钻机凿岩偏斜的控制技术

安庆铜矿高阶段大直径深孔采矿法使用Ｓｉｍｂａ２６１型钻机钻凿深孔，实践中聘钻孔偏斜率高的问题。为 此，对导致该钻机钻孔偏斜的各种因素进行了分析，并提出了控制钻孔偏斜的有效措施。     

铜绿山VCR法采场Simba261钻机凿岩质量研究

针对铜绿山VCR法采场出现垮塌的情况,分别从钻机性能、偏斜率和凿岩工效方面探讨了凿岩质量不高的原因,并在此基础上,有针对性的提出了提高凿岩质量的改进方案,这为解决矿山VCR法采场凿岩偏斜率大以及效率低下,从而影响采场稳定性的问题提供了理论基础和技术保障。     

反井钻进导孔偏斜控制技术研究

在反井式钻机进行钻井工作的过程中,钻孔中所产生的倾斜及其变向都是很难回避的。而当钻孔倾斜达到一定的程度,就可能会大大降低成本,影响到钻机的正常工作,影响到钻孔质量,甚至会造成钻孔报废,因此,将钻孔偏斜控制在某一范围内是十分必要的。要对钻孔偏斜进行控制,就必须先分析钻孔偏斜的机理,找出钻孔偏斜的原因,才能采取一定的措施来控制钻孔偏斜。     

潜孔钻机凿岩中钻孔偏斜控制技术

基于潜孔钻机深孔施工中钻孔的力学特征受力分析和钻孔偏斜机理研究,提出了根据不同地层特征选择合理钻进参数、适当调控轴压力及转速等有效措施,有效控制钻孔偏斜,保证潜孔钻机钻孔施工质量。     

中深孔凿岩偏斜率控制措施探讨

地下采矿采用中深孔凿岩设备穿孔时,经常会出现中深孔偏斜率较高的情况,较高的钻孔偏斜率会导致爆破效果差、凿岩设备损坏、钎杆断钎等严重问题,从而增加采矿成本。本文以某矿山实际生产为例,统计了若干采场中已施工钻孔的偏斜数据并计算了偏斜率,在此基础上分析导致钻孔偏斜率较大的主要因素,然后提出相应的改进措施,实施后使钻孔的平均偏斜率由5.22%下降到2.05%,获得较好的效果。     

天溜井工程孔施工工艺改进及技术经济分析评价

平铜集团有限公司在天溜井工程孔施工中,由于YQ-100钻机钻孔偏斜率大,常造成工程孔报废.通过改进钻孔施工工艺,即采用KZ-300地质钻机先行钻凿小孔,再用YQ-100钻机及自制的扩孔钻头扩至工程孔,并对此扩孔法与拟新购牙轮钻机一次成孔法进行技术经济比较,做出钻孔机械取舍决策.     

反井钻机在青山煤矿竖井施工中的应用

通过对青山煤矿五水平开拓情况的具体分析,确定了反井钻机型号,介绍了反井钻机的特点和施工工艺,提出了控制钻孔偏斜的因素,在陀螺测井仪的配合下成功施工了4条竖井,成井速度快,成井质量好,平均每条竖井工期27.5 d,平均偏斜率仅为0.3%。     

凡口铅锌矿采场的潜孔凿岩技术

介绍了凡口铅锌矿ＶＣＲ采场应用三种型号潜孔钻机和牙轮钻机深孔凿岩的经验，对如何控制钻孔偏斜，提高凿岩效率作了详细论述。     

凡口铅锌矿采场的潜孔凿岩技术

介绍了凡口铅锌矿ＶＣＲ采场应用三种型号潜孔钻机和牙轮钻机深孔凿岩的经验，对如何控制钻孔偏斜、提高凿岩效率作了详细论述。     

1980年科研成果简介

1980年长沙矿山研究院有18个科研项目通过了技术鉴定。这些项目在技术上达到了先进水平,为我国矿山开采技术的发展,提供了新的设备和手段。 ·AT150型天井钻机 本机是继1978年TYZ500型天井牙轮钻机鉴定后,用钻进法掘天井的又一大型设备,系由主机、AT—M6.3液压马达和φ1.5米天井扩孔刀头组成(共三项成果),可以在地下矿山各种岩层中钻进直径1.2～2.0米、深12O米的天井。钻孔时,其推力为65吨,扭矩为1.344吨米;扩孔时,其拉力为115吨,扭矩为6.887吨米;钻井的偏斜<1％。     

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