TSP203在莲花岗隧道岩体结构超前预报中的应用

TSP203是目前国内采用的最为先进的超前预报探测仪器,主要用于隧道前方断层等大型不良地质体的预测,在隧道工程超前预报中具有较好的前景.以莲花岗隧道现场工程为依托,采用TSP203对于前方DK93+647～DK93+797段的岩体结构进行预报,并结合现场地质编录资料对结果进行解译,预报结果证实:当地质条件较为简单,在一定的预测距离内,TSP203对于Ⅳ、Ⅴ级结构面的预测具有较好的准确性.     

TSP203地质超前预报原理及精度提高的途径

TSP203是目前世界上最先进的隧道地质超前预报系统，介绍了TSP203的探测原理和提高探测精度的途径，并对精度的进一步提高进行了讨论。     

TSP技术在矿山井巷掘进及采矿生产中的应用探讨

探讨使用TSP技术进行矿山井巷掘进和采矿生产过程中的地质超前预报,为即将掘进的井巷、矿体内部的地质结构及其周围的地质状况提供有用信息。通过配套软件TSP win对岩体力学参数进行评估,获得地层变化的2D和3D图像,岩体中横波和纵波的波速、岩体密度、泊松比、岩体的弹性模量等,得出矿体围岩等级、长度、空间位置,可对不良地质体的空间分布、规模和类别如断层、岩溶及含水量进行预报,为超前支护和衬砌提供依据和参数,为不同地段和不良地质体的施工和采矿生产提供施工方案和解决措施。     

岩石与岩体性质的相关性研究

为了解岩石性质与岩体性质的相关性,通过对阳泉矿区的岩石和岩体进行测试,研究了岩石强度与岩体强度、岩石波速与岩体波速的相关性.结果表明,岩石单轴抗压强度与岩体强度具有相似的变化趋势,并且具有显著的线性变化关系,经过拟合后的公式可以较准确地进行岩石抗压强度与岩体强度的换算.岩石的波速均大于岩体的波速,通过比例系数K表示岩体...     

基于台网布置动态修正和岩体波速动态计算的微震监测方法研究

针对矿山开采不同阶段因岩体空间结构、应力分布、各向异性等变化引起微震监测误差,本文提出了一种基于台网布置动态修正和岩体波速动态计算的矿用微震监测方法,采用动态计算岩体波速,弥补矿山采掘过程中岩体参数变化引起的波速误差,利用动态修正台网布置和岩体波速,实现高风险源的针对性监测,从而进一步提高微震监测及分析的准确性。     

TSP203系统在明月山隧道超前地质预报中的应用

本文介绍了TSP203系统在明月山隧道工程中的应用。该隧道的地质和水文条件复杂,施工风险、难度大,通过TSP203系统对断层、岩溶等地质异常的预报,为科学、安全施工提供了依据。     

TSP203系统的数据存储与实践应用

TSP技术具有简便、快捷的特点,目前已被广泛应用于隧道的超前地质预报中。该文以TSP203系统在湖南汝(城)郴(州)高速公路田牛坪隧道超前预报中的应用为例,说明其预报效果;同时,利用UltraEdit软件对TSP原始数据文件进行研究,得到了TSP原始数据的总体存储格式。通过实践应用和研究可知,TSP203系统在应用中只能依赖其配套的软件进行分析处理,存在较大的局限性和盲目性。所以,研究国产化TSP系统和软件是当前亟待解决的问题。     

载荷下岩体波速的变化研究

波速是岩体物理力学性质的重要指标,通过对某水利工程坝址区平硐内岩体载荷前后声波速度的分析,获得岩体在载荷下的波速变化规律,为工程地质勘察评价坝址区岩体质量提供依据.     

基于超声波检测的岩体裂隙及注浆影响的试验研究

基于超声波检测速度快、对试样尺寸和形状要求低并且可以反映岩石强度的特点,通过室内试验模拟岩体裂隙及注浆过程,应用超声波检测技术测定岩体在不同裂隙宽度下声波传播速度,并对比分析了岩体注浆前后、干式状态及湿式状态的波速变化规律。结果表明:不同岩性的岩石波速差异较大,同一岩性的岩石,其波速也不尽相同,灰岩中波速相对最高,其次是砂岩,泥岩中波速相对最低;各类岩性的岩石纵波波速均随着裂隙宽度的增大而减小;在同一裂隙宽度下,随着含水量增加,波速增大;注浆后与未注浆时相比,波速也明显增大。通过本试验不仅认识了岩体裂隙及注浆的波速变化规律,同时试验也证实了利用超声波测试岩石内部声波速度是评价裂隙岩体注浆加固效果的一种有效手段。     

煤岩体声波波速随温度变化规律试验研究

为了研究温度对煤岩体中波速传播的影响,利用自制的声波参数测试系统试验研究了煤岩体波速随温度变化规律,以期为研究声波在煤岩体中的传播提供理论参考。研究结果表明:随温度升高,煤岩体试样内纵横波波速总体表现为减小,在减小过程中会出现波动现象。试样的波阻抗大小与波速大小之间具有高度正相关特性。温度的升高将使煤岩体内各种矿物成分发生热膨胀,但由于这些矿物种类不同,其热膨胀系数也不同,导致其中的微孔隙或裂隙发生增长和扩大,煤岩体孔隙结构发生变化,煤岩体弹性模量和波速减小;另外,温度的升高会造成煤岩体内矿物质或胶结物的变化,从而导致煤岩体弹性模量和波速的降低。     

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。