急倾斜近距离复合薄煤层合层开采实践

通过对李子垭煤矿急倾斜近距离复合薄煤层5102工作面开采条件及难度进行全面分析,结合国内急倾斜薄煤层和近距离复合煤层综合机械化开采实践经验,制定了针对5102工作面合层高效开采的技术方案,总结了急倾斜近距离复合薄煤层开采的实践经验,减少了煤炭资源浪费,为类似条件煤层开采积累了宝贵技术经验。     

AHⅢ型机组在急倾斜薄煤层开采中的应用

介绍了AHⅢ型机组的技术特征和适应条件、急倾斜薄煤层综合机械化开采工艺、安全技术保障等关键技术,为在急倾斜薄煤层中实现走向长壁综合机械化开采提供借鉴。     

薄煤层开采现状及发展趋势

我国煤层赋存条件比较复杂,煤炭资源分布地域辽阔,地质条件复杂多样.经过多年开采,不少矿井中厚煤层已近枯竭,薄煤层的开采正规模化地进行,发展薄煤层机械化开采对于开发利用煤炭资源,延长矿井开采年限和实现高效开采都具有十分重要的意义.论文从薄煤层开采中存在的问题出发,分析了目前薄煤层开采主要机械化设备的技术特点,指出了薄煤层开采的发展趋势.     

急倾斜近距离薄煤层的开采

柔性掩护支架采煤法在木城涧煤矿急倾斜近距离薄煤层联合开采中的应用，从技术上解决了急倾斜近距离薄煤层开采难的问题。介绍了其采煤工艺，阐述了这一采煤法在急倾斜近距离薄煤层开采应用中所取得的成果、存在的不足及下一步的技术方向，此工艺可在适合采用这种小型柔掩支架的煤层中推广应用。     

螺旋钻采煤机螺旋钻杆的模糊优化设计

随着矿井开采年限的增加和开采强度的加大,厚煤层和中厚煤层所剩无儿。为延长矿井的服务年限,我们不得不在薄煤层甚至极薄煤层开采上寻找出路。但是长期以来,我国薄煤层开采却不景气。近年来,随着螺旋钻采煤机的成功研制,薄煤层开采逐渐迎来了新的契机。     

薄煤层炮采机械半机械化开采技术及工艺探索

根据我国煤炭资源情况,发展薄煤层炮采机械半机械化开采技术,对于开采利用我国的煤炭资源,延长矿井的开采年限,实现矿井高效开采,具有重要意义。随着采矿设备制造水平提高,炮采机械半机械化开采技术逐步发展成熟,薄煤层矿井根据不同地质条件选择适合的炮采机械半机械化开采技术,可有效提高薄煤层工作面采煤效率及机械化、自动化水平。     

近距离薄煤层开采的探索与实践

该文通过对公司三层煤（薄煤层开采）试采情况的总结，为今后三层煤及其它薄煤层开采积累了经验，对公司濒临资源枯竭的矿井最大限度地延长矿井服务年限，具有重要大意义。     

急倾斜薄煤层采煤工艺研究和应用

采用理论分析、数值模拟以及现场实测相结合的研究方法,对福兴煤矿急倾斜薄煤层的采煤工艺、回采巷道支护参数和柔性掩护支架设计等进行了系统地研究,解决了急倾斜薄煤层开采的技术难题,实现了矿井的安全生产。     

薄煤层开采技术的研究与分析

介绍了薄煤层的开采技术及发展,论述了发展薄煤层开采技术对合理利用有限的煤炭资源、延长矿井开采年限和实现我国能源工业可持续发展的重要意义。并以东曲矿2507工作面为例,介绍了开采过程中的布置及支护工艺,为似条件薄煤层的开采奠定了基础。     

浅谈薄煤层开采现状其发展趋势

不少矿井中厚煤层已近枯竭,薄煤层开采正规模化地进行,发展薄煤层机械化开采对于开发利用煤炭资源,延长矿井开采年限和实现高效开采都具有十分重要的意义。该文从军城煤矿薄煤层开采中存在的问题出发,分析了目前薄煤层开采主要机械化设备的技术特点,指出了薄煤层开采的发展趋势。     

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     

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.     

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     

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     

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.