矿山胶结充填料浆离析程度检测与评价方法研究

以直径为100 mm、高度300 mm的圆柱试模为标准模型,以矿山充填常用砂灰比4、6、8、10为标准配比制作充填体试样,固结后在试样不同部位取样,并检测该部位充填体中水泥含量,通过对比不同部位充填体中砂灰比与设计砂灰比的差异来评价充填料浆离析程度。在上述试验的基础上提出了充填料浆离析程度评价指标离析度ε,并通过大量试验数据将矿山充填料浆离析程度划分为5个级别。充填料浆离析程度定量表征方法及指标的提出,对矿山充填质量评价与管理具有重要意义。     

某矿山全尾砂似膏体充填配比试验研究

某矿山目前采用立式砂仓自然沉降后的粗粒级尾砂进行自流胶结充填,存在充填体泌水量较大,凝固时间长,强度低等问题。针对该矿山现有充填方式存在的问题,结合膏体充填的优势,开展了该矿山尾砂似膏体充填配比试验研究。主要对该矿山全尾砂和分级尾砂进行了物化性质分析,在此基础上开展了全尾砂和分级尾砂似膏体充填配比试验研究,对比分析了2种尾砂充填体的坍落度、泌水率以及单轴抗压强度等指标,结合矿山生产对充填体强度的要求,确定满足生产要求的最佳配比。研究结果表明:充填骨料采用全尾砂较分级尾砂效果好,全尾砂充填体强度能满足矿山生产需要,并根据矿山生产实际,提出了全尾砂似膏体充填配比方案。     

某矿井泵送矸石充填工艺

系统分析了矿井泵送矸石充填工艺流程、充填工作面布置及工作面充填方法。针对某矿泵送矸石充填工作面的具体情况,对充填材料的具体性能要求进行了分析,并设计出适合该矿10903（西）工作面的充填方案。通过对充填工作面的充填体质量及充填接顶率进行观测,分析了充填体质量低于设计要求及充填体欠接顶的原因,供类似矿山借鉴。      

尾砂胶结充填体抗拉强度试验研究

抗拉强度是尾砂胶结充填体的重要强度参数，但由于缺少合适测试方法导致对尾砂胶结充填体抗拉强度的研究不足，不利于胶结充填体的稳定性分析，对矿山安全生产造成隐患。本研究利用将压缩转换成拉伸加载方式，提出一种新的适用于尾砂胶结充填体的直接拉伸试验方法，验证了其可靠性。应用该试验方法测得了多种配比、龄期尾砂胶结充填体的抗拉强度，分析了抗拉强度随灰砂比、质量浓度、龄期的变化规律以及敏感性，可为矿山充填配比设计及抗拉强度测定提供指导。     

充填体的质量与控制

以金川矿山的自流充填为例,阐述了充填体的质量构成,分析了各种因素对充填体质量的影响,提出了实际生产中质量控制的方法.     

全尾砂膏体充填技术及工艺流程的试验研究

南京栖霞山铅锌银矿地处风景区,是典型的"三下"矿山,应用充填采矿已20余年.为不断提高充填质量,先后进行了一系列实验室及工业试验,研究分析了膏体充填技术特性与规律,并在此基础上,设计了新的全尾砂膏体充填工艺流程.新的膏体充填系统具有工艺简便、流程短、可靠性好、稳定性强、运行成本低的特点,适合于在类似地下矿山中推广应用.     

影响地下矿山充填质量的因素

澳大利亚地下采矿工业一直在持续推行充填法采矿技术.近些年来,西澳大利亚矿业学校为西澳大利亚的一些矿业公司完成了一些研究课题,借以确定经济上最合理和土工技术上最合适的充填方法.近年来的研究表明,充填材料的矿物组分和氧化程度以及水泥种类对充填体强度和充填质量都有很大影响.文章将评述在西澳大利亚两座大型地下矿山研究膏体胶结充填和水砂胶结充填工作中,有关现场实践和试验室试验的试验工作和充填质量问题.     

提高矿山充填质量试验研究

介绍了某铁矿山尾砂胶结充填的工艺特点和尾砂特性,进行了胶结充填材料的实验室强度试验和工业试验,并对尾砂胶结充填质量进行了评述。在此基础上,分析了影响胶结充填质量的因素,阐述了提高矿山充填质量的途径和措施,以指导该矿山生产实践。     

矿山充填中的质量控制问题

大量的文献资料证明．地下矿山充填体破坏的原因在于对充填体强度和其它物理参数缺乏充分的了解，以及各个矿山所用的充填材料不能保持始终如一的质量．根据文献资料调查和安大略全省应用充填法的18座矿山的资料，无论是单一矿山的不同水平．还是各个矿山之间，现在都使用非系统的质量控制方法，这些矿山实际上都在使用质量低劣的充填材料，而且在现场又利用不当．本文评估了矿山确定充填体物理参数现用的各种方法，并对优化充填材料试验和制备准则提出了相应的建议．提出了一系列标准的充填料特性试验方法，以便对充填体性态提供实用的而非综合性的评估．这些建议的目的在于提出充填质量评估的工业标准．文中所提供的资料可用于充填设计，也可作为以正规的和比现在更系统的方式对比各矿之间充填质量多数的手段．     

下向矩形进路充填体强度需求应用

通过采用弹性力学简支梁、薄板及加拿大米切尔理论模型等分析方法，结合尾矿胶结充填体的物理力学参数，计算了下向矩形进路充填体顶板的理论强度需求。同时，通过近两年充填站取浆养护充填体的强度试验数据，统计分析了可定量表征实际充填强度工业离散性的浮动安全系数，最终得出了适用于企业现阶段充填质量控制水平的下向进路充填体实际强度需求。通过研究和试验，优化了充填配比设计参数，达到了合理降低胶结充填成本、提高矿山综合经济效益的目的。同时，为类似矿山下向进路充填体强度需求优化提供参考。     

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.     

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     

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.     

Brief news

正Corun invested another 50 million yuan in power battery for HEV Hunan Corun announced on 27 June that they had signed the cooperation agreement to jointly built Corun(Shaoxing)Autos Power Battery System Co.,Ltd.in Shaoxing Binhai New City.According to the announcement,total registered     

China rare earth market review

正November 1~10,2014Chinese rare earth market was still inactive.Demand for rare earth products was weak.Consumers took a wait-and-see attitude for lower price.As it was an off season for rare earth products,it was expected that prices of rare earth could continue turbulence at the bottom in short terms.Due to a sharp drop,demand for rare earth from downstream recovered.Affected by new energy vehicles,wind powder and energy-efficient appliances,production of rare earth permanent     

China rare earth market review

正August 1~10,2014 There was some good news in rare earth industry recently.Restructuring plans of rare earth groups led by Baotou IronSteel Group and Xiamen Tungsten Group respectively have been approved by MIIT.And rare earth storage policy,which had been expected for a very long time,has been launched officially.Pushed by the good news,rare earth price started to rebound since August 5.Price of didymium oxide and dysprosium oxide rose about 1% to 2%,averagely.About 10% of     

China rare earth market review

正July 1~10,2014Due to weak demand from downstream industry and slow transactions,rare earth market remained weak and price of rare earth products continued to decline.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,     

New energy vehicle:an opportunity for rare earth magnets

<正>Extracted from Securities Guide 1.Popularity of new energy vehicles—an irresistible market trend1.1 Progress of new energy vehicles Chinese Premier Li Keqiang said recently on a visit to Xi'an BYD Autos that new energy vehicles,especially new energy bus,can lessen environment and noise pollution.He encouraged the use of new