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1.
《中国地质灾害与防治学报》2019,(1)
<正>龙洞煤矿后山滑坡位于四川省兴文县周家镇龙洞村四组,系2018年12月16日兴文5. 7级地震引发的同震滑坡。滑坡体物质组成主要为第四系残坡积层,滑体后缘宽约40 m,前缘宽约90 m,主滑方向长约450 m,面积约16 000 m~2,平均厚度约15 m,堆积体方量约2×10~5m~3。前缘堆积体堵塞沟道,在降雨工况下易发生局部滑动 相似文献
2.
2017年7月1日,湖南省宁乡市沩山乡祖塔村王家湾组后山发生滑坡,造成9人死亡。滑坡后缘高程400m,前缘高程310m,滑源区斜长180m,最大宽130m,体积约8.04×10~4 m~3,水平滑移距离达300m。滑坡区地处湘中侵蚀剥蚀低山地貌,地形坡度30°～40°,出露地层岩性为震旦系下统金家洞组板状页岩,表层为第四系残坡积碎石土,为一浅层土质顺层滑坡,在降雨和人类活动的共同作用下诱发滑动。研究表明,王家湾滑坡属于牵引式滑坡,具有多级变形破坏特征,经历了临空面形成、第一级变形破坏、第二级变形破坏、第三级变形(潜在破坏)等变形过程。 相似文献
3.
王立朝 《中国地质灾害与防治学报》2018,(4)
正2018年8月6日凌晨,受当地前期连续降雨影响,云南省文山州富宁县阿用乡阿用河右岸一级支流发同河下游河段右岸发生顺层岩质滑坡,堵塞河道形成堰塞湖。滑坡前缘高程721 m,后缘高程871 m,主滑方向219°。滑坡长约200 m、宽约100 m,滑体厚约2～15 m,滑坡总体体积约2.0×105m~3。滑坡形成的堰塞体坝顶长64 m, 相似文献
4.
《中国地质灾害与防治学报》2007,18(3):154-154
滑坡岩体为中生代红层,砂岩及泥岩互层,缓倾顺层。2007年6月中旬以来遭受强降雨,累积达300mm以上,7月7日发生滑动,滑坡长1·5km,宽1·0km,厚10~15m,体积约2000多万m3,受灾村民552户,共2251人。滑坡区分布有古滑坡,后缘为古崩滑堆积体,强降雨期间,由于后缘堆积体滑动加载,导致岩 相似文献
5.
小石盘HP01滑坡位于万州区大周镇五土村6组,处于长江一级支流大周溪右岸岸坡地带。滑坡平面形态呈舌形,坡纵向长约130m,横向宽约230m,平均厚度约12m,体积约35.88×104m3。该滑坡为三峡库区涉水中型土质滑坡,威胁区内居民40余人及相关设施耕地。通过对滑坡勘查、分析的基础上对滑坡的成因机制及稳定性进行了分析,认为该滑坡稳定性受前缘库岸再造及库区水位波动影响最大。 相似文献
6.
清江是长江三峡出口后的第一条较大支流,杨家槽滑坡位于清江左岸,距隔河岩大坝约23km,它是水库库岸重要滑坡体之一,湖北省长阳县鸭子口乡政府所在地,居住人口千余人。滑坡由上下两个滑坡体组成。上滑坡体高程360～570m,面积约0.13km2,体积约300×104m3。形态为:滑坡外围东、西部为山脊地形,北部为斜坡山体,岩层倾向北,倾角30～45°,后缘及两侧弧圈地形明显,平面呈喇叭形。下滑体剪切出口高程130m,面积约0.17km2,体积约410×104m3,滑坡平面呈喇叭形,后部较宽,前部较窄,垂直清江河流。滑体下部坡角30°,中部坡角15°,呈平缓台阶面,上部坡角28… 相似文献
7.
