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researches on detection of 3-d underground cave based on TEM technique

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Researches on detection of 3-D underground cave based on TEM...

中国科学院地质与地球物理研究所第11届（2011年度）学术年会

作者： G.q.xue·y.J.yan·J.l.cheng key laboratory of Mineral resources, institute of geology and geophysics, chinese academy of sciences,beijing 100029,china department of engineering Mechanics,School of Mechanics Civil and.architecture,institute of Vibration engineering, Northwestern polytechnical university,xi’an 710072, people’s republic of china State key laboratory of Coal resources and Safe mining, china university of mining and technology, beijing 100083,china

Because of unreasonable coal mining in china, there are many unknown underground caves,and the inhabited environment of humans is threatened by many geologic hazards,such as cracking of the buildings,ground subsidence,*** make the coal companies aware of the harmfulness of these hazards,it is urgent to determine the reasons for the *** this paper,transient electromagnetic method(TEM) is used to detect the ground resistance caves,instead of the time-consuming and expensive direct drilling *** results of the 3-d synthetic model and real field survey data are given. The results showed that the TEM method can be used to detect a complicated.air-filled underground 3-d cave and coincide with the results of direct drilling survey.

关键词： Transient electromagnetic method Underground cave detection 3-d modeling

regularity of ground rockmass movement induced by backfill mining metal mine

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Regularity of ground rockmass movement induced by backfill m...

中国科学院地质与地球物理研究所第十届(2010年度)学术年会

作者： f.S.Ma,H.J.Zhao,d.M.ding,y.M.Zhang,J.Wang & J.Guo key laboratory of engineering geomechanics,institute of geology and geophysics,china academy of sciences,beijing,pr china

Based on a geological investigation and in-situ stress measurements,this paper describes ground movement and the characteristics of ground fissures as a case study in Jinchuan No.2 *** has been put on the analysis of surface movement induced by underground cut and fill mining using the GpS monitoring *** results showed that ground subsidence occurred.as the mining depth *** present,the largest accumulated subsidence reached 1287.5 mm from 2001 to *** displacement areas,with large curvature in both sides of a depression centre,were exactly the areas in which the two fissure zones are *** data indicates that the large-scale ground movement has not been avoided.absolutely,despite using cement-backfilling ***,ongoing monitoring of ground movement will be particularly useful analyzing deformation mechanisms.

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Modern pollen distributions in qinghai-Tibetan plateau and the development of transfer functions for reconstructing Holocene environmental changes

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Modern pollen distributions in Qinghai-Tibetan Plateau and t...

中国科学院地质与地球物理研究所第11届（2011年度）学术年会

作者： Houyuan lu~(a,*),Naiqin Wu~a,Kam-biu liu~b,liping Zhu~c,xiangdong yang~d,Tandong yao~c,luo Wang~a, quan li~a,xingqi liu~d,Caiming Shen~e,xiaoqiang li~f,Guobang Tong~g,Hui Jiang~h akey laboratory of Cenozoic geology and Environment,institute of geology and geophysics,chinese academy of sciences,beijing 100029,china b department of Oceanography and Coastal sciences,louisiana State university,Baton rouge,lA 70803,USA cinstitute of Tibetan plateau research,chinese academy of sciences,beijing 100085,china d State key laboratory of lake science and Environment,Nanjing institute of limnology and Geography,chinese academy of sciences,Nanjing 210008,china e Atmospheric sciences research Center,State university of New york,Albany,Ny 12203,USA f institute of Vertebrate paleontology and paleoanthropology,chinese academy of sciences,beijing 100044,china g institute of Hydrology and geology,chinese academy of Geological sciences,Zhengding 050803,china h State key laboratory of Estuarine and Coastal research,East china Normal university,Shanghai 200062,china

