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钻孔漏失是钻探施工中一直较难解决的难题,尤其是绳索取心钻进施工中的严重漏失,造成钻进效率低、施工成本高的后果,严重的直接威胁钻孔安全、甚至会导致钻孔报废。 Aus-Plug是2006年自国外引进的高效延时膨胀钻孔堵漏剂,Aus-Plug钻孔堵漏剂的使用较好地解决了我院绳索取心钻孔漏失的问题。2003年至今,根据我院用绳索取心钻进工艺在多个矿区试验及钻进施工中遇到的不同地层、不同漏失方式特点,通过多年生产实践,摸索和总结了绳索取心钻进施工中冲洗液漏失的危害及采用的一些堵漏施工方法。同时也总结了Aus-Plug钻孔堵漏剂在不同漏失情况下比较实用有效的应对堵漏方法,较快推动了我院绳索取心钻进工艺施工的应用和发展。 相似文献
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针对煤矿井下钻孔常规单管取心存在取心率低、效率低下、工人劳动强度大,煤层底板复杂地层以清水为冲洗介质的近水平绳索取心钻进成孔困难等问题,选用适合绳索取心钻进工艺的坑道钻机及配套近水平绳索取心钻具,配合合理的工艺流程进行试验。现场共施工了3个钻孔,成孔2个,孔深分别为151.5、194.5 m;岩心采取率分别为77%、89%,比单管取心提高24%以上;平均日进尺分别为22.7、36.6 m/d,比单管取心效率提高10 m/d以上。通过现场3个取心钻孔的试验,优选出了一套适用于煤矿井下复杂地层以清水为冲洗介质的近水平绳索取心钻探装备与工艺。 相似文献
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我队在某井田采用S75绳索取心钻探技术，大大减轻了工人体力劳动，钻探质量显著提高。但由于地层复杂，钻孔漏水严重，给施工带来极大困难。为了解决钻孔漏失问题，最近两年，我队采用S75绳索取心钻进技术，PHP泥浆，用惰性材料进行堵漏，封堵过4个钻孔7层次，成功率达83.5％，取得了初步效果（见表1）。 相似文献
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绳索取心钻具在坑道勘探中的应用华南地勘局２９１大队楼竹山我队在某矿区坑道勘探中，应用了ＸＵＬ－１００型钻机和直径５６ｍｍ绳索取心（以下简称绳钻）钻探工艺，１９９０年施工６７ｄ，完成钻孔１９个，总进尺１１６６ｍ；１９９２年施工１００ｄ，完成钻孔３３个，... 相似文献
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在陇南紫金李坝金矿钻探施工中遇强水敏性、破碎、复杂地层,普通绳索取心钻具岩心采取率低,平均采取率86.5%,回次进尺少,多在1 m以下,最小回次进尺只有20～30 cm,钻进效率低,平均台班进尺约5 m。通过使用SYZX96型绳索取心液动锤,钻进效率明显提升,平均岩心采取率提高8%,平均回次进尺提高50%,平均台月效率提高17.5%,纯钻时间增加到了60%左右。共完成6个钻孔,进尺2488 m,其中2个钻孔采用SYZX96型绳索取心液动锤,效果明显。总结出适合强水敏性、破碎、复杂地层绳索取心液动锤的使用经验,为类似地层钻探施工提供技术借鉴。 相似文献
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在中国岩金勘查第一深钻ZK96—5钻孔的深部施工中,应用绳索取心液动锤技术在破碎复杂地层中钻进,增加回次进尺,提高时效,延长钻头寿命;在比较完整地层中提高钻速,减少辅助时间,体现了绳索取心液动锤技术的优越性,目前3911．34m的使用深度创造了绳索取心液动锤适应孔深的最新记录。对绳索取心液动锤在深部钻进的优势和易出现的问题进行了分析总结。 相似文献
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我队于一九七五年初就开展绳索取心钻进试验,截至八○年底,共施工135个钻孔,总进尺45000米,并从八○年初起全队全部采用了绳索取心钻进。一九七五~一九七七年主要试用SB56－S型钻具 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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Emmanuel Skourtsos Daniel Vachard Alexandra Zambetakis-Lekkas Rossana Martini Louisette Zaninetti 《Comptes Rendus Geoscience》2002,334(12):925-931
Some olistolites reworked in a Tertiary flysch of Mount Parnon (Peloponnesus, Greece) exhibit a Late Permian assemblage, dominated by Paradunbarula (Shindella) shindensis, Hemigordiopsis cf. luquensis and Colaniella aff. minima. This association corresponds to the Late Wuchiapingian (=Late Dzhulfian), a substage whose algae and foraminifera are generally little known. Contemporaneous limestones crop out in the middle part of the Episkopi Formation in Hydra, but they are rather commonly reworked in Mesozoic and Cainozoic sequences. The palaeobiogeographical affinities shared by the foraminiferal markers of Greece, southeastern Pamir, and southern China, are very strong (up to the specific level), and are congruent with the Pangea B reconstructions. To cite this article: E. Skourtsos et al., C. R. Geoscience 334 (2002) 925–931. 相似文献
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正20141596 Liu Yunhuan(School of Earth Sciences and Resources,Chang’an University,Xi’an 710054,China);Shao Tiequan Early Cambrian Quadrapyrgites Fossils of Xixiang Boita in Southern Shaanxi Province(Journal of Earth Sciences and Environment,ISSN1672-6561,CN61-1423/P,35(3),2013,p.39-43,3 illus.,20 refs.) 相似文献
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正20141719 Chen Zhijun(State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Wuhan 430074,China);Chen Jianguo Automated Batch Mapping Solution for Serial Maps:A Case Study of Exploration Geochemistry Maps(Journal of Geology,ISSN1674-3636,CN32-1796/P,37(3),2013,p.456-464,2 illus.,2 tables,10 refs.) 相似文献
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正20140962 Chen Fenning(Xi’an Institute of Geology and Mineral Resources,Xi’an710054,China);Chen Ruiming Late Miocene-Early Pleistocene Ostracoda Fauna of Gyirong Basin,Southern Tibet(Acta Geologica Sinica,ISSN0001-5717,CN11-1951/P,87(6),2013,p.872-886,6illus.,56refs.) 相似文献
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正1.IGNEOUS PETROLOGY20142008Cai Jinhui(Wuhan Center,China Geological Survey,Wuhan 430205,China);Liu Wei Zircon U-Pb Geochronology and Mineralization Significance of Granodiorites from Fuzichong Pb-Zn Deposit,Guangxi,South China(Geology and Mineral Resources of South China,ISSN1007-3701,CN42-1417/P,29(4),2013,p.271-281,7illus., 相似文献
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正20141205Cheng Weiming(State Key Laboratory of Resources and Environmental Information System,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China);Xia Yao Regional Hazard Assessment of Disaster Environment for Debris Flows:Taking Jundu Mountain,Beijing as an 相似文献
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正20141266Fan Chaoyan(Guangdong Provincial Key Laboratory of Mineral Resources and Geological Processes,Guangzhou 510275,China);Wang Zhenghai On Error Analysis and Correction Method of Measured Strata Section with Wire Projection Method(Journal of 相似文献