乌鲁木齐苇湖梁煤矿沉陷区遥感地质灾害调查研究

采用高分辨率遥感影像,在乌鲁木齐苇湖梁煤矿区开展了地面塌陷为主的地质灾害调查,查明了矿区地裂缝、塌陷坑和塌陷盆地分布和现状,以及矿山固体废弃物、矿山建筑物、排土场等矿山占地情况,分析了地面塌陷对乌鲁木齐市城市建设的破坏及危害,为进一步在该区开展矿山恢复治理提供科学依据。     

武汉市岩溶塌陷区域风险评价与管理研究

岩溶塌陷是中国分布范围较广的地质灾害之一。近年来,武汉市岩溶塌陷频发,严重制约了城市建设和社会经济发展。基于武汉市岩溶塌陷调查评价、防治工作现状,开展了岩溶塌陷区域风险评价和风险管理措施的研究。通过风险识别、风险量化和度量来分析影响因素,确定评价指标体系,采用层次分析法确定评价因子权重并选取适当评价模型,经综合评价,划分武汉市岩溶塌陷风险性分区。在此基础上探讨岩溶塌陷地质灾害风险管理措施建议,对武汉市岩溶塌陷地质灾害防控具有指导作用。     

四川古蔺岩溶区地质灾害发育特征及治理措施

古蔺县碳酸盐岩地层分布面积1561.8km^(2),占全区面积的49%,岩溶发育中等,岩溶区地质灾害主要类型有滑坡、崩塌和地面塌陷,共计50处,占全区地质灾害总数(133处)的38%。通过对岩溶区地质灾害的详细调查,在阐述了区域岩溶发育特征及影响因素的基础上,分析了地质灾害与岩溶的关系及其成因机理。分析表明:区内岩溶发育较为强烈的区域,地质灾害发育也较强烈;滑坡类型以岩溶风化形成的残积土层滑坡为主;危岩破坏模式多为由溶蚀裂隙控制的倾倒式崩塌;岩溶塌陷为土洞塌陷和冒顶塌陷,是在地下水侵蚀、自重、气团压缩、水流潜蚀等作用下形成。提出了地面防渗和加固支挡的治理措施。     

淮北市地质花园地质灾害危险性评估

以淮北市地质花园建设工程为例，对区内地质灾害现状进行了分析，并对工程建设引起的地质灾害危险性进行了预测评估。认为施工工程发生岩溶塌陷灾害的危害程度小，危险可能性也小。依据评估区的地质灾害种类，进行了危险性分区，将区内分为危险性大区、危险性中等区和危险性小区。在上述分析的基础上，分别就基坑边坡崩塌地质灾害防治措施和岩溶塌陷地质灾害防治措施进行了讨论，对于确保该区后续工程建设安全有一定的借鉴价值。     

焦作市区地面塌陷发育特征、成因及对策建议

焦作市区煤炭资源丰富,矿山密集。近年来,以地面塌陷等为主的矿山次生地质灾害频繁发生,已经成为该地区重要的地质灾害类型之一。通过对19处地面塌陷发育特征、危害程度、形成因素等的分析研究,初步查明焦作市区地面塌陷成因机制,并提出针对性防治措施,对焦作市乃至其他地区地面塌陷防治工作具有重要意义。     

武汉市地质灾害特征分析及防治对策研究

武汉市处于湖北省地质灾害易发区,滑坡、崩塌、地面塌陷等地质灾害普遍发育,主城区岩溶地面塌陷灾情严重。在通过开展地质灾害调查与区划工作的基础上,阐明武汉市地质灾害的分布及发育特征,总结防治工作的进展,并提出相应的防治对策,为防治地质灾害、保护地质环境、促进城市经济与社会可持续发展提供科学依据。     

层次因子综合预测法在岩溶地面塌陷地质灾害预测分析评估中的应用

岩溶地面塌陷地质灾害在碳酸盐岩区广泛分布。在对岩溶地面塌陷地质灾害的预测评估中,而半定量的评价方法较为实用。详细介绍了如何运用层次因子综合预测法对岩溶地面塌陷进行预测分析评估,此方法简单易用,值得推广。     

山西省地质灾害特点和时空分布研究

山西地处黄土高原东部,地形高差大,地质条件复杂,水土流失严重,极易形成崩塌、滑坡、泥石流等地质灾害。在综合前人研究的基础上,对山西省地质灾害的特点时空分布进行研究,发现山西省地质灾害具有以下特点:崩塌、地面塌陷、滑坡是山西的三大地质灾害;次生地质灾害是山西省地质灾害的主要形式,人类活动是山西地质灾害频发的一个重要诱因;3月—4月、6月—9月和10月是全省地质灾害的高发期;吕梁、临汾、忻州、长治、太原等市是全省地质灾害高发地区;东部褶皱山区和晋西黄土地貌区是全省地质灾害最易发的地区;黄土地地貌区是崩塌和泥石流的重点易发区;地面沉降和地裂缝主要发生在城市。该研究对山西省地质灾害的防治具有一定的指导意义。     

乌鲁木齐地区采煤塌陷特点、危害与治理研究

采煤塌陷为煤矿山次生的地质灾害形式之一。乌鲁木齐是我国受采煤塌陷影响较为严重的城市，已经制约了城市建设的发展规划并对现有建，构筑物带来危害。文章阐述了乌鲁木齐地区急倾斜煤层采煤塌陷机理、特点和危害形式，并对塌陷治理措施提出了建议。     

乌鲁木齐米东区油料转运站地质灾害危险性评估分析

对乌鲁木齐米东区油料转运站地质环境条件、地质灾害等进行了野外调查,结果表明:现状条件下评估区地质灾害危险性小,工程建设不易引发地面塌陷、地裂缝、崩塌、泥石流等地质灾害,也不易遭受地面塌陷、地裂缝、崩塌、泥石流等地质灾害。针对工程建设中可能出现的问题,建议采取坡率法等措施,防止因施工不当引发崩塌等地质灾害。     

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 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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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     

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.     

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.