的先导性试验。在试验过程中,采用Φ710/311 mm扩孔用集束式反循环潜孔锤和Φ127/70 mm双壁钻具,通过优化风量、风压、转速等反循环钻进工艺参数,取得了良好的反循环效果,最高机械钻速达到了4 m/h,平均机械钻速2.1 m/h,与同条件下常规牙轮钻头扩孔钻进方法相比提高了2.6倍以上。试验结果表明：大直径集束式潜孔锤反循环钻进方法是解决大直径钻孔硬岩钻进难题的一种行之有效、值得深入研究与推广应用的高效钻进方法。     

大直径矿山充填孔潜孔锤深孔施工技术

本项目施工采用大直径矿山充填孔潜孔锤施工技术,先施工导向孔、后分级扩孔的方式进行施工,钻孔终孔直径1000mm,终孔孔深350m,这个成绩创造了大直径基岩空气潜孔锤钻进最大深度的全国施工记录。本钻孔的成功施工,为后期大直径基岩深孔钻探积累了丰富的施工经验,总结了存在的问题和不足、需要改进的方向,为以后施工同类矿山救生孔、通（抽）风孔、充填孔等大直径基岩深孔工程提供了可靠的技术支持。     

潜孔锤钻进工艺在煤层勘探中的应用

为探明新矿区煤炭资源的储量,选用车载一体化钻机配合空气潜孔锤工艺,进行钻探勘察。实践表明,空气潜孔锤钻进工艺很适合浅层煤炭勘探,钻速最高在49m/h。随着孔深的增加,逐渐遇到破碎带、地层水,空压机也不能同时满足钻进与排渣的需求,钻孔轨迹也开始出现偏斜。空气潜孔锤钻进工艺已经不能满足进一步钻探的需要。针对以上问题,将钻进工艺调整为泡沫潜孔锤钻进工艺,进行了泡沫剂选型实验。为了控制钻孔轨迹,钻进时平均每50m测一次井。调整工艺后,克服了复杂地层,保证了钻孔轨迹在设计允许范围之内,并顺利钻进至681m。     

气动潜孔锤钻进技术在云南旱区找水工程中的应用

介绍了采用空气潜孔锤及纵向割缝型UPVC井管技术施工云南楚雄"科技抗旱井"工程,重点阐述了气动潜孔锤钻进技术在坚硬破碎基岩地区水文水井工程中的技术难点、钻进工艺及成井工艺。针对钻进过程中出现的问题,提出钻具改进措施,取得了显著的实钻效果。该工程采用潜孔锤钻进技术提高了钻进效率,减少了工程造价,水井的出水量、水质等各项指标均达到设计要求,获得了良好的经济及社会效益。     

气动潜孔锤在大口径基岩深井施工中的应用

通过新疆某矿业公司施工生产用水井的实例,介绍气动潜孔锤正循环钻进工艺在大口径基岩深孔施工中的应用尝试.施工实践证明在同样地层、同样口径、同样施工条件下气动潜孔锤钻进工艺钻效明显高于传统泥浆钻进工艺.同时分析了该工艺的优点与不足,提出以后改进完善的方向.     

大直径集束式潜孔锤反循环钻进技术研究

针对大直径集束式潜孔锤反循环钻进试验发现的问题,选型配套了大规格双壁钻杆,改进设计了大直径集束式反循环潜孔锤和孔口密封装置等关键装置。依托某大直径工程项目进行了现场试验,结果显示:大直径集束式潜孔锤反循环钻进平均机械钻速3.41 m/h,与同条件下大直径牙轮钻头正循环钻进相比,效率提高了3.2倍;与原大直径集束式潜孔锤反循环钻进相比,效率提高了60%。     

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