露天煤矿边坡稳态影响因子敏感性分析及滑坡控制对策

 通过现场地质调查,对胜利露天煤矿的滑坡形成原因和主要影响因素进行了分析,确定了滑坡主要导致因素为水的作用、岩性、开挖破坏、地震动等。考虑滑坡体岩性、荷载、加固力等具体情况,采用MSARMA法对边坡排水率Dr、岩体容重RR、底滑面的CB与φB值、侧滑面的Cs与φs值以及地震动影响系数Kc等边坡稳定性的影响参数敏感性进行了分析。得出排水率和地震动是影响边坡稳定的主要诱发因素,而边坡滑体的抗剪强度和岩体容重是影响边坡稳定的环境因素的结论。依据滑坡的影响因素和边坡稳态影响因子敏感性分析,制订了胜利露天煤矿边坡“疏排降水、锚索加固、削坡卸载和远程监测”滑坡控制对策。     

胜利西二号露天矿内排土场边坡稳定分析

通过对影响胜利西二号露天煤矿内排土场边坡稳定因素分析,确立可能的滑坡模式。运用Bishop法、剩余推力法,定量分析了不同排土场基底形态、不同排弃高度和不同边坡角条件下的排土场边坡稳定性。结果表明:影响内排土场边坡稳定性的因素主要有基底形态、排弃物料和基底岩层的物理力学性质、大气降水以及边坡形态。当基底岩层倾角3°时,排弃高度130 m,其稳定性边坡角为12°。     

露天煤矿软弱层滑坡灾变演化数值模拟分析

利用胜利露天煤矿边坡现场勘探资料,综合考虑边坡工程施工特性等因素,研究胜利露天煤矿的边坡灾害;根据其变形性质、发育特征、运动形式对产生滑坡的各种诱发因素进行组合概括,系统分析了滑坡的各种表象特征,对胜利大型露天煤矿软弱层滑坡灾变成因进行了探讨;采用工程地质分析方法对滑坡灾变机理进行了研究,并对滑坡灾变演化过程进行了数值模拟分析,为进一步分析和评价胜利露天煤矿滑坡机理提供了基础研究。     

红沙泉煤矿外排土场边坡稳定性影响因素分析

分析红沙泉煤矿外排土场边坡稳定性影响因素为目的,结合边坡地质条件和岩石力学参数,运用基于极限平衡理论的Geo-studio软件分析边坡的潜在滑移面及滑坡模式,计算边坡的安全系数,并分析各因素对边坡稳定性的影响规律。研究结果表明:边坡的滑坡模式为圆弧形滑动;当排弃至第5台阶时,安全储备系数为1.215;边坡稳定性随着含水率的增加而降低,随着边坡倾角的增加而降低,随着排弃高度的增加而降低。     

某露天矿含空区边坡稳定性分析

本文以某矿山含空区边坡突然滑坡为研究背景,为了找出造成此次滑坡的原因,预测边坡的稳定性状态,探讨此次滑坡的机理以及空区对边坡稳定性的影响。本文利用FLAC和Geo-Slope软件进行数值模拟,结合现场位移监测数据来综合判断边坡的稳定性状态,分析滑坡的机理和空区对边坡的影响。结果表明:边坡目前处于稳定状态,但是在以后的开挖过程中,铁路平台附近边坡可能会发生局部滑坡,需要重点治理;上部边坡岩体比较破碎,加上雨水入渗和爆破振动等外部因素的干扰,是造成此次滑坡的主要原因;空区对边坡的稳定不产生影响。     

降雨条件下顺层滑坡影响因素和稳定性分析

西区顺层岩质边坡位于四川某露天石灰石矿外，曾发生滑坡事故。在综合研究西区滑坡的基础上，分析了造成西区滑坡的影响因素，探讨了西区边坡的形成条件，采用Ks法、萨尔玛法两种关于边坡稳定性安全系数的计算方法，研究了西区边坡的稳定性．研究结果表明：在天然状态下西区边坡是稳定的，而在持续降雨、生产爆破作业等饱和状态下西区边坡是不稳定的，持续降雨是影响西区边坡稳定的主要因素．     

天文因素对矿山边坡的影响

在露天矿山的安全管理工作中,边坡管理是其中的一项重要内容。从天文因素的宏观角度出发,理论分析了日月引力对边坡的影响,探讨了滑坡的敏感期,是对影响矿山边坡稳定性理论的补充。并提出了天文因素造成滑坡的预防措施。     

平庄西露天煤矿西北帮滑坡特征及其稳定性评价

根据地质统计资料和滑坡观测资料，分析了平庄露天煤矿西北帮滑坡机制，确定其滑坡模式为座落式三维五面体滑坡。依据边坡岩体物理力学试验参数、边坡工程具体状况进行了稳定性计算。并利用正交方法分析了该边坡影响因素对过坡稳定性的作用，指出了生产中应注意的问题。     

西露天矿北帮边坡监测预警系统的研究与应用

抚顺西露天矿对北帮边坡稳定性进行研究,摸清影响北帮边坡稳定性的主要因素,特别是水和弱层的影响;分析滑坡机理,提出采用预应力锚索和雷达远程监控系统相结合的方法,从边坡内部应力变化和表面位移变化两方面,对北帮边坡进行监测和预警,能够及时掌握边坡稳定状态,有针对性的进行预防和治理,从而避免发生大规模滑坡灾害,确保下部现场作业人员及设备安全。     

黔北红层水库边坡稳定性分析及评价——以大沙坝左岸边坡为例

边坡的稳定性分析是治理滑坡的关键,以大沙坝水库左岸边坡工程为背景,简要介绍了影响红层边坡的稳定性因素,通过计算得到了2种工况下边坡的安全系数,并对边坡的稳定性进行简要评价。     

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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