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论述了现代岩土钻凿工程的发展背景及其在各项建设工程中的应用领域和技术现状,简述了岩土钻凿用设备的发展;并对我国岩土钻凿工程发展方向提出了若干建议。 相似文献
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钻孔直径超过3(口尺)时一般称之为大直径钻孔。大直径钻孔目前应用日益广泛,例如用以开凿矿山竖井,钻凿供通风、运输、排水的专用竖井,用于进行特种地下试验,以及用于建筑物(如桥梁等)基础等。 相似文献
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本文从香港的工程地质和岩土工程概况,岩土钻凿工程设备的制造,销售,租赁等方面简要介绍了香港岩土钻凿工程业的现状,并着重介绍了香港汉机工程公司的产品及技术性能特点。 相似文献
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锚孔钻凿设备是锚固技术的关键之一。本文介绍了国内外锚固孔钻凿设备主要技术性能及特点,并对其主要钻孔工艺方法进行了评述,介绍了国内外锚固设备的发展现状与趋势,国内市场预测,并提出了若干建议。 相似文献
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近几年来,我们应用泵吸反循环钻进成孔工艺在郑州市环城快速路两座立交桥、洛三高速路桥共钻凿灌注桩孔88个,取得了良好的经济效益和社会效益,为类似地层施工提供了可供借鉴的经验。现对不同工区钻凿灌注桩桩孔技术资料进行类比分析,以供参考。 相似文献
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钛矿资源及其开发利用 总被引:3,自引:0,他引:3
钛金属因其特殊性能和广泛用途被称为“第三金属”,90%以上的钛矿物被用于TiO2颜料的生产,其次为宇航工业等。金红石和钛铁矿是提炼金属钛的主要原料。我国钛铁矿储量居世界之首,其精矿可满足国内钛工业需要,金红石资源较贫乏,原料供不应求。目前世界钛工业总形势是供大于求 相似文献
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地球深部流体与油气生成及运移浅析 总被引:9,自引:0,他引:9
近年来的研究工作表明,流体不仅存在于地球表层及上地壳,而且也大量存在于地球深部(下地壳及地幔),其成分以H2O和CO2为主。由于特定的温度和压力条件,流体均呈超临界状态存在,它们是能量与物质的运移载体。由于其独特的性质,因而它们不仅参与了深部油气的无机生成,而且也对油气的富集及向上运移成藏起了重要作用。 相似文献
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我国红宝石、蓝宝石及其包裹体 总被引:2,自引:1,他引:2
我国红宝石和蓝宝石矿床有岩浆型、接触变质型、伟晶岩和砂矿等,岩浆型为主要矿床类型。红宝石以玫瑰红为主,血红色少见;粒度一般为5mm±。蓝宝石为靛蓝色,墨水蓝罕见;粒度一般5~50mm。两者莫氏硬度为9±0.1,比重4±0.1。宝石中有晶质包裹体、熔融包裹体、流体包裹体、含子矿物多相包裹体、CH包裹体。岩浆型和接触变质型宝石中包裹体均一温度≥1380℃,压力(1~24)×10~8Pa。根据包裹体信息指出:指纹包裹体及其中CH包裹体是天然宝石的鉴别标志。宝石的颜色与亲铁元素及CH包裹体有关。星光宝石与六面针包裹体有关。 相似文献
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Anshu K.Sinha 《地学前缘》2000,(Z1)
he 2500km long Indus\|Tsangpo Suture has been recognized as one of the best examples of continent to continent collisional Suture Zone. It has come into existence as a result of subduction followed by continental collision (55~60Ma) between Indian (Sinha, 1989, 1997; Sinha et al., 1999) and Eurasian plates. While considering the recent palaeogeographic reconstruction of Pangea during late Palaeozoic it appears that a southern belt of Asian microcontinents stretching from Iran and Afghanistan through southern Tibet to western Thailand, Malaysia and Sumatra, comprise several continental blocks and numerous fragments that have coalesced since the Mid\|Palaeozoic along with the closure of Tethys. The origin, migration, assembly and timing of accretion of all these blocks to their present geotectonic position is not well known and there is no Permo—Triassic crust left in the present day Indian Ocean. The oldest ocean crust adjacent to the west African and Antarctic margin is of early or middle Cretaceous age (approximately 140~100Ma) (Searle, 1991). The Karakoram\|Hindukush microplate in the west and the Qiangtang\|Lhasa block in the central and eastern segment of South Asia margin are among those blocks already welded with Asian plates around 120~130Ma ago, before the collision of India (55~60Ma) with the collage of plates forming Peri\|Gondwanian microcontinents. But the reconstruction of palaeogeographic configuration remain incomplete due to paucity of authentic geologic information available from Karakoram, Pamir and Western Tibet. Prior to our discovery no early Permian plant remains and palynomorphs were ever reported from Karakoram terrane. Our discovery of Early Permian remains and late Asselian (about 280~275Ma) palynomorphs provides crucial clue regarding the palaeogeographic reconstruction of the Karakoram\|Himalayan block in the Permian time. 相似文献
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《International Geology Review》2012,54(2):93-102
Western Georgia is in the eastern part of the Riono-Black Sea intermontane oil and gas reservoir. Coastal Abkhaziya and the Colchis Plain is favorable for oil and gas prospecting as Mesozoic sediments are here overlain by a series of Tertiary and Quaternary rocks. From the Recent tectonic pattern, evolution, age, and composition of the present complexes the authors could outline three tectonic regions: Guri, Colchis and Abkhazsko-Megrel. The geological pattern of the Colchis region has recently become better known. Borehole data indicate the presence of a heavy Cretaceous carbonate series (over 1, 000 m thick) overlain with sharp angular unconformity by Pliocene and Quaternary argillo-arenaceous sediments. From data obtained by seismic prospecting, drill-hole exploration and geological survey the conclusion that all brachyanticlines in the Colchis region might be grouped into three anticlinal zones, namely northern-Colchis, central Colchis and southern Colchis. Within the northern Colchis zone three brachyanticlines (Ingur, Ochemchiri and Kodor) are distinguished. The same confinement of separate uplifts to the anticlinal zones may be observed in the Abkhazsko-Megrel and Guri regions, where an overall complex of Tertiary sediments is developed. In the area under discussion two structural layers are isolated: the lower Domeotic and the upper, consisting of Pliocene- Quaternary rocks. The lower layer is characterized by intermittent folding, the upper one -- by nearly horizontal bedding. The oil content of the Cretaceous sediments in Western Georgia is known from drilling data and abundant oil and gas occurrences. In this connection certain Colchis brachyanticlines are of great interest for oil and gas prospecting within the Cretaceous carbonate complex. 相似文献