高应力泵房硐室支护技术研究

针对某矿+950 m水平泵房硐室变形破坏问题,为控制围岩变形量和保证生产安全,对硐室原有锚网—碹体联合支护破坏进行了分析,得出围岩失稳的主要原因,并根据泵房硐室的破坏情况,提出了二次锚网索协同稳定性支护技术,有效控制了+950 m泵房硐室围岩变形,确保了矿井安全生产。     

下石节矿高应力泵房硐室围岩控制技术

针对下石节煤矿+950 m水平泵房硐室支护难题,为控制围岩变形量、保证使用要求和生产安全,通过对硐室原有锚网-碹体联合支护的失稳机理、采动影响、围岩物理化学性质及底板破坏特征进行分析,得出了围岩失稳的主要原因,并根据结构补偿和新奥法原理,提出了适用于软岩硐室支护的二次锚网索协同稳定性支护技术,有效的控制了下石节煤矿+950 m泵房硐室围岩变形。     

兴安矿深部泵房吸水井硐室群支护研究与应用

随着矿井开采深度的增加,深部软岩硐室群稳定性控制已成为困扰国内外工程界的难题.为了更好地控制大断面硐室群破坏问题,结合鹤岗矿务局兴安矿四水平泵房吸水井大断面硐室群工程实例,通过现场调查和理论分析,提出了兴安矿四水平泵房吸水井大断面硐室群锚网喷+锚索+底角锚杆耦合支护技术,并在工程中得到了验证.     

深部高应力硐室支护技术应用与实践

恒源煤矿-720 m水平变电所泵房由于该处巷道布置密度大,围岩应力比较复杂,各巷道施工时会相互扰动,造成硐室发生持续变形与破坏。为了控制深部高应力大断面硐室破坏,结合加固支护实例,提出了锚梁网喷一次支护,锚索、注浆二次支护的联合支护技术,有效地控制了硐室的变形,围岩稳定效果良好。     

高应力大断面硐室支护技术研究

针对山东淄博能源集团某矿深部开采水平泵房变形破坏特征,为控制围岩变形量和保证生产安全,通过对硐室原有锚网-碹体联合支护破坏进行分析,得出了围岩失稳的主要原因,并根据泵房硐室的破坏情况,提出了二次锚网索协同稳定性支护技术,有效地控制了该矿深部硐室围岩变形。     

深部泵房吸水井硐室群围岩稳定性一体化控制技术

泵房吸水井硐室群是矿井巷道立体交叉最密集、应力最集中、最容易破坏的部位,其围岩稳定性控制效果直接影响着矿井安全生产。为解决孔庄煤矿-1015m水平深部泵房吸水井硐室群围岩稳定性控制问题,从工程地质条件分析出发,针对"三高一扰动"强烈、膨胀性软岩矿物含量高(伊/蒙混层的总量最大值达89%)、工程施工极其复杂等不利条件,通过集约化设计消除立体交叉巷道硐室群的空间效应,利用数值模拟手段确定最优施工过程,采用桁架+锚网索耦合支护技术实现围岩荷载均匀化。结果表明:深部泵房硐室群稳定性一体化控制技术能够有效地控制围岩变形和破坏,保证巷道长期稳定,具有广阔的推广应用前景。     

深部泵房硐室群破坏原因及控制对策研究

随着开采深度的不断增加,深部泵房硐室群的支护问题变得越来越严重,采用传统的硐室群布置方式和支护方法已经难以保证在服务年限内安全使用,深入研究深部泵房硐室群稳定性控制对策势在必行。通过现场工程地质条件调查和理论分析,研究了夹河煤矿深部泵房硐室群破坏特征,总结了破坏原因,提出了该矿深部泵房硐室群集约化设计方案及配套支护技术,现场应用效果良好。     

深部硐室围岩破坏原因与稳定性控制技术

煤矿开采逐渐转向深部,深部硐室围岩大变形特征给硐室群稳定性控制带来很大难度。根据深部大断面硐室围岩力学特征及变形特性,通过地质条件分析、原岩应力测试、岩石微观组分分析,对深部硐室围岩破坏的影响因素进行了总结,以抗让结合的原则,提出深部构造复杂区域大断面硐室围岩稳定性控制对策。采用关键部位耦合支护控制技术+底脚锚杆+全断面锚索加强支护对深部大断面硐室进行强抗微让的强力支护方式,在葛亭煤矿230扩容泵房硐室成功应用,并对泵房硐室围岩收敛变形、锚杆索工况、离层进行了长期监测,围岩顶底板移近量仅12.5 mm,两帮内移量7.5 mm,锚杆索受力均匀,内外离层较小,完全满足矿井安全生产需要。     

高地压硐室综合支护技术研究与应用

以华丰煤矿-750泵房巷道为例,对高地压硐室综合支护技术进行了研究。分析了巷道变形破坏的主要原因,并据此提出了采用高强智能让压锚杆锚网喷+锚棚+锚注的综合支护技术,通过监控量测对支护效果进行了分析。实践结果表明,该方法对深部硐室进行了有效支护,控制了围岩变形,保证了-750泵房的稳定和服务年限,具有较好的推广应用前景。     

大断面软岩硐室锚网支护技术研究

以桃园煤矿二水平泵房地质条件为基础,通过对大断面硐室现场调查分析,总结泵房变形破坏特征,采用理论分析研究方法,分析大断面软岩硐室巷道变形破坏原因,提出高强度稳定型锚网支护技术方案。现场工业试验和试验效果表明该项支护技术能够有效控制大断面软岩硐室围岩变形,对此类条件下的硐室具有推广意义。     

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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