云南羊拉铜矿里农矿段采空区充填方案优化

采用空场法开采易遗留大量采空区,采空区的存在既影响了矿山安全生产,又影响了对矿产资源进行有效回收,造成了矿产资源损失。羊拉铜矿里农矿段主要采用底盘漏斗空场法、全面法、近地表崩落法、房柱法生产,经过多年开采,采空区体积已达到117.55万m~3。结合矿山生产实际情况,采用充填方案处理采空区,并采用FLAC~(3D)数值模拟方法对充填方案进行了优化,确定了充填方式及充填体强度,可为同类矿山采空区处理提供借鉴。     

采空区的充填治理

根据石人沟铁矿矿体赋存条件和采空区等实际问题,论述了一种简单、实用、高效的采空区充填方法治理-60 m以上采空区的技术要点,以尽快消除目前大量存在的采空区对以后矿山生产造成的安全隐患与事故危害。并提出了-60 m以下应用充填法采矿时需要注意的安全事项和技术措施,为实现矿山稳产、高产和提高矿山采空区治理水平,加快绿色矿山建设步伐打下了坚实基础,也可为同类矿山充填法采矿和采空区治理提供参考。     

东升庙铅锌矿采空区治理研究

东升庙铅锌矿井下采空区约80.3万m3,矿山采用充填法和崩落法2种方式治理采空区,重点介绍了3#矿体采空区充填治理。并在治理采空区的过程中辅以现代科技监测手段,并且通过优化采矿方法等措施管理采空区,为井下生产提供安全指导。通过治理采空区,可从根本上排除矿山存在的最大安全隐患,达到安全持续稳定生产的目的。     

尾砂胶结充填技术在紫金东坪金矿的应用

紫金东坪金矿井下的采空区多年来一直没有进行实际充填,采空区的危害逐渐显现,为了及时、安全、有效地进行采空区处理及回收矿柱,避免地表塌陷,矿山建设尾砂充填系统,采用胶结充填技术,处理矿山遗留采空区。通过实施尾砂胶结充填,降低了井下生产的损失率和贫化率,安全、高效回收地下资源,创造更好的经济效益和社会效益。     

露天境界内地下采空区处理方法技术研究

由于偷采、盗采,大宝山矿业有限公司露天矿坑下形成了大量的盲采空区,严重影响矿山安全生产,为此,对盲采空区进行探测和安全防治,针对不同采空区采用不同的方法:单层采空区采用中深孔或切割孔爆破;多层采空区采用分层分次处理法和侧翼揭露崩落充填法,采空区治理达到了较好的效果。     

潘洛铁矿采空区处理施工方案

潘洛铁矿2号矿体采空区上盘和顶板暴露面积较大,而且空区形状不规则,一旦发生空区围岩失稳,将对整个矿山带来巨大灾难.为实现安全生产,采用废石充填天井处理采空区.通过对传统掘进工艺(吊罐法、深孔爆破法)、全断面掘进工艺进行比选,从而确定选用全断面钻进法施工废石充填井.     

洛钼露天矿复杂采空区治理一体化技术应用

介绍了洛钼露天矿采空区探测、采空区稳定性监测和采空区处理一体化技术。洛钼露天矿采用高密度电法和地震映象法对采空区位置进行初探,再利用钻孔探测和三维激光探测方法对采空区赋存形态进行精确探测。利用微震监测技术对采空区稳定性进行全天候、实时和立体监测,在对矿山采区岩体稳定性微震量化评估、爆破震动对采空区稳定性影响和采空区治理前后稳定性监测等方面取得了很好的应用效果。采用碎石充填和控制爆破技术对不同采空区进行处理,并根据采空区的赋存特点和处理的难易程度,对采空区进行分类一次处理或分次处理。洛钼露天矿采用该一体化技术已经成功治理了大量采空区,保障了矿山的安全生产,对矿山的可持续发展有着重要的意义,对国内外相似矿山有重要的参考价值。     