陈家大院子滑坡位于四川省德阳市什邡市,为一"浅层土质牵引式滑坡",滑坡体东西宽145m,南北长156m,坡体前、后缘相对高差121m,上覆第四系覆盖物平均5~6m,滑坡体总方量共计约11.3×104m3,主要滑动方向为140°。滑坡下方居住50户共165人,并建有乡村公路、电力、水利等基础设施,潜在经济损失约500万元。2008年"5.12"地震后滑坡体局部出现变形迹象,滑坡体后缘局部出现张裂缝,是诱发滑坡的直接原因[2]。后经2009年雨季,由于受到人类工程活动及降雨等多方面因素的影响,滑坡变形迹象进一步加剧,滑坡体后缘拉张裂缝形成贯通,坡体前缘局部部分土体发生滑塌,坡体中部部分树木发生倾倒。本文选取了一条滑坡体主剖面,使用极限平衡法对滑坡体在天然、降水、地震等3种不同工况下的稳定性进行了评价,并对该滑坡体的形成机理进行了分析,为滑坡体后期开展治理工作提供了必要的依据。 相似文献
8.
大光包滑坡位于四川省安县高川乡,是汶川Ms 8.0级地震触发的规模最大的巨型滑坡。本文采用震前和震后高分辨率遥感数据源,对大光包滑坡滑动前后进行了4期遥感图像对比解译和分析,结合现场调查和地面测绘,对滑坡分区、滑面形态、剪出口位置及滑坡体体积进行了初步研究。将滑坡划分为滑源区、滑坡洼地区、主滑体堆积区、下游堆积区、上游堆积区和前缘堆积区,其中,主滑坡堆积区基本保持了母岩原有结构形态,其岩层产状与基岩大体一致,未明显解体,出露长1100m,宽490m,平均厚215m,体积达4.64109m3。对比了滑动前后的地形、地貌,以及原矿硐、矿渣、工棚等的位置变化,确定了滑坡边界、滑动方向,滑动距离达1.75km。本文建立了大光包滑坡区1: 5000地面数字高程模型(DEM),获得了滑坡堆积区平面分布面积及最大堆积厚度,采用AutoCAD软件分别建立了大光包滑坡滑动前后及滑面的三维实体模型,计算出大光包滑坡最大纵长约4.3km,横宽约3.5km,最大厚度约550m,体积约为11.52~11.99109m3,不仅是我国,也是全球近百年来发生的规模最大的滑坡之一。 相似文献
9.
安徽省石台县城关同心滑坡调查评价 总被引：1，自引：0，他引：1
安徽省石台县同心滑坡位于县城关秋浦河东岸,县人民政府北侧2km处.滑坡体为志留系高家边组页岩.岩层裂隙节理发育.早在1984年成像的航片上该滑坡体就有显示,目前滑坡体后缘发育多条拉张裂隙.滑坡体处于蠕动-滑动阶段,正在向滑动破坏阶段发展.调查表明,该滑坡体的外形特征主要有主滑方向215°,长1050m、宽81m、厚4m.初步估算滑坡体的体积有3.4万m3,同时该滑坡体南侧约80m处,尚见有一小滑坡体伴生.由于该滑坡体处于极不稳定状态,一旦产生大面积滑动可导致秋浦河截流,对石台县城关同心老街居民造成严重威胁,急需进行勘查和防治工作. 相似文献
10.
殷志强 《中国地质灾害与防治学报》2018,(3)
正2018年4月3日,黄河上游青海省尖扎县康杨镇寺门村发生特大型黄土-泥岩滑坡,造成马康公路、输电线路、饮水管线等严重破坏,直接经济损失约800万元。该滑坡位于黄河南岸凹岸,受黄河侧蚀作用影响强烈。滑体后缘高程2 089 m,前缘高程2 028 m,前后缘相对高差61 m;堆积体长约300 m,宽约500 m,平均厚度约8 m,主滑方向100°;平面形态为规则的圈椅状,剖面形 相似文献
11.
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
12.
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
13.
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
14.
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