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朱溪矿集区横路矿区成矿条件与找矿潜力分析 预览
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作者 魏锦 许杰辉 +8 位作者 王先广 严加永 张雪辉 刘建光 孟德磊 何细荣 饶建锋 蒙智宇 欧阳永棚 《中国地质》 CAS CSCD 北大核心 2019年第4期906-918,共13页
横路矿区位于朱溪矿集区内,其成矿条件与世界最大钨矿床--朱溪矿床类似,目前已发现了多处找矿线索,但前期工作主要聚焦于500 m以浅,亟待探索该区深部找矿前景。本文从矿区地质、地球物理、地球化学、遥感特征及钻探验证等方面综合分析,... 横路矿区位于朱溪矿集区内,其成矿条件与世界最大钨矿床--朱溪矿床类似,目前已发现了多处找矿线索,但前期工作主要聚焦于500 m以浅,亟待探索该区深部找矿前景。本文从矿区地质、地球物理、地球化学、遥感特征及钻探验证等方面综合分析,并与朱溪矿区进行对比,发现二者在成矿地层层位、控岩控矿构造以及岩浆岩所处成岩-成矿事件等重要成矿条件上极为相似。此外,横路矿区的浅表矿化蚀变分布情况与岩脉密切相关,物化探异常及岩脉分布特征显示深部存在隐伏岩体。综合分析认为横路矿区深部找矿潜力巨大,具有找寻破碎带(热液脉)型、矽卡岩型及斑岩型铜钼金多金属矿床的良好前景。 展开更多
关键词 成矿条件 地质、地球物理、地球化学及遥感特征 找矿潜力 横路 朱溪矿集区 深部资源工程
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TrtApplication of advanced water exploration technology in an iron mine roadway 预览
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作者 Shuhan Hu 《探索-地质与矿业研究》 2019年第1期26-27,共2页
TRTAdvanced geological exploration is a relatively advanced Prediction Technology in Mine Roadway Construction.,It has been widely used in mine construction..The hydrogeological conditions of an iron mine are complex.... TRTAdvanced geological exploration is a relatively advanced Prediction Technology in Mine Roadway Construction.,It has been widely used in mine construction..The hydrogeological conditions of an iron mine are complex.,Mine water inflow is larger,Outburst during Roadway Excavation,Water gushing phenomenon is frequent,Poor stability of surrounding rock.To this end,AdoptedTrtCarry out multiple detection experiments with advanced detection technology,For roadway geological advance detection.Combined with drilling engineering verification, TRTAdvanced detection technology can provide reliable advanced Prediction,Provide reliable geological information in time,It provides an important guarantee for the safety of underground roadway excavation. 展开更多
关键词 TRTTechnology GEOLOGICAL Prediction UNDERGROUND ROADWAY ADVANCE water EXPLORATION TOMOGRAPHY
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Sedimentological sequence and depositional evolutionary model of Lower Triassic carbonate rocks in the South Yellow Sea Basin 预览
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作者 Yu-xi Zhang Jian-wen Chen +1 位作者 Jiang-yu Zhou Yong Yuan 《中国地质(英文)》 2019年第3期301-314,共14页
Based on well logging and seismic data, combined with a comparative analysis of drilling data in the Lower Yangtze region, the sequence stratigraphic framework of the Qinglong Formation was established and divided int... Based on well logging and seismic data, combined with a comparative analysis of drilling data in the Lower Yangtze region, the sequence stratigraphic framework of the Qinglong Formation was established and divided into four third-order sequences. Each sequence is mainly composed of the transgress system tract (TST) and the high-stand system tract (HST). According to the lithology, logging curve and seismic reflection structure, the sedimentary filling characteristics and evolution law for the sequence are analyzed. The results show that each sequence is dominated by a half-cycle decline of sea level, and the rise-fall of sea level controls the distribution and evolution of sedimentary systems within the sequence. During the relative sea-level rise, sedimentation rates slow down and muddy sediments are developed. The characteristics of condensing intervals on the flooding surface are very obvious, and continental shelf and open platform deposition are mainly developed. During the relative decline of sea level, the thickness of sediments increased. The main developments were restricted platform and platform shoal environment, and locally developed evaporation platform environment. 展开更多
关键词 Lower TRIASSIC Sequence STRATIGRAPHY SEA-LEVEL change Carbonate rocks Marine GEOLOGICAL survey engineering Yellow Sea China
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Reconstruction of phytoplankton productivity and community structure in the South Yellow Sea 预览
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作者 Xi Mei Ri-hui Li +2 位作者 Xun-hua Zhang Zhong-bo Wang Yong Zhang 《中国地质(英文)》 2019年第3期315-324,共10页
The sedimentary environment and ecological system in the South Yellow Sea (SYS) changed dramatically due to sea level change caused by glacial-interglacial cycles. The authors report the use of marine biomarkers (bras... The sedimentary environment and ecological system in the South Yellow Sea (SYS) changed dramatically due to sea level change caused by glacial-interglacial cycles. The authors report the use of marine biomarkers (brassicasterol, dinosterol and C37 alkenones) and terrigenous biomarkers (C28+C30+C32 nalkanols) in core DLC70-3 from the SYS to reconstruct the variation in the phytoplankton productivity and community structure and possible mechanisms during the middle Pleistocene. The results show that the primary productivity and that of single algae presented a consistent trend for the whole core during the middle Pleistocene, which was high during interglacial periods and low during glacial periods, with the highest being in marine isotope stage (MIS) 5–9 and MIS 19–21. The main reason is that the Yellow Sea Warm Current (YSWC) carried much of high temperature, high salinity water into the SYS, causing upwelling and vertical mixing and stirring, which increased the nutrient supply in the photosynthetic layer. The phytoplankton community structure mainly showed an increase in the relative content of haptophytes in MIS 5–9 and MIS 19–21, while the relative content of diatoms and dinoflagellates decreased;there was no evidence for a haptophyte content in other stages. The results reveal a shift from a coccolitho-phoriddominated community during MIS 5 –9 and MIS 19 –21 to a diatom-dominated community during the other stages, mainly as a result of surface salinity variation, attributed to the invasion of the YSWC during high sea level periods. 展开更多