This study investigates the distribution of modern pollen assemblages in the qjnghai-Tibetan plateau, china,based on surface soil samples collected.at 1202 sites along an altitudinal gradient of 10 -5500 m asl,where mean annual precipitation(MAp) ranges from 12 to 1840 mm and mean annual temperature(MAT) from -1 to 21.5℃.A total of 153 pollen taxa were found with relative abundances greater than 1%in at least two *** correspondence analysis(CCA) was used to determine the main environmental variables influencing pollen *** results reveal that MAp is the most significant dominant ***,MAT,altitude(AlT),July temperature(MT7),and relative humidity(HHH) are also significant variables that clearly follow the gradients in the CCA ordination, suggesting that pollen assemblages probably not only reflect a single climatic parameter,but also a variety of other climatic inter-related parameters. Transfer functions,based on locally weighted weighted.averaging(lWWA),were developed for MAp (r-boot = 0.89,rMSEp = 109 mm),MAT(r-boot = *** = 2.3℃),AlT(r-boot = 0.73, rMSEp = 597 m),HHH(r-boot = 0.82,rMSEp = 4.5%),and July mean precipitation(Mp7)(r- boot = 0.87,rMSEp = 23 ram).Overall,our results confirm that pollen can provide reliable estimates of the primary climatic *** application of the lWWA model to the fossil records of Chen Co lake allowed quantitative inferences to be made about Holocene climatic changes in the southern Tibetan plateau,suggesting that lWWA is a robust calibration method for quantitative palaeo-environ-mental reconstruction based on pollen data in the regions.

关键词： qinghai-Tibetan plateau Vegetation pollen Transfer functions Holocene Climatic changes

Illumination and regolith temperature at china's next candidate lunar landing site Shackleton crater

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science china Earth sciences 2023年第2期66卷 417-429页

作者： Zhen ZHONG Jianguo yAN Huaiyu HE qiling WEN deyun liu Jean-pierre BArrIOT School of physics and Electronic science Guizhou Normal UniversityGuiyang550025China State key laboratory of Information engineering in Surveying Mapping and Remote SensingWuhan UniversityWuhan430079China institute of geology and geophysics Chinese Academy of SciencesBeijing100029China beijing Spacecraft Manufacturing Co. LtdBeijing100094China Observatory Geodetic de Tahiti BP 657098702Faa’aTahitiFrench Polynesia

This study focuses on the illumination and temperature at china’s next lunar candidate landing site Shackleton *** used the NASA’s SpICE system to evaluate the terrain obscuration effect on real-time illumination;the resulting illumination map resembles previous studies,validating the methodologies used in our *** addition,we estimated.an accumulated illumination map for the period of likely rover *** map indicates the illuminated inner wall of the Shackleton crater is close to 27%of the whole,meaning that the rover will likely receive solar rad.ation during its *** the real-time illumination and the distributed 1-d thermal diffusion model,we continuously evaluated the regolith temperature for more than 20 years to stabilize the temperature,and selected the temperature of the end time as the initial value used in a thermal study set for July 20,2023 and May 8,*** results indicate the temperature in the permanent shadow region remains nearly constant,thus validating the stability of our estimated initial *** results also indicate that the surface temperature is more sensitive to transient illumination,but the subsurface temperature is more likely to be associated with the accumulated *** difference indirectly implies that the conductivity of the lunar regolith is *** locations receiving more solar rad.ation show a temperature larger than the threshold(~112 K)of ice *** permanently shadowed regions can be as cold.as 25 K,and such extreme coldness is a hazard to the *** are suitable temperature locations which have a warm surface but cold subsurface to preserve water *** further ensure normal rover movement,we provided.a map of suitable temperature sites and found that these locations exist not only in the Shackleton crater’s inner wall,but also outside the *** suggested four trade-off sampling sites with suitable temperatures and grad.al slopes.