金属矿地下采空区探测、处理与安全评判

我国大多数金属矿山都不同程度的存在地下采空区,且隐患较多,严重危及矿山安全生产．采空区探测方法目前主要有：高密度电阻率法、地震映像法、探地雷达法以厦激光3D法等,采空区处理可以采用尾砂肢结充填法和地表强制崩落法,利用微震监测系统可对采空区的异常行为进行实时监测．根据岩石力学理论和三维数值模拟计算,结合我国一些金属矿工程实例研究,提出了地下采空区顶板稳定性的综合安全评判方法．为了确保有复杂地下采空区的金属矿山的安全开采,建议建立对采空区从探测,监控,处理到数字化安全评判的一体化管理体系．     

地表充填钻孔治理矿山采空区的研究

根据井下隐伏采空区的形态,综合考虑安全、技术经济指标,初步优选适宜的处理方法为充填法。采用地表钻孔重力输送破碎废石处理隐伏空区,从地表施工5个Φ350mm钻孔连通隐伏采空区,将废石破碎至Φ50mm后在自重作用下充填采空区。不仅解决了矿山存在的安全隐患,保证了企业正常生产,还有效利用了固废资源,推进了绿色矿山的建设,综合效益显著。     

大型复杂采空区处理方法的研究和应用

采空区治理是关系矿山可持续发展的关键因素之一.广东省大宝山矿业有限公司采用中深孔强制崩落和废石充填的联合方法对大宝山矿576特大采空区群进行了处理,并且借助ANSYS三维有限元程序模拟空区处理前后的稳定性状况,为矿山安全生产提供了重要保障.     

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     

矿用防爆轴流对旋主要通风机叶片ANSYS模态分析及应用

高效节能矿用防爆对旋主要通风机的叶片是主要通风机运行的关键部件,叶片在运行时不断受到气流的作用力,从而使叶片产生振动,当叶片振动的频率与叶片的固有频率接近时,容易产生共振从而导致叶片的断裂。一旦叶片断裂时,对主要通风机的安全运行产生致命的影响,从而导致矿山、化工等企业发生重大事故,将会产生不可估量的损失。基于有限元分析软件ANSYS,对高效节能矿用防爆轴流对旋主要通风机叶片进行模态分析及产生对应的六阶模态频率,对主要通风机叶片的运行频率、固有频率及产生的共振问题进行了原理分析,并且解决了叶片频率共振的问题,从而为主要通风机叶片结构设计提供理论依据,并对主要通风机叶片的安全运行提供保障。     

2013 NdFeB export analysis

<正>China totally exported nearly 24,000 tonsof NdFeB products during 201 3,including 18,825 tons of permanent magnet,valued USD 1.34 billion at an average price of 71.4 USD/kg;3,277 tons of NdFeB magnetic powder,valued USD 1 01 million at an average price of 30.9 USD/kg;1,334 tons of strip casting ribbon,with total export value of USD 74million at an average price of 55.3 USD/kg;and 586     

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     

唐口煤矿深部复杂开采工作面瓦斯分源涌出规律研究

研究工作面瓦斯涌出规律对工作面瓦斯治理有重要意义。为了得到唐口煤矿深部3号煤层复杂开采条件下工作面回采时期瓦斯涌出时空演化规律,选取6304工作面作为对象,采用实测方法研究6304工作面瓦斯涌出规律。结果表明:6304工作面瓦斯涌出量为6.534 m³/min,其中煤壁占34.27%,落煤占29.62%,采空区占36.11%;沿工作面倾向由低到高,瓦斯浓度整体为上升趋势,其中1—76号架工作面瓦斯浓度小于0.20%,76—102号架瓦斯浓度上升明显,最大为0.387%;上隅角的后部采空区是工作面的瓦斯主要涌出源,上隅角1号测点瓦斯浓度0.78%,上隅角周边3号、5号、7号、8号、9号测点瓦斯浓度平均为0.643%;周期来压时,上隅角瓦斯相对平时较高。研究为针对性的瓦斯分源监控与灾害防治提供基础。