关键词 Biomarker PHYTOPLANKTON PRODUCTIVITY PHYTOPLANKTON community Ocean WARM current Global climate change Marine GEOLOGICAL survey engineering Yellow Sea China
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Temporal and spatial evolution of surface sediments characteristics in the Dagu River estuary and their dynamic response mechanism 预览
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作者 Xiao-ying Chen Da-hai Liu +3 位作者 Ping Yin Jin-qing Liu Ke Cao Fei Gao 《中国地质(英文)》 2019年第3期325-332,共8页
Based on the 39 surface sediment samples collected in the flood season and the dry season in 2012 respectively and the measured hydrological data in October 2012, the sediment grain size characteristics has been analy... Based on the 39 surface sediment samples collected in the flood season and the dry season in 2012 respectively and the measured hydrological data in October 2012, the sediment grain size characteristics has been analyzed and the response mechanism of surface sediments to estuarine hydrodynamics was revealed by calculating the range of waves and tidal currents. The results show that:(1) The grain size of the surface sediment samples decreased gradually from land to sea in the flood season. The fine sediment was redistributed under marine hydrodynamics in the dry season and the sediments showed coarser tendency ingeneral;(2) tidal current stirring sediment was very obvious in Dagu River estuary area, and wave stirring sediments mainly occurred in the tidal flat area and estuary sand bar area;(3) in the flood season, surface sediment sat the estuary were transported towards south and southeast. In the dry season, surface sediments were transported towards southwest at the north area of Jiaozhou Bay Bridge, and sediments were transported towards northeast area at the south of Jiaozhou Bay Bridge. 展开更多
关键词 Dagu River ESTUARY Surface SEDIMENTS Global climate and environmental change Water dynamics COASTAL zone GEOLOGICAL survey engineering Qingdao Shandong Province China
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Influencing factors and evaluation application of regional crustal stability in the Bohai Strait 预览
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作者 Sai Mei Hong-xian Chu +5 位作者 Ling-yu Dong Zhong-hua Fang Pan-feng Li Fei-fei Zhang Rui Shan Tie-hu Zhao 《中国地质(英文)》 2019年第3期354-363,共10页
Due to the extremely complex geological conditions in the Bohai Strait, active faults is very developed and earthquake activity occurs frequently. It is of great importance to evaluate the regional crustal stability f... Due to the extremely complex geological conditions in the Bohai Strait, active faults is very developed and earthquake activity occurs frequently. It is of great importance to evaluate the regional crustal stability for the planning and construction of the Trans-straits Passage. In this study, the authors carry out the evaluation by means of buffer analysis, topology analysis and overlay analysis based on ArcGIS software. The evaluation mainly analyzed six assessment factors of Bohai Strait including neotectonic activity, active faults distribution, seismicity, tectonic stress fields, Bouguer gravity anomaly and geological disasters. In brief, the crustal stability of the eastern North Yellow Sea Basin is best, while that of the Bohai Basin and southwest Bohai Strait is poor. Meanwhile, small and frequent earthquakes in the southern Strait and geological disasters developed in the northern and central Strait such as tidal ridge and shallow gas which may adversely impact on the Trans-straits Passage construction. 展开更多
关键词 Regional CRUSTAL stability Trans-straits PASSAGE COASTAL GEOLOGICAL survey Engineering GIS Bohai STRAIT China
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A new-type sampler using to collect undisturbed samples of shallow drilling sediment core in the coastal wetland geological surveys 预览
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作者 Guang-ming Zhao Si-yuan Ye +3 位作者 Hong-ming Yuan Shi-xiong Yang Lei He Edward A.Laws 《中国地质(英文)》 2019年第3期398-399,共2页
1. Objective The problems associated with traditional equipment for sampling shallow drilling sediment cores include high production cost, short sample preservation time, inability to store in a freezer, and poor resi... 1. Objective The problems associated with traditional equipment for sampling shallow drilling sediment cores include high production cost, short sample preservation time, inability to store in a freezer, and poor resistance to seawater corrosion (Table 1). We developed a sampler with a new design that overcame these problems. The new design worked well in our study and can efficiently support coastal wetland geological surveys. 展开更多
关键词 SEDIMENT seawater GEOLOGICAL
