RGIS软件2.5D人机交互反演的数据处理流程

2.5D人机交互反演是目前在重力资料解释中比较成熟的方法。本文以RIGS软件处理某工区重力数据为例,简要介绍下反演前的数据处理流程。提取剩余布格异常、网格数据提取剖面等。     

剩余磁异常的计算与深部磁性盲矿层的预测

在某磁铁矿勘查过程中,为了对矿层产生的磁异常进行计算并开展深部磁性盲矿层进行预测,在工作区开展了勘探线剖面图收集、钻孔对比、勘探线精测剖面、钻孔岩心磁参数测试计算,并进行2.5D人机交互反演工作。如果有较大的剩余异常,则在深部有盲矿层的可能性大,反之,则无。     

地面高精度磁法在山西省北岸铁矿勘查中的应用

山西省北岸铁矿工作区以往物化探工作程度底,异常信息量少,为了查明工作区内磁铁矿的分布、延伸及深部变化情况,利用地面高精度磁法,使用向上延拓、2.5D人机交互反演等方法,对异常做出解释推断和综合评价。通过地面高精度磁法资料的精细处理,圈定了磁异常范围,确定磁铁矿的分布范围和空间特性,为地质勘查工作部署提供了可验证靶区。     

FLAC和神经网络在隧道位移反分析中的应用

应用三维有限差分程序FLAC^3D和BP神经网络对隧道位移进行分析,使用正交实验和FLAC^3D正演结果作为样本,用神经网络建立围岩位移与反演参数的映射关系．反演得出了围岩的弹性模量和初始地应力测压系数,并使用FLAC^3D正算验证反演参数的精度．结果表明：可搜索得出反演参数的最优解,实现在隧道围岩中的位移反分析．可将反演结果用于隧道的设计,反演精度满足工程要求．     

EMAGE-2D软件在EH4资料解释中的应用研究

地球物理反演是地球物理数据处理和资料解释的重要环节。本文介绍了EMAGE－2D软件功能及其反演原理,通过对数值模拟数据和实测资料的反演,从软件的正确性和实用性方面对EMAGE－2D软件进行评价,认为EMAGE－2D软件数据处理自动化程度高,图示参数多,其二维正则化反演结果较一维Bostic反演可信度好,具有较高的实际应用价值。     

高精度磁法在新城铁矿找矿中的应用

新城铁矿赋存于太古宙变质杂岩中,属"鞍山式"沉积变质铁矿。利用高精度磁法面积性测量圈定了区内矿化体的范围;通过磁法精测剖面的2.5维反演,推断隐伏矿化体的赋存状态、规模和延伸,经钻孔验证可信;为矿区找矿提供了很好的指导作用。     

辽宁贾家堡子铁矿床磁力剖面2.5D反演模型计算应用

于辽宁贾家堡子铁矿区内开展异常圈定、矿致异常精测以及2. 5D反演模型建立、验证及参数校正工作,且建立的模型显示预计见矿深度与实际见矿孔深度相差2 m左右,模拟矿体与钻孔控制矿体几乎重合一致,该模型参数较为合理,对矿区钻孔设计以及矿体推断具有精确的指导意义。     

任意形状三度体磁场可视化人机交互反演

采用任意形状三度体人机交互反演方法解释复杂形态磁性体.其作法是采用直立线元法近似计算地质体产生的磁异常,利用可视化技术实现人机交互反演.通过理论模型分析了影响精度的因素:当剖分剖面数由17减为3时,近似计算的均方误差由0.099 nT增大到3.160 nT,说明剖分剖面数越多,近似计算的误差越小;当剖分剖面数固定时,地质体中心深度由100 m增加到500 m,近似计算的最大相对误差从39.19%下降到7.84%,说明中心深度越大,近似计算的误差越小.因此,合理确定剖分剖面教是提高精度的关键.提出了提高近似计算精度的2种措施:模型剖分准则和位场曲线约束模型准则.将该方法应用于澳大利亚艾尔半岛某矿区条带状含铁建造(BIF)的评价,控制钻孔证实了反演解释的结果.     

鞍本地区典型矿床的重磁特征及成矿预测

辽宁鞍山一本溪地区是我国重要的钢铁生产基地,是鞍山式铁矿的重要成矿区带。区内铁矿资源丰富,找矿潜力巨大,是我国寻找大型铁矿床的优势区域。重磁方法可以结合地质矿产和航磁等资料,运用成熟的2.5D重磁联合反演技术对实测数据进行解析,对区内地质构造进行划分和圈定,筛选一批矿致重磁局部异常,圈定以铁矿为主的找矿靶区,建立以重磁信息为主体的综合找矿标志,进行以铁矿为主的找矿预测。     

活性炭测氡及瞬变电磁法在矿山采空区调查中的应用研究

介绍了活性炭测氡、瞬变电磁法两种物探方法在山西小南村矿山踩空区测量效果。讨论了活性炭测氡异常、瞬变电磁法反演断面效果与钻孔验证情况的对应关系。结果表明,活性炭测氡-瞬变电磁法组合测量方法在矿山采空区调查具有较好的应用效果。     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness.     

Seven Rare Earth Projects Involving Close to 3 Billion Yuan Investment Landed In the HighTech Zone

正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully.