共查询到20条相似文献，搜索用时 40 毫秒
1.
GUO Fusheng LI Guangrong WU Zhichun YANG Haiyan LIN Ziyu ZHOU Wanpeng 《《地质学报》英文版》2020,94(4):1319-1320
正Objective Three-dimensional (3D) subsurface geological models have been gaining considerable attention wordwide. 3D geological surveys and modelling in the Xiangshan uraniferous volcanic basin, Le’an county, Jiangxi Province is a pilot project of the China Geological Survey. The Xiangshan volcanic basin is the third largest volcanic-type uranium ore field worldwide. This basin is composed of Lower Cretaceous rhyodacite and porphyritic lava with 相似文献
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M. K. Ansari M. Ahmad Rajesh Singh T. N. Singh 《Journal of the Geological Society of India》2018,91(1):47-56
The Saptashrungi gad temple (SGT) situated on basaltic hills belongs to Deccan volcanic of Upper Cretaceous to Lower Eocene, is one among the 51 Shakti Peeths and most holy place for pilgrims. Rockfall is a major problem in the past and causing danger to the lives of the villagers settled at the toe of the SGT hill as well as the pilgrims who perform parikrama along the tracks. On the evening of 16 April 2011, an old woman died due to rockfall at SGT hill when she was performing parikrama, moreover, two persons got injured during the deliverance process of this old woman from the continuous rockfall activity. The problem of rockfall could be linked to rainfall, jointing, weathering, man-made or the compounding of all. In this research, the rockfall hazard analysis at SGT hill is assessed using both 2D and 3D rockfall programs along the two parikrama paths: Parikrama Path 1 (or the Badi Parikrama Path ‘BPP’), and Parikrama Path 2 (or the Chhoti Parikrama Path ‘CPP’). Also, the study area of the SGT hill has been divided into eight zones (Zone#01 to Zone#08), based on field observations, orientations of joint sets and hill slope faces and eighteen topographic profiles (AA' to RR') have been taken from these eight zones for rockfall analysis. A detailed topographic survey along with field investigation has been carried out along the temple for ascertaining the nature of rock, discontinuity orientations, and slope geometry. DEM has been generated using topographic profile in ArcGIS to facilitate the 3D rockfall analysis. Maximum rock block sizes are taken into the analysis and run-out distance, bounce height, kinetic energy and velocity of the basaltic blocks are evaluated separately. Based on the analyzed data, the rockfall hazard zone map has been prepared and site having potential rockfall risks have been identified. Finally, wire/net meshing has been proposed after removal of unstable blocks as a stabilization and protection measures.It is worth mentioning here that for the first time rockfall hazard assessment was made in such detail for a site. Suggestions made are implemented by the State Government for the protection of the temple as well as the life of pilgrims performing the parikrama from the rockfall. 相似文献
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Haris Ahmed KHAN Ali Asghar SHAHID Muhammad Jahangir KHAN Taher ZOUAGHI Maria Dolores ALVAREZ Syed Danial Mehdi NAQVI 《《地质学报》英文版》2023,97(1):256-268
This research is focused on the analysis of the sequence stratigraphic units of F3 Block, within a wave-dominated delta of Plio–Pleistocene age. Three wells of F3 block and a 3D seismic data, are utilized in this research. The conventional techniques of 3D seismic interpretation were utilized to mark the 11 surfaces on the seismic section. Integration of seismic sequence stratigraphic interpretation, using well logs, and subsequent 3D geostatistical modeling, using seismic data, aided to evaluat... 相似文献
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在学习理解SmartPlant3D软件的基本架构、数据库体系和规则的基础上,通过开展用户化定制、数据库建立、成品输出定制等工作,实现了新一代三维工程设计软件SmartPlant3D在实际工程设计中的成功应用。与PDS软件相比,SmartPlant3D的数据库架构不够简洁紧凑,与AutoPLANT软件相比,在设计建模的易用性方面,二者互有优缺点。 相似文献
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3D Quantitative Predictivity of Concealed Ore Bodies in Fenghuangshan Copper Deposit, Tongling District, China 总被引：1，自引：0，他引：1 
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6.
Hakim Saibi 《Computational Geosciences》2011,15(4):709-719
The Obama geothermal field is one of the most interesting geothermal areas in Kyushu Island, Southwestern Japan, because of
its large number of high-temperature springs. A 3D numerical simulation study using the simulator TOUGH2 (module EOS3) was
carried out to obtain a comprehensive hydrothermal model of the field. From previous geochemical studies, two main fluid sources
were suggested for the Obama geothermal system: cold (sea, surface, and ground) water and deep geothermal fluids. We propose
two heat sources, a lateral one at the eastern boundary of the system, near the West Unzen High Temperature Body located west
of the Unzen fumarolic field, and a second one beneath the Obama geothermal field. The first source contributes the system
by 150°C fluids. The second source contributes by 100°C fluids. Our model indicates that the first source has a temperature
of 150°C, which agrees with the results from previous geochemical studies. The low enthalpy of the second source could be
explained by the mixing of geothermal fluids with seawater, as the area is near the seashore and is highly faulted. The model
that was developed can explain many of the subsurface processes active in the Obama geothermal field. 相似文献
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3D 定向钻孔雷达系统能够对钻孔四周进行高精度三维成像,在单个钻孔中即可完成目标体距离、方位的探测,相对2D钻孔雷达具有探测精度高、速度快、深度大的优点.笔者对3D 定向钻孔雷达系统的工作和成像原理、技术规格进行了详细说明,并结合现场数据说明了其实际应用效果. 相似文献
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大地电磁法及其发展－音频大地电磁法与可控源音频大地电磁法,已广泛应用于矿产,石油及地热资源勘探中。尽管所测量的结构是三维的,但通常所应用的仅是二维或一维解释。在本项工作中,我们探讨在三维结构以大地电磁合成数据的三维反演适用性。 相似文献
10.
