基于构造影响特征的断层预测技术研究

为了防止采掘过程中无计划揭露地质构造和地质构造引发的灾害,丰富地质构造探测预报技术,开展了基于构造影响特征的断层构造预测技术研究,提出了利用构造影响特征推断前方断层及影响范围的思想和技术途径。通过对赵庄矿地质构造影响下突出危险指标、煤层厚度、夹矸厚度、瓦斯涌出等变化特征的分析,从中挖掘、提取这些信息特征—构造影响特征,建立了多维构造影响特征指标体系和断层构造综合预测模型,并在赵庄矿进行了成功应用。应用结果表明,通过分析采掘期间各种生产安全信息蕴含的构造影响特征变化情况,采用地质构造综合预测模型,能够实现工作面前方断层构造的超前预测,提高勘探钻孔施工的针对性,降低地质构造勘探的成本。     

地质构造对煤与瓦斯突出危险性影响研究

煤与瓦斯突出危险性受多种因素影响,其中地质构造对煤与瓦斯突出起着决定性作用。地质勘探关于煤与瓦斯突出的研究主要聚焦在宏观地质构造及其组合以及微观地质变化2个方面。通过深入研究宏观断层构造对煤与瓦斯突出的控制原理,分析了断层构造区煤层瓦斯赋存、煤层孔隙特性、煤层瓦斯吸附-解吸特性对煤与瓦斯突出危险性的影响效应,为煤与瓦斯突出灾害的防治提供理论参考。     

薛湖井田小断层对煤与瓦斯突出的控制作用

为了研究薛湖井田小断层对瓦斯赋存和煤与瓦斯突出分布的影响,基于地质构造对煤与瓦斯突出分布和瓦斯赋存规律的控制作用,分析了薛湖矿的地质构造特征,特别是小断层分布特点和性质,研究了不同走向的小断层附近瓦斯赋存和构造煤发育情况。结果表明薛湖井田经过多期构造运动改造后,小断层基本呈现压扭性,小断层附近区域煤体瓦斯富集,构造煤发育,煤体瓦斯放散能力强,具有很强的突出危险性。     

钱家营矿煤与瓦斯突出关键因素分析

针对钱家营矿5煤层、7煤层、9煤层、12煤层主要可采煤层赋存特征,通过对瓦斯压力、瓦斯含量、煤厚变异、地质构造、煤的结构特性和顶底板岩性的对比分析,以及运用模糊综合评价法求其评分,初步确定了地质构造因素具备突出关键因素的可能。结合瓦斯地质和钻探资料,地质构造因素能够很好地解释各煤层可能突出区域的强弱关系,符合煤与瓦斯突出是地应力、瓦斯、煤体结构共同作用的结果。依据断层埋深、断层长度、断层条数、密集程度和褶皱关系将地质构造因素划分成四个区域,运用层次分析法取其权重,量化了地质构造因素。综合结果表明,地质构造因素是钱家营矿煤与瓦斯突出的关键因素。     

构造煤与应力场耦合作用对煤与瓦斯突出的控制

以贵州省青龙矿为研究实例,重点探讨构造煤与构造应力场的耦合作用及其对煤与瓦斯突出的影响。分析了青龙井田地质构造演化,模拟和计算了现今构造应力场,总结了构造煤的类型及其分布特征。发现该矿煤与瓦斯突出位置是构造应力场中主应力差较低的区域,压性断层附近的构造煤具有分带现象,自断层面远离断层构造煤从韧性系列向脆性系列过渡。认为构造煤结构与构造应力场在时间上的耦合形成脆性-韧性变形的构造煤系列,在空间上的耦合导致构造煤在断层两侧的发育具有明显的分带性。构造煤与构造应力场的耦合控制了煤层瓦斯的产生、运移和聚集,并导致了在脆性-韧性构造煤条带状分布的压性断层附近易于发生煤与瓦斯突出。     

英岗岭矿区煤与瓦斯突出的构造特征

为了研究英岗岭矿区煤与瓦斯突出的地质构造特征,在大量统计英岗岭矿区各矿井煤与瓦斯突出事故发生情况和地质构造形态特征的基础上,对矿区瓦斯地质单元进行了划分,分析了矿区典型高突矿井断层和褶皱对煤与瓦斯突出的影响。结果表明:在受大型压扭性断层影响而发育的一系列由小型逆断层组成的叠瓦式构造区域,突出危险性大;褶皱的轴部和整个复向斜的构造收敛区域是煤与瓦斯突出的多发区;小褶皱或小断层发育并伴随煤厚由薄变厚区域易造成煤和瓦斯突出。     

演马庄矿煤与瓦斯突出地质因素影响分析

针对演马庄矿煤与瓦斯突出问题,通过理论分析演马庄矿实测资料,得出了地质因素在煤与瓦斯突出中的控制作用。认为区域构造在不同时期应力场的变化为煤与瓦斯突出提供了动能条件,而井田内张性小断层的存在决定了煤与瓦斯突出的位置,以及煤层顶板厚0.7 m左右的构造煤、煤体结构特征和低透气性煤层顶底板岩性为煤与瓦斯突出提供了有利的条件。     

龙山矿煤与瓦斯突出特征及主控因素分析

龙山矿是严重的煤与瓦斯突出矿井,该矿共发生过111次突出,依据实际瓦斯地质资料,运用瓦斯地质理论和构造演化理论,研究了区域、矿区和井田构造控制特征,对突出资料进行统计分析,总结出了龙山矿煤与瓦斯突出的特征,并分析了褶皱、断层、顶底板岩性和构造煤等地质因素对煤与瓦斯突出的影响与控制,认为褶皱构造对煤与瓦斯突出有重要影响,而断层构造和煤层顶板岩性控制着突出的发生和分布规律,为主控因素,为有的放矢地防治煤与瓦斯突出提供了方向。     

九里山矿煤与瓦斯突出地质控制因素及突出区预测

矿井地质因素对煤与瓦斯突出的分布规律影响很大,对准确预测突出区至关重要。简述了九里山矿井地质构造特征及煤与瓦斯突出概况,详细分析了该矿煤与瓦斯突出与煤层厚度及变化、断层构造、地下水活动情况等地质因素之间的关系,得出影响九里山矿煤与瓦斯突出的主要地质因素,采用了低临界值与等性块段叠加法预测了突出危险区,为以后采取有效防突措施奠定了基础。     

煤与瓦斯突出的地质构造影响因素研究

论文通过在我国某矿进行地质动力区划方法,查明了矿井构造应力的分布情况,确定了矿井的高应力区和应力梯度区。研究表明地质构造对煤与瓦斯突出的发生具有重要影响,褶皱、断层等不同的构造是地应力分布、瓦斯分布、构造煤形成的主要因素。研究结果为进行煤与瓦斯突出区域预测和防治工作具有指导意义。     

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。