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通过对某煤矿主斜井与副立井贯通测量的工作实践,对一井定向联系测量提高定向精度的方法进行了探讨,对影响一井定向联系测量精度和应注意的问题进行了总结。 相似文献
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针对钱营孜煤矿西三轨道上山精准对穿巷道疏放水钻孔施工距离长、精度要求高、地层断层成孔性差等技术难点,通过对大功率定向钻进装备优选、钻孔轨迹精确设计、钻孔轨迹精准控制、复合定向钻进强排渣等方面的技术研究,实现疏放水孔钻进至443 m从目标巷道预定区域精确对穿贯通,上下误差0.19 m,水平位移误差1.72 m,自2017年10月28日巷道贯通后,截止2017年12月1日总出水量3200 m3,有效保障西三轨道上山和西三回风上山的掘进安全。 相似文献
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随着古地磁学与磁法勘探研究的不断深入,岩矿标本的定向精度要求越来越高。保证岩矿标本的定向精度,是古地磁研究和磁法勘探定量解释能取得良好效果的关键之一。这篇文章的重点,是介绍在任意面上采集定向标本及其坐标换算以及一种太阳罗盘定向法。 相似文献
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定向岩芯的地面处理包括以下内容:定向误差的检查;定向回次成败及精度等级的判定;定向失败回次的挽救;刻划最低母线;结构面参数的测定;非扰动定向岩样的处理等。经过地面处理后的定向岩芯其上面有作为定向标志的最低母线,其岩芯上的结构面均已测取了必要的参数,并以表格的形式向地质人员提供定向资料。通过这些资料,地质人员即可了解到钻孔的定向情况。如定向误差、精度、结构参数,定向成功率等。 为了进一步完善和发展定向岩芯的地面处理,笔者现就以下几个问题进行探讨。 相似文献
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本文通过对地下直伸导线的精度分析,说明了在水工隧洞施工中,加测陀螺方位角能够提高贯通精度,并指出了加测方位角的最佳位置。 相似文献
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林滩场构造多期节理构造特征及其意义 总被引：6，自引：0，他引：6
通过对林滩场背斜大量节理面及擦痕的观测,运用构造解析方法,结合节理缝空间几何特征和岩石学等研究方法对120余组多期(共轭)剪节理构造破裂滑动古应力进行反演,结果表明林滩场地区主要经历了5期构造运动:NW-SE向(主应力σ1方位:140°～160°)挤压运动、近南北向(主应力σ1;0°～10°)挤压运动、NWW-SEE向(主应力σ1方位:290°～300°)挤压、NNE-SSW向(主应力σ3方位:190°～210°)和近E-W向(主应力σ3方位:180°～200°)拉张构造运动.基于节理缝几何特征与多期构造运动配置关系,将其分为两大类5小组,即贯通(跨层)和非贯通(层内一层间)类,第一、二、三组剪性非贯通节理系,第四、五组张性贯通节理系,晚期张性贯通节理裂缝系对区域油气保存条件破坏和裂缝性储层储集空间改善具有重要的影响. 相似文献
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在超基性岩体上采集岩石定向标本时,因受强磁性岩体磁场的干扰,不能使用罗盘定向,利用经纬仪定向又很不方便。我队自1963年以来应用了日晷仪定向法,提高了工作效率,精度满足磁法规范的要求。现将日晷仪定向法的原理、工作方法和测量误差介绍如下。 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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Gilles Serge Odin 《Comptes Rendus Geoscience》2002,334(6):409-414
Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414. 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 Lozac&#x;h 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20141520 Bo Ying(Key Laboratory of Metallogeny and Mineral Assessment,MLR,Beijing 100037,China);Liu Chenglin Saline Spring Hydrochemical Characteristics and Indicators for Potassium Exploration in Southwestern and Northern Tarim Basin,Xinjiang(Acta Geoscientica Sinica,ISSN1006-3021,CN11-3474/P,34(5),2013,p.594-602,5 illus.,3 tables,28 refs.) 相似文献
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正20141243Chen Ge(Hangzhou Research Institute of Petroleum Geology,PetroChina,Hangzhou 310023,China);Si Chunsong Study on Sedimentary Numerical Simulation Method of Fan Delta Sand Body(Journal of Geology, 相似文献
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正20142599Chen Sanming(Guangxi Key Laboratory of Concealed Deposits Exploration,Guilin University of Technology,Guilin541004,China);He Yuzhou Block Model and Reserves Estimation of Panzhihua Iron Deposit Based on 3D Geological Modeling(Journal of Guilin University of Technology,ISSN1674-9057,CN45-1375/N,33(4),2013,p.610-615,9illus.,1table,15refs.) 相似文献
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正20140594 Bai Daoyuan(Hunan Institute of Geology Survey,Changsha 410016,China);Zhong Xiang Faults in the Jingzhou Basin and Their Tectonic Settings(Geotectonica et Metallogenia,ISSN1001-1552,CN44-1595/P,37(2),2013,p.173-183,6illus.,59refs.)Key words:basin evolution,tectonic setting,South China In the Upper Paleozoic and Jurassic se- 相似文献
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正20141912Cao Hui(State Key Laboratory for Continental Tectonics and Dynamics,Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China)Gravitational Collapse and Folding during Orogenesis:A Comparative Study of FIA Trends and Fold Axial Plane Traces(Geology in China,ISSN1000-3657,CN11-1167/P,40(6),2013,p.1818-1828,9illus.,35refs.,with 相似文献