复杂地层结构的2D、3D剖面显示技术研究 总被引：1，自引：2，他引：1
将计算机图形学扫描线区域填充算法应用于地质科学计算可视化。是图形工程应用领域的扩展。这里应用改进扫描线算法，实现了复杂地质结构的地质属性填充的二维、三维剖面图绘制．为地质专家直观观察地质空间数据．有效分析空间数据提供了逻辑思维空间平台。这里分析了改进扫描线算法的实现技术思路，并讨论了剖面树ST和有效表AT的数据结构及其改进扫描线算法实现步骤和面向对象类封装的实现软件结构，最后还给出了该算法应用Delphi和OpenGL实现二维、三维复杂地质属性剖面图绘制实例。这些实例表明了这种算法是可行的。 相似文献
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大量的工程实践表明,岩体往往是沿着软弱结构面发生破坏的,而岩体结构面粗糙度是决定岩体结构面力学性质的重要因素。目前岩体结构面粗糙度的研究多集中于2D角度,但仅由一条剖面轮廓线来表示结构面的结构特征显然是不全面的。因此岩体结构面粗糙度表征方法应拓展到3D角度,全面地从三维曲面特征来进行评价。在参考大量文献的基础上,将二维角度的几个几何参量延伸至三维角度,提出面积扩展率S、结构面起伏度Rs,并通过平均粗糙度系数JRCS来表征三维角度的结构面粗糙度。以秭归马家沟滑坡为例,采集结构面并获取表面信息,通过统计分析和数值模拟的方法,得出三者之间的回归方程。在已知面积扩展率S、结构面起伏度Rs的基础上,可计算出平均粗糙度系数JRCs,用以判断岩体结构面在3D角度下的粗糙度大小。 相似文献
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“深度成像”是近年来使复杂的构造地震成像发生深刻变化最具决定意义的技术。与常规时间成像相比,深度成像明显的优点是揭示了盐下构造的形态和提高了成像的清晰度。本文将重温偏移成像的基本原理,并着重论述了一种用于层速度分析的稳健技术－用３－Ｄ叠前深度成像估算层速度和反射层位置。 相似文献
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基于计算机视觉的地形3D重建 总被引：1，自引：0，他引：1
构造3D地形模型有很多种方法．本文提出一种用数码相机获得的未标定照片获取三维地形模型的简单方法．这种方法仅需要从两幅或多幅照片中选取对应点,根据这些对应点,求出基本矩阵,摄像机矩阵,进而进行三维地形表面的估计,实验结果及算法分析表明,本文提出的特征匹配算法精确度较高,实现地形重建方法切实可行,生成的模型可视效果较好。 相似文献
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昆明白泥井3号隧道围岩稳定性FLAC3D模拟 总被引：4，自引：2，他引：4
应用FLAC^3D数值模拟软件对昆明白泥井3号隧道围岩稳定性进行了分析和评价。结果表明隧道支护后围岩的最大变形出现在隧道右侧拱顶，为1．00cm；隧道支护后左侧拱和右侧拱脚处剪应变明显增大，为应力集中区；围岩可以通过自身应力、应变和能量的调整，使整个隧道围岩处于稳定状态；同时也表明FLAC^3D用于隧道围岩变形分析是可行的。 相似文献
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以安徽淮南某矿3D3C勘探施工中地面设备的实际布排为例，介绍了snake技术的应用以及其对施工效率及经济效益的影响，对如何更有效的利用该技术起到了一个抛砖引玉的作用。 相似文献
18.
The Renard 2 kimberlite pipe is one of nine diamondiferous kimberlite pipes that form a cluster in the south-eastern portion of the Superior Province, Québec, Canada and is presently being extracted at the Renard Mine. It is interpreted as a diatreme-zone kimberlite consisting of two Kimberley-type pyroclastic units and related country rock breccias, all cross-cut by coherent kimberlite dykes and irregular intrusives. Renard 2 has been the subject of numerous diamond drilling campaigns since its discovery in 2001. The first two geological models modelled kimberlite and country rock breccia units separately. A change in modelling philosophy in 2009, which incorporated the emplacement envelope and history, modelled the entire intrusive event and projected the pipe shape to depth allowing for more targeted deep drilling where kimberlite had not yet been discovered. This targeted 2009 drilling resulted in a > 400% increase in the volume of the Indicated Resource. Modelling only the kimberlite units resulted in a significant underestimation of the pipe shape. Current open pit and underground mapping of the pipe shape corresponds well to the final 2015 geological model and contact changes observed are within the expected level of confidence for an Indicated Resource. This study demonstrates that a sound understanding of the geological emplacement is key to developing a reliable 3D geological and resource model that can be used for targeted delineation drilling, feasibility studies and during the initial stages of mining.
相似文献19.
3D3C地震资料在煤系地层岩性预测中的应用 总被引：3，自引：0，他引：3
各种不同的岩性在纵波和横波速度上均存在交集 ,因此单纯依靠任何一种波场速度是无法预测岩性的 ,但P波与PSV波的速度比或泊松比就可以大大减小各岩性间存在的交集容量 (Garotta ,2 0 0 0 )。速度比或泊松比除了可以反映岩性外 ,还是很好的油气识别参数。在对钱家营煤矿三维三分量 (3D3C)地震数据的构造和层位解释的基础上 ,我们利用P波和PSV波的时差特点 ,分别计算了煤层层间的速度比 ,以预测岩性的变化 ;利用P波和PSV波反射和频带特征的差异及纵波波阻抗和横波波阻抗的差异对比识别薄层 ,并进一步研究了煤系地层顶底板沉积相的变化… 相似文献
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