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施工地质数码影像编录系统开发与应用 总被引:4,自引:0,他引:4
传统的施工地质编录方法一直困扰着地质专业技术人员,以往基于近景摄影测量的各种编录方案或设想,都没有从根本上解决编录模式、量测精度等方面存在的不足。本次研究注重多专业知识的交叉运用,主观研究与客观现场紧密结合,联合应用数字摄影测量、图像处理、CAD和GIS技术,设计开发了基于普通数码相机的施工地质数码影像编录系统。通过龙滩水电站的边坡、洞室、基坑实践检验表明:该系统实现了现场影像采集、机辅处理、CAD成图和数据库管理的一体化作业模式,有望逐步替代传统的手工作业模式,为水利水电工程施工地质编录带来新的技术变革。 相似文献
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岩体结构特征控制着岩体力学性质并影响岩体工程稳定性,因此岩体结构地质编录一直是岩体工程地质中的重要内容。针对露天矿山边坡,传统的岩体结构编录方法具有危险性大、效率低等缺点,需要引入新技术实现地质编录的安全、高效。随着近年来无人机的民用化,采用无人机倾斜摄影技术改进传统露天矿坡的地质编录工作将成为未来的发展趋势。本文以浙江某露天采石场矿坡为例,阐述了无人机摄影技术在地质编录中的应用方法和工作流程。基于无人机倾斜摄影技术,采用运动恢复结构法将点云数据转化为岩体三维数字模型,并利用点云的坐标信息实现对岩体结构面产状的解译。通过对比罗盘测量的产状和点云计算的产状验证了该技术应用的可靠性。在此基础上划分了结构面的优势产状,为分析矿山边坡稳定性提供了基础数据支持。 相似文献
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本文基于矿山地质编录工作重要性展开了勘查编录工作中数码成像技术措施的科学应用探析,就其可行性、博弈性、原理性展开研究,对提升矿山地质编录工作质量,优化地质编录效果有积极有效的促进作用。 相似文献
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综合考虑自动网格法和摄影测量技术各自的优缺点,提出了数字网格摄影测量法。介绍了该方法的原理与步骤,并将其应用到室内某滑坡模型试验的位移测试中。试验证明:数字网格摄影测量法可以快速、准确对模型体观测点位移进行量测,精度达到次毫米级,是一种比较理想的滑坡模型位移测试方法。 相似文献
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矿山条带开采相似材料模型变形测量 总被引:2,自引:0,他引:2
针对传统模型观测方法中存在的观测装置或传感器安装麻烦、工作量大、采样点有限等缺点,引入计算机视觉和数字近景摄影测量技术量测模型变形。用高分辨率数字相机获取不同模型,模拟开挖状态下的多组数字影像,选取二值化阈值对图像进行分割,根据标记区域的形状参数自动检测和识别标志点,通过边缘跟踪和椭圆拟合算法确定标志点中心坐标;推导了用二维直接线性变换关系式和共线方程分解出影像外方位元素初值的实用算法,利用光束法平差对标志点空间坐标进行精确定位。试验结果表明,空间坐标的测定精度高于±1mm,所测位移场与实际变形情况较为一致,可以满足矿山岩层和地表移动相似材料模型观测要求。 相似文献
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Emily Keeble David I. Whiteside Michael J. Benton 《Proceedings of the Geologists' Association. Geologists' Association》2018,129(2):99-119
Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco. 相似文献
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The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts 总被引:4,自引:0,他引:4
The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H2O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H2O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species. 相似文献
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Muriel Rocher Stéphane Baize Stéphane Jaillet Edward Marc Cushing Yannick Lozach Francis Lemeille 《Comptes Rendus Geoscience》2003,335(8):701-708
Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ1 roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003). 相似文献
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正20141756 Chen Ruige(Mathematical College,China University of Geosciences,Beijing100083,China);Zhou Xun Numerical Simulation of Groundwater Level Fluctuation in a Coastal Confined Aquifer with Sloping Initial Groundwater Level Induced by the Tide(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(7),2013,p.1099-1104,6 illus.,16 refs.) Key words:confined water,groundwater level 相似文献
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正20141408 Cai Jia(Institute of Geology,Chinese Academy of Geological Sciences,Beijing100037,China);Liu Fulai Petrogenesis and Metamorphic P-T Conditions of Garnet-Spinel-Biotitebearing Paragneiss in Danangou Area,Daqingshan-Wulashan Metamorphic Complex Belt(Acta Petrologica Sinica,ISSN1000-0569,CN11-1922/P,29(7), 相似文献
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正20142386An Guoying(China Aero Geophysical Survey and Remote Sensing Center for Land and Resources,Beijing 100083,China)Application of Satellite Remote Sensing in Regional Hydrogeological Investigation:Taking Cenozoic Strata in Wenquan Sheet(1∶250 000)of Karakoram Range as an Example(Geosci- 相似文献
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正20141016An Chengbang(Key Laboratory of Western China’s Environmental Systems,Ministry of Education,Lanzhou University,Lanzhou 730000,China);Zhao Yongtao Lake Records during the Last Glacial Maximum from Xinjiang,NW China and Their Climatic Impli- 相似文献
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正20141538 Cao Qing(School of Earth Sciences and Engineering,Xi’an Petroleum University,Xi’an 710065,China);Zhao Jingzhou Characteristics and Significance of Fluid Inclusions from Majiagou Formation,Yichuan Huangling Area,Ordos Basin(Advances in Earth Science,ISSN1001-8166,CN62-1091/P,28(7),2013,p.819-828,7 illus.,3 tables,43 refs.) 相似文献
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正20142002 Wei Hualing(Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang065000,China);Zhou Guohua Element Content and Mineral Compositions in Different Sizes of Soil in Tongling Area,Anhui Province(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(11),2013,p.1861 相似文献