关键词： real-time illumination regolith temperature Shackleton crater Map of landing site

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On the source of the quasi-Carrington rotation periodic magnetic variations on the Martian surface: InSight observations and modeling

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Earth and planetary physics 2022年第3期6卷 275-283页

作者： Hao luo AiMin du ShaoHua Zhang yaSong Ge ying Zhang Shuquan Sun lin Zhao lin Tian Songyan li key laboratory of Earth and planetary physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China College of Earth science University of Chinese Academy of SciencesBeijing 100049China beijing institute of Spacecraft Environment engineering Beijing 100094China

In a recent paper(luo H et al.,2022),we found that the peak amplitudes of diurnal magnetic variations,measured during martian days(sols)at the InSight landing site,exhibited quasi Carrington-rotation(qCr)periods at higher eigenmodes of the natural orthogonal components(NOC);these results were based on~664 sols of magnetic field ***,the source of these periodic variations is still *** this paper we introduce the neutral-wind driven ionospheric dynamo current model(e.g.,lillis et al.,2019)to investigate the *** candidates-the d.aped IMf,electron density/plasma density,the neutral densities,and the electron temperature in the ionosphere with artificial qCr periodicity,are applied in the modeling to find the main factor likely to be causing the observed surface magnetic field variations that exhibit the same qCr *** show that the electron density/plasma density,which controls the total conductivity in the dynamo region,appears to account for the greatest part of the surface qCr variations;its contribution reaches about 67.6%.The d.aped IMf,the neutral densities,and the electron temperature account,respectively,for only about 12.9%,10.3%,and 9.2%of the *** study implies that the qCr magnetic variations on the Martian surface are due primarily to variations of the dynamo currents caused by the electron density *** suggest also that the timevarying fields with the qCr period could be used to probe the Martian interior's electrical conductivity structure to a depth of at least 700 km.

关键词： InSight sol magnetic variations Carrington rotation(Cr)periodicity

云南荒田大型铅锌矿床的成因:流体包裹体和C-H-O-S-pb同位素地球化学约束

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地质学报 2019年第3期93卷 674-700页

作者：刘瑞麟张宝林武广沈晓丽刘军港中国地质科学院矿产资源研究所自然资源部成矿作用与资源评价重点实验室北京100037 北京大学造山带与地壳演化重点实验室北京100871 中国科学院地质与地球物理研究所中国科学院矿产资源研究重点实验室北京100029 中国科学院地球科学研究院北京100029 中国科学院大学北京100049 山东科技大学地球科学与工程学院山东省沉积成矿作用与沉积矿产重点实验室山东青岛266590 核工业北京地质研究院中核集团铀资源勘查与评价技术重点实验室北京100029

荒田铅锌矿位于扬子板块西南缘,与华夏地块和三江地块相接,属峨眉山大火成岩省的南延部分,川-滇-黔铅锌银多金属成矿域的南部。矿体赋存于上二叠统峨眉山玄武岩底部与下二叠统茅口组接触面上及其附近的玄武质-灰质角砾岩层中。本文应用... 详细信息

