改善地下中深孔爆破效果的途径

中深孔爆破采用压气装药后，提高了装药密度，但爆破效果并未得到改善，其原因是炸药性能和装药结构改变后，原起爆系统和爆破参数并未进行相应的改善。本文从优化爆破参数及改变起爆方法等方面探讨了改善中深孔爆破效果的途径。     

空气间隔装药技术在露天煤矿爆破开采中的应用

在概述空气间隔装药爆破机理的基础上,以某露天煤矿为例,通过爆破试验确定出最佳的空气间隔装药爆破参数,并对爆破效果进行综合评价.评价结果表明,装药结构对露天煤矿爆破效果有较大影响,通过采用合理的装药结构,能显著改善爆破效果,并节约爆破成本,保证煤矿生产安全.在综合考虑爆破效果及爆破成本的情况下,将PVC管空气间隔器的长度...     

轴向不耦合装药爆破应用研究

轴向不耦合装药是一种有效的爆破装药技术。以往研究显示,轴向不耦合装药在减少炸药用量同时,能够改善爆破效果。为了取得良好效果,轴向不耦合装药必须采用适合的爆破参数。采用数值模拟及现场试验,研究了轴向不耦合装药的间隔位置及间隔长度对爆破效果的影响,并探讨了合理参数范围。该研究结果可以为工程爆破施工提供参考。     

岩体结构面对边坡爆破的影响及改进措施

分析了结构面垂直水平面的边坡、顺层边坡和反倾斜边坡的光面爆破效果。结构面垂直水平面边坡爆破后,容易形成锯齿形坡面,可以通过多打孔、少装药等措施改善爆破效果。顺层边坡爆破后,容易发生滑坡,可通过爆破前边坡加固、间隔装药爆破降低爆破对边坡保留岩体的破坏作用。反倾斜边坡爆破后容易形成局部超挖,可通过减小边坡坡面角和分段装药爆破的方法改进爆破效果。本研究对改善类似边坡爆破效果有一定的参考价值。     

炮孔底部空气间隔装药结构爆破理论与模型试验

从理论和试验角度对轴向不耦合孔底装药结构改善爆破效果进行研究,并介绍了孔底空气间隔装药结构爆破理论。     

空气间隔装药技术在露天石灰岩矿山爆破中的应用

露天台阶爆破过程中,装药结构是影响爆破效果的一个很重要的因素。合理的装药结构在日常采用的中深孔爆破实践中,对改善和提高爆破块度的均匀性以及节省爆破的成本起着至关重要的作用。从理论上并结合现场实际操作,对常见的几种装药结构进行了研究,综合得出空气间隔装药在现场操作便利性、经济合理性较好。经过实践应用发现采用空气间隔装药爆破效果良好,为其他同类型爆破提供了一些可供参考的经验。     

露天矿深孔底部间隔装药结构的研究

本文分析了露天矿深孔爆破长期沿用的连续装药结构存在的问题，论述了底部间隔装药结构的特点和爆破作用原理，指出采用底部间隔装药结构可使炸药能量分布趋于合理，同时降低爆炸压力，延长爆破作用时间，提高爆破能量利用率，改善爆破效果。通过现场爆破漏斗对比试验、小台阶模拟试验和工业试验与应用，证实了底部间隔装药结构优于连续装药结构，得出了最佳间隔系数＝20％～25％；     

水间隔装药降尘爆破技术在高村铁矿的应用

露天矿山爆破粉尘含大量微细颗粒,严重污染采场环境。通过分析水雾除尘机理,自主设计并建立爆破粉尘测试系统,在高村铁矿进行水袋间隔装药结构与岩粉间隔装药结构的爆破粉尘对比试验,结果表明：采用水袋间隔装药,粉尘吸附效果较好,吸附率达到46.72%～51.20%;同时在改善破碎块度方面也优于岩粉间隔装药。水间隔装药降尘爆破技术在露天采矿以及非矿山领域的工程爆破中具有广阔的应用前景。     

间隔装药在露天矿爆破中的试验与应用

对于露天矿来说,爆破效果的好坏对其采剥生产的顺利进行产生着重大影响.通过气体间隔和水间隔2种间隔装药结构在爆破生产中的试验与应用,对铁矿的生产爆破技术进行了改革,对间隔装药结构的爆破从装药方法、理论、试验和实际应用等方面分别进行了论述.间隔装药的应用,降低了爆破初始脉冲压力峰值,减少了爆破的破碎能量,延长了爆破作用的时间,增加了爆破破裂能量,改变了爆破能量的分配状况,提高了爆破能量的利用率,改善了爆破效果,并且获得了良好的经济效益.因此,间隔装药可以在类似矿山爆破生产中推广应用.     

大孔径浅孔爆破孔底空气间隔装药技术研究

由于孔底空气间隔装药技术对改善岩土爆破效果的优势比较明显,所以加强其理论分析与实验研究有重要意义。分析孔底空气间隔装药技术的破岩机理,得出气药长度比的关系式;通过运用ANSYS/LS-DYNA3D软件模拟大孔径浅孔爆破的过程,对比连续装药与孔底空气间隔装药的实验数据,证明后者在降低爆破振动和爆破应力、保护基底岩石方面具有优势。     

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 materialindustry(continued)

<正>Developing ecological lighting source The world is facing the big problem of energy shortage today and the contradiction between economy development and environmental protection is worsened.Therefore,people are more likely to choose an ecological light source that is more energy efficient and environmental friendly.The choice provides great opportunity for the development of rare earth optical material industry in China.The concept of green lighting positions rare earth luminescent material as a leading player in illumination market.The light source of both rare earth luminescent lamp and LED lamp is ecological and energy saving.This is why     

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.     

Rare Earth Application in Steel in China

<正>China has rich rare earth resources.Output of rare earth and steel in China ranks the top first in the world.However,there is still certain distance between the steel produced in China and developed countries from the point of varieties and quality.China still has to import some types of steel.Improving the quality should be emphasiZed in future development of steel industry in China.Rare earth can be used to upgrade traditional steel     

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.     

稀散金属产业的观察与思考

分析了近年来国内外稀散金属产业的生产、应用、资源与市场状况.铟锡氧化物靶材、砷化镓晶片、锗红外材料、铼高温合金和硒在电解锰及玻璃的应用等已成为稀散金属的主要应用领域.稀散金属的产量快速增长达到历史高位而导致了市场的失衡.以GaInP_2/GaAs/Ge,CIGS和CdTe为代表的非硅系太阳能电池是稀散金属的新兴应用领域,将给稀散金属带来日益增长的需求.     

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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