煤矿井下非电力组合泵站局部注浆防灭火技术研究

为防治煤矿井下煤炭自燃,在分析气动隔膜泵与水射流泵工作特性的基础上,提出了非电力组合泵站局部注浆防灭火技术,根据现场使用要求确定了局部注浆用泵的选型与组合方式,计算了组合泵站最大输浆距离,给出了组合泵站注浆系统配置与工艺流程,并建立了组合泵间最短连接管路长度的计算模型。研究结果表明:由气动隔膜泵与水射流泵构建的非电力组合泵站,仍可保持简单、轻便、安全的特点,可同时解决煤矿井下非电力局部注浆的自动制浆、连续注浆以及长距离输浆并保持出口压力等问题,在管径50 mm配置下最大输浆距离可达189 m,约为气动隔膜泵输浆距离的1.6倍,适合井下非电力长距离局部注浆防治煤炭自燃的区域。     

工作面动水注浆封堵奥灰水技术探讨

王河煤矿109070工作面在回采时底板奥灰突水,突水量大,水压大,堵水技术难度高.在井下采用引流降压、应用新型材料、双液间歇注浆等综合注浆技术,最终注浆封堵成功,确保了矿井安全生产.     

柴沟煤矿防灭火注浆系统的设计及应用

介绍了柴沟煤矿建立防灭火注浆系统的必要性,通过对地面固定式注浆系统和井下移动式注浆系统的特点比较,提出并建立了一种井下固定式注浆系统。该系统的建立,有效减少了柴沟煤矿采空区的漏风,抑制了采空区浮煤的自然发火,确保了工作面安全生产。     

煤矿注浆灭火计算机远程监测系统的研制

介绍了针对在煤矿灭火注浆过程中注浆管道泄漏故障而研制的1套计算机远程实时监测系统。该系统以地面注浆站向井下注浆的总流量和注浆密度与井下各注浆点监测的流量、密度作比较的方法,判断注浆管路系统是否泄露。文章主要论述了系统的硬件结构与软件实现方法,系统具有集中打印各注浆点流量、密度、时间段总流量和数据记录查询等功能。     

YWQ24/38型液压弯轨器

YWQ24/38型液压弯轨器是借鉴铁路系统采用的同类设备,结合煤矿井下巷道工况和运输轨道修理的特殊要求而设计的新型弯轨器,本文介绍了它的工作原理和结构特点。     

QB系列气动高压双液注浆泵的研究

采用化学注浆的方法对采煤工作面煤壁或巷道松软破碎围岩进行加固、对透水岩层进行注浆堵水等是提高矿井生产效益和安全性的一种行之有效的方法。但注浆设备的研制相对滞后,注浆设备不配套,注浆施工工艺落后,已成为制约化学注浆推广应用的瓶颈。QB-25(12)系列高压双液注浆泵,体积小,重量轻,最大注浆压力可达30MPa,经井下现场工业性试验证明,QB-25(12)系列高压双液注浆泵性能可靠,使用方便安全,排量准确可调,能适用于井下狭小空间,并已成功地应用于煤矿井下工作面或巷道破碎煤岩注浆加固、透水岩层注浆堵水工程中,从而完善了注浆工艺并提高了注浆效率和注浆效果,为矿井高效安全生产提供了可靠的技术手段。     

煤岩注浆加固技术与高性能无机注浆材料研发

基于煤矿井下不同现场注浆加固工程对注浆材料性能的需要,研发了新型无机双液及单液注浆材料。前者具有突出的快凝、早强特性,2种组分混合后5～15 min固化,1～8 h强度可达8～15 MPa。该材料主要应用于叠加应力、构造区、动压等复杂条件下具有较强时效性要求的大变形巷道浅孔注浆加固工程;后者具有突出的高渗透、高强特性,其细度达2 000目(6.5μm),在(0.6～0.8)∶1水灰比下,最终强度可达50～70 MPa。该材料主要应用于采煤工作面防片帮深孔注浆加固工程。     

煤矿井下全液压履带钻机泵站的设计

以一款煤矿井下全液压履带钻机为研究对象,根据钻机的主要技术参数对电机、液压泵这类提供动力的元件进行计算选型。针对坑道钻机结构紧凑的特点,结合整机的结构对泵站进行合理布局,根据液压泵的参数对油箱的容积、油箱中的液压元件和冷却器进行了计算,最终设计出能够为该钻机安全、可靠提供足够动力的泵站。为煤矿井下全液压履带钻机泵站的设计提供了理论基础。     

一种国产高端大流量乳化液泵站原理及应用

为加快乳化液泵站成套装备国产化开发,打破国外高端采煤设备对国内的垄断,浙江中煤机械科技有限公司开发了国产高端BRW630/37. 5+BRW800/16型大流量乳化液泵站。介绍了泵站结构组成及特点,分析了泵站设计的优缺点。该成套泵站系统已成功应用于神东煤炭集团大柳塔煤矿22311-1等工作面。井下工业性实践证明,该国产成套大流量乳化液泵站能够满足综采工作面液压支架的用液需求,具有故障率低、噪声低、设备维护保养简单方便、运行稳定可靠等优点。它的成功设计和应用,对其它型号国产泵站以及其它采煤装备的开发具有借鉴意义。     

科技动态

·科研成果·乳化液泵站控制保护系统及元件由煤炭科学研究院太原研究所和无锡、平顶山煤矿机械厂共同设计的350公斤力/厘米~2级乳化液泵站控制保护系统及主要元件,通过了全面的型式试验和井下工业性试验,煤炭部科技局于1981年7月9～11日在徐州旗山煤矿召开了技术鉴定会,对MXF型自动卸载阀、MJF型减压阀等5个主要控制保护元件作了初步定型鉴定,并审定了泵站系统设计和液箱设     

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     

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