荒田铅锌矿位于扬子板块西南缘,与华夏地块和三江地块相接,属峨眉山大火成岩省的南延部分,川-滇-黔铅锌银多金属成矿域的南部。矿体赋存于上二叠统峨眉山玄武岩底部与下二叠统茅口组接触面上及其附近的玄武质-灰质角砾岩层中。本文应用流体包裹体和C-H-O-S-pb同位素地球化学研究手段,来探讨荒田铅锌矿的成因。流体包裹体分析表明,成矿流体性质具有阶段性演化特征,早期硫化物阶段(阶段Ⅰ)出现含子矿物包裹体、CO_2包裹体和H_2O包裹体的组合发育特征,均一温度介于245～320℃,平均为270℃;到中期硫化物阶段(阶段Ⅱ)和晚期硫化物阶段(阶段Ⅲ)则逐渐变为以H_2O包裹体为主要类型,均一温度分别介于180～250℃和100～210℃,平均为224℃和174℃。随着成矿作用的进行,成矿流体的均一温度和盐度均表现出从早阶段到晚阶段逐渐降低的趋势。显微激光拉曼光谱分析显示流体包裹体的液相成分主要为H_2O,气相成分为H_2O、CO_2、CH_4以及N_2。碳、氧同位素组成(δ^(13)C_(pdB)值介于-8.54‰～3.76‰,δ^(18)O_(SMOW)值介于8.57‰～24.22‰)在δ^(18)O-δ^(13)C图上分布于原生碳酸岩和海相碳酸盐岩之间,指示CO_2可能来自地幔、海相沉积碳酸盐岩溶解和沉积物中有机质的脱羟基作用。氢氧同位素组成(δd值介于-97.4‰～-71.4‰,δ^(18)O_水值介于-4.6‰～8.0‰)在δd-δ^(18)O图上落在岩浆水和大气降水的过渡带上,推测热液流体运移过程中与顺层下渗的大气降水流体混合,期间可能有海水的加入。矿石硫化物的δ^(34)S值介于-5.5‰～10.3‰,指示矿化剂硫具有多种来源,除了直接来自玄武岩外,还来自古海水硫酸盐和碳酸盐岩地层,硫酸盐通过热化学还原(TSr)过程发生还原作用。矿石硫化物铅的^(208)pb/^(204)pb、^(207)pb/^(204)pb和^(206)pb/^(204)pb比值分别为38.320～39.365、15.603～15.860和18.136～18.786,数据分布呈线性趋势,几乎所有点均落在地壳铅平均演化线以上,且位于峨眉山组玄武岩、碳酸盐岩地层和基底岩石的pb同位素组成范围之内,说明成矿物质具有多源性,铅同位素在成矿之前存在均一化过程。结合成矿物质和成矿流体来源,以及区域成矿地球动力学背景,认为荒田铅锌矿属于密西西比河谷型(MVT)叠加岩浆热液改造型矿床。

关键词：流体包裹体 C-H-O-S-pb同位素成矿流体荒田 MVT型铅锌矿官厅铅锌成矿带

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内蒙古卫境地区铀矿找矿预测

科学技术与工程 2020年第33期20卷 13575-13582页

作者：余长发张元涛核工业北京地质研究院遥感信息与图像分析技术国家级重点实验室北京100029

为研究内蒙古卫境地区构造特征及其与铀矿化的关系,在对高分二号(Gf-2)卫星数据进行大气校正等预处理的基础上,采用目视解译的方法,对卫境地区进行了构造遥感解译。经过野外查证,并结合已有的地质资料,分析了卫境地区构造分布规律。结... 详细信息

为研究内蒙古卫境地区构造特征及其与铀矿化的关系,在对高分二号(Gf-2)卫星数据进行大气校正等预处理的基础上,采用目视解译的方法,对卫境地区进行了构造遥感解译。经过野外查证,并结合已有的地质资料,分析了卫境地区构造分布规律。结果表明:北东-北东东向f 12和北北东向f 11构造与次级近东西向构造、北西向构造等的交汇部位,是卫境地区铀成矿的有利空间。在敖包吐—苏莫查干敖包地区开展了1∶10000γ能谱扫面工作,结果表明:放射性异常主要分布在二叠系大石寨组三段的炭质板岩中,圈定了1处铀矿化异常带以及多处铀矿化异常点,显示该地区具有良好的铀成矿潜力。

关键词：遥感解译 γ能谱扫面铀矿化找矿预测卫境

三山岛金矿西山矿区主要透水中段裂隙分布规律与三维建模

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黄金科学技术 2019年第2期27卷 199-206页

作者：刘港马凤山赵海军郭捷侯成录李威中国科学院地质与地球物理研究所中国科学院页岩气与地质工程重点实验室北京100029 中国科学院地球科学研究院北京100029 中国科学院大学北京100049 山东黄金矿业(莱州)有限公司三山岛金矿山东莱州261442

裂隙作为岩体变形的关键部位及可能的透水通道,严重威胁着矿山尤其是滨海矿山开采的安全。位于山东省莱州市的三山岛金矿西山矿区,地处渤海南岸海滨平原,矿区断裂发育,上覆海水持续威胁着矿山的安全生产。因此,查明裂隙的空间分布情况... 详细信息

