软岩巷道支护浅析

从软岩的工程特性、力学特性出发，对煤矿软岩进行了归类，即膨胀性软岩、高应力软岩、节理化、破碎化软岩和复合性软岩。提出了各种类型软岩的变形破坏机理及其应当采用的支护方法。     

中国煤矿软岩工程地质力学研究进展

简要论述了中国煤矿软岩工程地质力学的研究进展 ,首先指出了国际岩石力学学会关于软岩定义的缺陷 ,提出了新的软岩定义和分类 ,在此基础上 ,论述了软岩的变形力学机制、软化状态方程、软岩工程地质力学设计方法。可以认为 ,中国软岩工程地质力学已经形成了完整的理论框架系统。     

煤矿软岩工程技术现状及展望

总结了２０世纪煤矿软岩工程技术的发展历程，这一时期取得的主要成就是：软岩概念的清晰化，软岩工程分类和分级，软岩的工程特性和力学属性，对膨胀性软岩的研究和软岩巷道支护载荷的确定。指出我国煤矿软岩工程技术方向的问题，展望了２１世纪软岩工程技术的走向，论述了软岩工程技术的信息化、知识产业化的趋势，认为跨世纪煤矿软岩工程工作者任重道远。     

软岩巷道支护技术及在实践中的应用

阐述了软岩的特性和软岩巷道支护技术,表述了软岩多样性,微观上差异性,说明了软岩巷道支护技术,要因地制宜地应用到生产实践当中。     

软岩顶板煤巷支护技术研究

该文介绍了软岩顶板煤巷的支护方案设计,重点论述软岩顶板煤巷的支护施工工艺技术和软岩顶板煤巷支护的效果,为软岩矿井的安全生产提供重要的理论支持。     

软岩巷道围岩的工程特性及其分类

介绍软岩巷围岩工程7条特征,建立软岩巷道工程概念,提出判别软岩和硬岩、软岩巷道和一般巷道的指标,用C值把软岩分成4类。     

软岩的工程特性及矿压特征

本文对软岩的概念及工程特性,尤其是软岩的强度、膨胀性等进行了阐述,并以一些软岩矿区巷道地压的观测资料为基础,阐述了软岩巷道地压显现的一些规律,进而对软岩巷道的维护方法提出了一些认识。     

软岩巷道采用锚网喷与O型拱联合支护分析

正令煤业大巷为深部软岩巷道,围岩松散破碎.在分析了软岩巷道失修的原因,并根据软岩岩层的特殊性,对软岩巷道采用一般支护比较困难的情况下,进行锚网索喷与O型拱联合支护的可行性研究,从而找到适于软岩巷道支护的方式,解决了软岩巷道支护困难的难题.试验表明,该技术支护效果良好,并取得可观的经济效益.     

照金煤矿软岩支护实践

分析了照金煤矿软岩的特性和存在机理,论述了在新建煤矿中遇到软岩时所采取的施工措施,探讨了斜井穿软岩、煤仓穿软岩、巷道掘进过软岩时躲避、治理的一系列方式方法,为相似条件的施工,特别是新建井的施工提供借鉴。     

煤矿软岩巷道支护方式研究

煤矿开采深度的加大,影响着软岩巷道的支护方式。本文主要是基于软岩的特性,研究软岩巷道支护技术中的相关问题,并提出了软岩巷道支护的二种新技术,为解决煤矿软岩开采问题提供参考。     

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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