共查询到20条相似文献，搜索用时 886 毫秒
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山东省巨野煤田正邦井田地质条件较复杂,主采煤层为石炭纪太原组16煤层,属于薄煤层勘探区.根据区内地震地质条件,采用高分辨地震勘探,了解断层、褶曲、16煤层赋存范围等地质问题,经钻孔验证,获得了较好的地震勘探精度和效果. 相似文献
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山东省巨野煤田正邦井田地质条件较复杂，主采煤层为石炭纪太原组16煤层，属于薄煤层勘探区。根据区内地震地质条件，采用高分辨地震勘探，了解断层、褶曲、16煤层赋存范围等地质问题，经钻孔验证，获得了较好的地震勘探精度和效果。 相似文献
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滕县煤矿区经过几十年的煤炭开发活动,矿山地质环境问题日益突出。为了更好地指导该地区矿山地质环境保护与治理工作,该次调查通过资料收集、地面调查、采样测试等手段,基本查明了区内矿山地质环境现状,采用叠加法对区内矿山地质环境进行了综合评价及治理分区,分为重点区、次重点区和一般重点区,提出加强矿山地质环境监测,减少矸石对方,发展水产养殖和农业种植等合理化建议。 相似文献
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以国产高分辨率卫星影像数据为主要信息源,通过对影像进行数据处理,根据影像特征建立了矿山环境遥感解译标志,并对标志图斑进行了野外验证,结合多时相影像的对比,查明矿山基建、开采过程中造成的地貌景观破坏、土地压占、矿产资源开采情况等,分析矿山开发利用状态和地质环境问题。以遥感技术为基础,并利用GIS平台,结合土地利用现状、土地权证、矿山权证等资料,形成矿山环境监测系统,反映矿山环境的变化趋势和规律,为区域地质环境保护、矿山地质环境治理及矿产资源的管理提供决策依据。 相似文献
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Geometrical feature analysis and disaster assessment of the Xinmo landslide based on remote sensing data 总被引：5，自引：3，他引：2
Jian-rong Fan Xi-yu Zhang Feng-huan Su Yong-gang Ge Paolo Tarolli Zheng-yin Yang Chao Zeng Zhen Zeng 《山地科学学报》2017,14(9):1677-1688
At 5:39 am on June 24, 2017, a landslide occurred in the village of Xinmo in Maoxian County, Aba Tibet and Qiang Autonomous Prefecture(Sichuan Province, Southwest China). On June 25, aerial images were acquired from an unmanned aerial vehicle(UAV), and a digital elevation model(DEM) was processed. Landslide geometrical features were then analyzed. These are the front and rear edge elevation, accumulation area and horizontal sliding distance. Then, the volume and the spatial distribution of the thickness of the deposit were calculated from the difference between the DEM available before the landslide, and the UAV-derived DEM collected after the landslide. Also, the disaster was assessed using high-resolution satellite images acquired before the landslide. These include Quick Bird, Pleiades-1 and GF-2 images with spatial resolutions of 0.65 m, 0.70 m, and 0.80 m, respectively, and the aerial images acquired from the UAV after the landslide with a spatial resolution of 0.1 m. According to the analysis, the area of the landslide was 1.62 km2, and the volume of the landslide was 7.70 ± 1.46 million m3. The average thickness of the landslide accumulation was approximately 8 m. The landslide destroyed a total of 103 buildings. The area of destroyed farmlands was 2.53 ha, and the orchard area was reduced by 28.67 ha. A 2-km section of Songpinggou River was blocked and a 2.1-km section of township road No. 104 was buried. Constrained by the terrain conditions, densely populated and more economically developed areas in the upper reaches of the Minjiang River basin are mainly located in the bottom of the valleys. This is a dangerous area regarding landslide, debris flow and flash flood events Therefore, in mountainous, high-risk disaster areas, it is important to carefully select residential sites to avoid a large number of casualties. 相似文献
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The Cheng-Lan railway links Chengdu, a central city in Southwestern China, and Lanzhou, a central city in Northwestern China. The railway passes through the Longmenshan fault zone (Wenchuan earthquake happened there on May 12, 2008), Minjiang fault zone, and Dongkunlun fault zone, which are all active. It runs over the Yangtze River and the Yellow River, and crosses high mountains and deep valleys. There exists, along the railway’s alignment, different kinds of strata of hard granite and soft, weak metamorphic rocks such as carbonaceous slate, schist, and phyllite. It is, therefore, a key issue for such an infrastructure construction to assess the engineering geological conditions and risks, so as to mitigate or avoid possible georisks and to offer optional designs. Geological survey and georisk assessment along the railway corridor are carried out. Special attention is given to active faults, earthquakes and seismic zones. Based on these, discussions about geological aspects for route