裂隙作为岩体变形的关键部位及可能的透水通道,严重威胁着矿山尤其是滨海矿山开采的安全。位于山东省莱州市的三山岛金矿西山矿区,地处渤海南岸海滨平原,矿区断裂发育,上覆海水持续威胁着矿山的安全生产。因此,查明裂隙的空间分布情况是研究矿区岩体稳定性及巷道突涌水的一项极为重要的基础工作。结合三山岛金矿西山矿区多年井下水文与裂隙监测数据,对主要透水巷道的裂隙倾向、倾角和间距等几何参数进行统计分析,绘制了裂隙走向玫瑰花图、倾向倾角极点等密度图以及各参数频率分布直方图,对裂隙参数进行了分布规律拟合,并通过MATlAB编程完成了各巷道围岩离散裂隙网络的三维几何建模,能够直观、动态地展示出裂隙的分布情况。结果表明:三山岛金矿西山矿区主要透水中段有-375,-510,-600 m中段,各中段按倾向皆可分成2～3个裂隙组,以NW向和SE向居多,倾角均较大。每组裂隙的倾向、倾角和间距等几何参数可近似认为服从对数正态分布、正态分布或负指数分布,为离散裂隙的定量化提供了可能。根据参数分布规律生成的三维裂隙网络模型能够较好地反映裂隙的几何特征。通过与矿区3条断裂带的对比,得出3组裂隙中属于张扭性断层f3断裂带的裂隙组的渗透能力较其他2组(f1、f2断裂带)强,可为考虑离散裂隙的巷道围岩稳定性分析、采矿过程中裂隙渗透性变化及突涌水通道的判别提供重要参考。

关键词：滨海矿山裂隙统计主要透水中段裂隙分布规律三维建模

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基于三维地震探测的海底矿区地质结构分析

黄金科学技术 2019年第4期27卷 530-538页

作者：李威马凤山卢湘鹏曹家源郭捷山东黄金矿业(莱州)有限公司三山岛金矿山东莱州261442 中国科学院地质与地球物理研究所中国科学院页岩气与地质工程重点实验室北京100029 中石化石油工程地球物理有限公司胜利分公司山东东营257086

三山岛金矿新立矿区是我国唯一一座海底金属矿山,其对开采技术要求较高,大规模海底开采过程中潜存的安全问题是矿山需解决的首要问题。其中,海底第四系底部黏土隔水层和f1断层泥是阻水的关键部位,这2处隔水层破坏后有可能会造成海水溃入... 详细信息

三山岛金矿新立矿区是我国唯一一座海底金属矿山,其对开采技术要求较高,大规模海底开采过程中潜存的安全问题是矿山需解决的首要问题。其中,海底第四系底部黏土隔水层和f1断层泥是阻水的关键部位,这2处隔水层破坏后有可能会造成海水溃入,因此需要探明矿区上覆岩层的地质结构,尤其是黏土隔水层分布情况。经过探索形成了高精度三维地震勘探技术,包括灵活的采集几何,低噪声接收器条件和定量控制等,并在开展新立矿区海底地震勘探中取得了很好的效果。研究表明:在矿区地质勘查中,三维地震勘探方法可在较大深度范围内精细探测浅层与深部的地质结构形态,是一种有效且实用的技术方法;第四系在探测区稳定分布,埋深在8~39m之间,主要表现为西部和北部偏薄,南东方向地层逐渐变深,其中第四系底部的黏土隔水层厚度变化范围为1~11m,分布趋势与第四系基本一致,但在f1断裂附近明显变薄,厚度为2.5~5.0m,并向北西方向逐渐变薄,隔水稳定性变差,对矿床开采具有一定的风险;下覆基岩强、中、弱3层风化带总的厚度变化范围为3~35m,在f1断裂附近风化带明显变厚,厚度为20~35m,是矿区主要的透水结构。高精度三维地震技术首次应用于新立矿区的地质结构探测中,为三山岛金矿海底矿区的安全开采设计提供了数据支持。

关键词：三山岛金矿海底矿区海水溃入三维地震勘探地质结构分析