高强聚酯纤维柔性网工艺在综采工作面的应用

赵固一矿综采工作面末采收尾工作一直沿用金属菱形网配合钢丝绳铺顶工艺,该工艺在收尾施工效率及施工安全方面存在联网工序复杂、施工劳动强度大的缺点,从而导致工作面收尾期间施工效率低、施工人员安全无保障。为此,赵固一矿在11031-1综采工作面收尾期间,采用矿用高强聚酯纤维柔性网进行工作面收尾铺顶,取代了以往菱形网配合钢丝绳铺顶工艺,具有抗拉强度大、工艺简单、安全性高、劳动强度低等特点,取得了良好的应用效果。     

综放工作面柔性网收尾工艺应用研究

通过在综放工作面使用柔性网收尾工艺,与传统工艺对比分析,对综放工作面收尾工艺进行了优化。使用柔性网的收尾工艺在实践中通过各项指标对比,证明优化后的收尾工艺更加能够满足安全生产要求,大大降低了运输成本和职工劳动强度,提升了安全生产效率和回采率,与此同时,基本避免了人员进入煤墙作业的情况,降低了生产风险。可为其他综放工作面收尾提供参考。     

不规则大坡度综采工作面收尾调斜技术研究

不规则综采工作面收尾调斜是综采工艺中一项复杂的工程,综采工作面收尾工作工序比较复杂,需要提前上顶网,铺设钢丝绳,本文通过合理利用伪斜开采,在工作面收尾前进行调斜,避免了工作面边调斜边收尾,确保了工作面收尾质量。     

柔性网整体铺网护顶技术在综放面末采贯通中的应用

根据矿井的开采条件,借鉴柔性网整体铺网护顶技术在神华神东、宁煤、乌海等矿区300多个工作面末采贯通中应用的成功经验,保德煤矿在综采放顶煤工作面的末采贯通中成功推广了该套工艺。柔性网在工作面停采前开始铺设,采用同步上网工艺整体铺设,简化收尾工序,对提高综采工作面回撤效率和安全保障性具有重大意义。     

特厚煤层放顶煤工作面高效收尾技术实践

以斜沟煤矿23103特厚放顶煤工作面为研究对象,通过停采线的确定、整体提溜、调斜、工作面铺网、回撤通道支护等工序,确定了放顶煤工作面高效收尾合理的技术参数,降低了巷道支护难度,缩短了收尾时间,保证了矿井安全高效生产。     

软煤层综放面收尾工程锚网与锚索支护实践

 论文以山西华晟荣煤矿3103综采放顶煤工作面收尾工程以例，通过锚网与锚索支护技术，有效解决了软煤层综放工作面收尾的支护问题，在安全、技术及经济方面效果显著。其支护方式对类似条件的矿井具有一定借鉴和参考作用。     

综放工作面地质构造段柔性网收尾工艺

针对高河能源公司W1319综放工作面停采线附近遇地质构造段,应用柔性网进行收尾,并对收尾过程中的围岩进行有效管控,进一步优化了综放工作面收尾工艺。与传统金属网收尾工艺相比,柔性网收尾工艺在经济效益及安全效益方面更有优势,更能满足安全生产需求,还大大降低了收尾成本,提高了生产效率和资源回收率。     

柔性网绳在大采高综采工作面收尾中的应用

为了实现大采高工作面安全快速收尾,保证生产衔接的正常接替,东曲矿28204工作面采用了柔性网及钢丝绳对顶帮进行了支护。本文阐述了柔性网绳在收尾过程中使用的具体工艺,分析其支护效果,降低了劳动强度的同时提高了安全系数,变被动支护为主动支护,加快了收尾进度,为大采高工作面收尾提供了宝贵经验。     

急倾斜工作面伪俯斜放顶煤工艺探析

对工作面放顶煤工艺的两种方式(采煤、放顶、放顶煤,采煤、放顶煤、放顶)进行了比较分析,指出工作面回采过程中采用采煤、放顶煤、放顶工艺,能大大减少工作面冒顶及切顶事故的发生。     

综采放顶煤工作面生产效果计算机模拟研究

为了预测综采放顶煤工作面的生产效果 ,优化采煤工艺方式 ,根据目前综采放顶煤的工艺过程 ,研制开发了综采放顶煤工作面生产效果计算机模拟模型 ,并在生产实际中进行了应用 ,获得良好的效果     

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.