selection of the railway are conducted and countermeasures for georisk control are proposed accordingly. Main conclusions are achieved as follows: (1) Geohazards such as landslides, rockfalls and debries flows dominate both the route selection of the railway and the engineering structures (e.g., tunnels or bridges) adopted; (2) Tunnel has been proved to be an excellent structure for linear engineering in geologically active area; and (3) In the case where avoiding is impractical, necessary protection measures should be taken to engineering slopes in high earthquake intensity areas, especially the area with earthquake of Ms. 8 or greater. 相似文献
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为了研究川西凹陷地区中更新统冰水沉积滑坡的变形破坏机制和稳定性, 以G5京昆高速成雅段K1887+350滑坡为例, 通过工程地质勘察和物理力学试验, 运用综合监测技术, 以滑坡的实际变形量为基础, 分析了滑坡变形破坏机制, 研究加固处治前后的滑坡稳定性。结果表明: 不利的地质结构、前缘临空及降水诱发是K1887+350滑坡变形破坏失稳的主要原因, 中更新统冰水沉积层细粒土的膨胀性进一步降低了土体抗剪性质, 地表水长期渗润最终导致冰水沉积物浅表发生蠕动-拉裂变形; 地表裂缝监测是判断山体变形趋势、分析滑坡稳定性的有效途径。 相似文献
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潍坊市位于沂沭断裂带北段东西地堑之间,地质构造复杂,地震活动性强,开展区域地壳稳定性评价对潍坊市城市建设及远景规划具有重要意义。该文通过综合断裂、地震地质、构造应力场、工程地质、水文地质、地质灾害等方面的调查研究资料,以ArcGIS为平台,采用模糊数学评判方法,对潍坊市区域地壳稳定性进行了探讨。研究结果表明,潍坊市以不稳定区为主,面积约8 139.053 km^2,主要分布于沂沭断裂带两侧、端部、转折等部位;其次为稳定区,面积约4 915.455 km^2,主要分布在北部平原区以及南部山区;不稳定区面积2 328.811 km^2,主要分布在鄌郚-葛沟断裂和昌邑-大店断裂间中南部地段;较稳定区面积约1 648.077 km^2,主要分布在西部和东部山区、断裂之间。 相似文献
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巴音铜矿区位于中天山中段的南缘,伊犁地块东南缘,南临南天山缝合带,处在阿吾拉勒山与那拉提山交会处,属那拉提铜、镍、金成矿带,其地质、构造特征比较复杂,成矿地质条件较为有利。通过分析区域成矿背景及矿区地质特征,总结矿床成因及控矿因素,证实该区矿化分为火山-火山热液型、脉岩型和热液脉型3种类型,就成矿机理而言,这3种矿化的形成有着密切的内在联系,在本质上都与该区晚志留世火山活动密切相关。结合区内各种矿化所占的比重和形成时间的先后顺序,其成因类型可概括为:巴音铜矿为以晚志留世海相火山-火山热液型矿化为主,伴有晚期脉岩矿化,局部受海西早期花岗质岩浆热液叠加、改造的中—低温铜矿床。不同类型矿化的主要控矿因素不同,火山岩型矿化的控矿因素主要为火山活动形式、活动阶段及岩性,同时断裂构造也有一定的控制作用;脉岩型矿化系受岩性和脉体本身(出露部位和规模)控制,较好矿化一般出现于脉岩规模较大者中,或脉岩的局部膨大部位;热液脉型矿化主要受角闪花岗岩体及其接触带控制,局部还受到后期断裂破碎带控制,矿体沿断裂破碎带充填而成。 相似文献
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准确评价滑坡-隧道相互作用及稳定性, 采用合理的病害防治方法, 对保障公路顺利完工具有重要意义。以香丽高速公路昌格洛滑坡为例, 利用现场地质调查、钻探等方法查明了滑坡成因机制以及变形特性, 通过数值模拟研究了昌格洛滑坡在天然、降雨和开挖等工况下的空间应力应变特征以及稳定性变化, 研究了隧道与所穿越滑坡之间的相互作用, 据此提出了相应的病害防治方案。结果表明: 昌格洛滑坡在自然条件下处于欠稳定状态; 隧道开挖难以引起滑坡整体失稳, 但会诱发滑坡局部变形, 受滑坡体变形影响, 穿越滑体的隧道部分将产生拉伸-剪切变形; 降雨严重恶化滑坡稳定性, 导致滑坡失稳, 进而使穿越其中的隧道失效破坏。原选线方案面临风险巨大, 最优防治方案为线路东移绕避, 使隧道从滑面以下穿过。研究方法和成果可为香丽高速公路类似病害的防治提供有益借鉴。 相似文献
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A good understanding of giant landslide-prone areas could greatly enhance the understanding of the formation and failure mechanisms of giant landslides.In this study,a classic giant landslide-prone area named the Diexi area located along the upstream stretch of the Minjiang River on the eastern Tibetan Plateau is adopted to analyze the failure mechanism and evolution process by detailed field investigations,Unmanned Aerial Vehicle(UAV)images and a digital surface model(DSM).The results show that among the 37 giant landslides located in the Diexi area,18 landslides are transverse landslides(wedge failure),and the others are consequent landslides(buckling failure).All landslides blocked rivers,and some barrier lakes still remain.The Diexi area features special geological structural conditions related to the hinge section of the Jiaochang arc tectonic belt,the intersection of two active fault zones(the Songpinggou and Minjiang fault zones)and high levels of geostress.The numerous radial fissures induced by the Jiaochang arcuate belt provided lateral sliding boundaries for buckling deformation(consequent landslides)and head scarps for wedge failure(transverse landslides).The rapid incision(1.88 mm/yr)since the middle Pleistocene formed a deep gorge with steep slopes and strong lateral unloading.Frequent earthquakes and rainfall further reduced the rock mass integrity,and strong earthquakes or other factors triggered the landslides. 相似文献
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《山地科学学报》2015,(5)
