城区基坑深孔控制爆破开挖

某城区基坑采用深孔预裂爆破进行边坡轮廓线爆破、V型掏槽开设临空面、台阶爆破法进行基坑开挖的施工实践,对深孔松动微差控制爆破技术的爆破参数、起爆间隔时间、装药结构、非电微差起爆网络和安全防护措施等进行了设计和计算。     

高精度导爆管雷管及逐孔起爆技术在黑岱沟煤矿的应用

介绍了神华准能黑岱沟露天煤矿岩石松动爆破中应用澳瑞凯高精度导爆管雷管及逐孔起爆技术情况。比较了应用前后的爆破效果,电铲挖掘效率,及经济效益、直接爆破成本变动等,证实了逐孔起爆技术在提高爆破安全性、降震及降低采矿综合成本方面的优势。     

路堑开挖中的深孔松动控制爆破技术

通过优化深孔松动爆破参数,采用双回路闭合孔内外延期非电微差起爆网路,严格控制同段起爆药量,采取有效的安全措施,成功地进行山体路堑爆破开挖。     

白象山铁矿主井井塔基坑的爆破开挖技术

白象山铁矿在围绕主井井筒进行井塔基坑爆破开挖时,采用了在井筒四周钻凿减震孔,选取合理位置掏槽增设自由面,分层间隔装药,孔内孔间同时微差起爆,合理安排施工顺序以控制最小抵抗线方向等一系列中深孔松动控制爆破技术和加强覆盖等防护措施,达到了控制飞石、降低爆破振动的目的,提高了施工效率,实现了安全爆破。     

风化岩潜孔钻孔剥离爆破的探索与实践

利用潜孔钻中深孔控制爆破技术对矿山地表风化岩石进行剥离爆破。根据工程特点改装潜孔钻机、优化爆破参数、控制爆破方向,采用非电微差起爆技术,严格控制最上层炮孔的起爆药量,并采取有效的安全技术措施,保证剥离爆破的安全高效,效果较好。     

宝鼎矿区煤层燃烧治理中的爆破灭火技术

本文通过对煤层燃烧区进行松动爆破和预裂爆破注水灭火的工程实例，介绍了在高温区进行深孔爆破的特种技术和方法，同时对研制的耐高温乳化炸药，耐高温被筒以及在高温火区如何保护起爆网络的技术方法作了简要叙述。     

露天矿中深孔微差控制爆破技术的试验与生产应用

结合自己多年来广州市珠江水泥厂石灰石露天矿中深孔微差控制爆破技术的试验与生产应用，通过计算机模拟爆破试验，进行起爆网络设计，爆破过程控制，爆破方向控制，岩石移动方向，块度大小控制，爆破振动，根底，硬墙的状况，爆堆的松散性、形状，后冲，实现“逐孔起爆”技术，改善爆破效果。并对过去的生产爆破参数和爆破方案加以修正，掌握了露天矿山爆破关键技术，优化露天矿山爆破参数，实现最小的投入，赢取最大的收益，降低矿山综合成本，充分合理的利用国家矿山资源。     

松动隔振爆破在立井井壁梁窝施工中的应用

井壁梁窝的施工,是矿井建设中必不可少的工序。文章建立在松动隔振爆破理论的基础上,对潞宁祥升煤业改扩建中的副立井井壁梁窝爆破施工方法进行了研究,通过对井壁结构和梁窝尺寸进行精确分析,针对性采用在梁窝轮廓周边密布空孔,选用合理的雷管起爆顺序的松动隔振爆破方法施工。实践结果表明:采用空孔松动隔振爆破技术,在梁窝施工中取得了良好的效果,具有很好的应用前景。     

逐孔起爆微差爆破技术在太钢铁矿的应用

逐孔起爆微差爆破技术是近几年发展起来的一种爆破技术,并被广泛应用,极大地推动了露天矿山爆破技术的发展。论述了逐孔起爆技术的基本原理和特点,介绍了逐孔起爆技术在中铁十九局太钢袁家村铁矿生产爆破中的实际应用。     

不耦合装药结构下底板岩石松动爆破技术研究

通过刘庄煤矿煤层综采面底板岩石松动爆破现场试验,确定E121105工作面的炮眼均采用水轴向不耦合分段装药结构,反向起爆技术,同时对爆破技术参数(炮眼深度、炮孔装药量、抵抗线、炮眼密集系数和炮孔堵塞等)进行了优化设计,取得了良好的爆破效果。     

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

正~~     

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.