The goal of this study is to determine the geometrical and geotechnical characteristics of landslides under various geological conditions using detailed field surveys, laboratory soil tests and precipitation records. Three study areas are selected to consider different rocks, including gneiss in Jangheung, granite in Sangju and sedimentary rocks in Pohang, South Korea. Many landslides have occurred in these three areas during the rainy season.Precipitation records indicate that landslides occurring in the gneiss area of Jangheung and granite area of Sangju may be influenced by the hourly rainfall intensity rather than cumulative rainfall.However, landslides occurring in the sedimentary rock area of Pohang may be influenced by hourly rainfall intensity and cumulative rainfall. To investigate the factors that influence these types of landslides, a detailed landslide survey was performed and a series of laboratory soil tests were conducted.According to the detailed field survey, most landslides occurred on the flanks of mountain slopes, and the slope inclination where they occurred mostly ranged from 26 to 30 degrees, regardless of the geological conditions. The landslide in the gneiss area of Jangheung is larger than the landslides in the granite area of Sangju and sedimentary rock area of Pohang.Particularly, the landslide in the sedimentary rock area is shorter and shallower than the landslides in the gneiss and granite areas. Thus, the shape and size of the landslide are clearly related to the geological conditions. According to the integrated soil property and landslide occurrence analyses results, the average dry unit weight of the soils from the landslide sites is smaller than that of the soils obtained from the nonlandslide site. The average coefficient of permeability of soils obtained from the landslide sites is greater than that of soils obtained from the non-landslide sites with the same geology. These results indicate that the soils from the landslide sites are more poorly graded or looser than the soils from the non-landslide sites. 相似文献
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Mian Luqman HUSSAIN Muhammad SHAFIQUE Alam Sher BACHA CHEN Xiao-qing CHEN Hua-yong 《山地科学学报》2021,(3):583-598
China-Pakistan Economic Corridor(CPEC)is a framework of regional connectivity,which will not only benefit China and Pakistan but will have positive impact on Iran,Afghanistan,India,Central Asian Republic,and the region.The surrounding area in CPEC is prone to frequent disruption by geological hazards mainly landslides in northern Pakistan.Comprehensive landslide inventory and susceptibility assessment are rarely available to utilize for landslide mitigation strategies.This study aims to utilize the high-resolution satellite images to develop a comprehensive landslide inventory and subsequently develop landslide susceptibility maps using multiple techniques.The very high-resolution(VHR)satellite images are utilized to develop a landslide inventory using the visual image classification techniques,historic records and field observations.A total of 1632 landslides are mapped in the area.Four statistical models i.e.,frequency ratio,artificial neural network,weights of evidence and logistic regression were used for landslide susceptibility modeling by comparing the landslide inventory with the topographic parameters,geological features,drainage and road network.The developed landslides susceptibility maps were verified using the area under curve(AUC)method.The prediction power of the model was assessed by the prediction rate curve.The success rate curves show 93%,92.8%,92.7%and 87.4%accuracy of susceptibility maps for frequency ratio,artificial neural network,weights of evidence and logistic regression,respectively.The developed landslide inventory and susceptibility maps can be used for land use planning and landslide mitigation strategies. 相似文献
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沂源金星头矿床为矽卡岩型金铁共生的多金属矿床,伴生银、铜和硫。金星头地区主要成矿岩体为燕山晚期沂南序列闪长质杂岩体。一直以来,该区勘查工作主要围绕北部金星头岩体浅部进行,其深部及外围找矿工作程度相对较低。该文在总结金星头地区成矿地质条件基础上,对成矿岩体、矿体、控矿构造、蚀变矿化等矿床地质特征和成矿物质来源进行了分析,结合鲁西部分金矿床的区域成矿地质背景分析类比,对该区成矿潜力和赋矿部位进行探讨:该区以金星头断裂以北为重点找矿区域,围绕金星头岩体,以成矿系统理论为指导,在岩体的西北部及东部、东北部开展深部及外围系统勘查工作,寻找有利控矿构造,综合寻找爆破角砾岩型—岩浆热液型—接触交代型—碳酸盐岩微细浸染型多种矿化类型。同时,进一步查明区内岩体间及其与金星头断裂的空间分布,指导外围及临区深部找矿工作。 相似文献