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Study on Hydrological Engineering Geological Conditions and Anti- leakage Measures 预览
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作者 Yiqiang Yu 《地质研究(英文)》 2019年第1期36-40,共5页
With the continuous development of economy and society, people's ability to transform society has been improved. To break the constraints of hydrological and climatic conditions, some hydrology and water conservan... With the continuous development of economy and society, people's ability to transform society has been improved. To break the constraints of hydrological and climatic conditions, some hydrology and water conservancy projects were constructed to meet the needs of human activities. In the construction of hydrological engineering, geological conditions are first surveyed to determine whether there are significant geological structure problems, in order to enhance the stability of hydrological engineering and reduce the probability of hydrological engineering leakage. 展开更多
关键词 HYDROLOGICAL ENGINEERING GEOLOGICAL conditions ANTI-LEAKAGE measures
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某露天矿边坡滑塌治理方案 预览
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作者 陈斌 杨朝云 +3 位作者 周鹭 漆佳裕 刘桦 涂欣强 《铜业工程》 CAS 2019年第1期97-100,106共5页
针对某露天矿山边坡滑塌现象,通过了解边坡地质条件及现场情况,提出了一种结合主动柔性防护网和普通砂浆锚杆锚固的边坡滑塌治理方案,采用钢丝绳网、普通钢丝格栅等主要材料,通过钢丝绳锚杆和支撑绳的组合稳定坡面,防止边坡岩体进一步... 针对某露天矿山边坡滑塌现象,通过了解边坡地质条件及现场情况,提出了一种结合主动柔性防护网和普通砂浆锚杆锚固的边坡滑塌治理方案,采用钢丝绳网、普通钢丝格栅等主要材料,通过钢丝绳锚杆和支撑绳的组合稳定坡面,防止边坡岩体进一步滑移和坍塌。治理后达到矿山安全生产的要求,滑塌区域边坡面安全稳定。 展开更多
关键词 露天边坡 地质 滑塌治理 主动柔性防护网 锚杆
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Discussion on the Main Points of Construction Quality Control of Geological Hazard Management Engineering 预览
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作者 Jinhua Wang 《地质研究(英文)》 2019年第1期41-45,共5页
In recent years, geological disasters have occurred frequently. This not only has a serious impact on urban construction, but also directly threatens the safety of life and property. In response to this situation, the... In recent years, geological disasters have occurred frequently. This not only has a serious impact on urban construction, but also directly threatens the safety of life and property. In response to this situation, the control of the construction quality of the geological disaster management process must be strengthened to improve the construction quality of the treatment process. This paper mainly introduces the characteristics of geological hazard management engineering, common geological hazards and geological hazard treatment engineering, and expounds the key points and control measures of geological hazard management engineering quality control, so as to improve the construction quality of geological hazard management engineering. 展开更多
关键词 GEOLOGICAL hazards SPECIES COMMON problems CONSTRUCTION control
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The HoekeBrown failure criterion and GSI-2018 edition 预览
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作者 E.Hoek E.T.Brown 《岩石力学与岩土工程学报:英文版》 CSCD 2019年第3期445-463,共19页
The HoekeBrown criterion was introduced in 1980 to provide input for the design of underground excavations in rock.The criterion now incorporates both intact rock and discontinuities,such as joints,characterized by th... The HoekeBrown criterion was introduced in 1980 to provide input for the design of underground excavations in rock.The criterion now incorporates both intact rock and discontinuities,such as joints,characterized by the geological strength index(GSI),into a system designed to estimate the mechanical behaviour of typical rock masses encountered in tunnels,slopes and foundations.The strength and deformation properties of intact rock,derived from laboratory tests,are reduced based on the properties of discontinuities in the rock mass.The nonlinear HoekeBrown criterion for rock masses is widely accepted and has been applied in many projects around the world.While,in general,it has been found to provide satisfactory estimates,there are several questions on the limits of its applicability and on the inaccuracies related to the quality of the input data.This paper introduces relatively few fundamental changes,but it does discuss many of the issues of utilization and presents case histories to demonstrate practical applications of the criterion and the GSI system. 展开更多
关键词 HOEK-BROWN criterion Geological STRENGTH index(GSI) ROCK MASS STRENGTH Uniaxial compressive strength(UCS) Tension cut-off ROCK MASS deformation modulus
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Probabilistic estimate of rock mass static and dynamic demands for underground excavation stabilisation 预览
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作者 Ernesto Villaescusa Alan Thompson Christopher Windsor 《岩石力学与岩土工程学报:英文版》 CSCD 2019年第3期481-493,共13页
Excavation damage under high in situ stress depends largely upon the potential block size associated with any violent ejection.The size and shape of the dynamic instability are largely controlled by the location,orien... Excavation damage under high in situ stress depends largely upon the potential block size associated with any violent ejection.The size and shape of the dynamic instability are largely controlled by the location,orientation and extent of the pre-existing geological discontinuities.A new methodology is presented in which the rock mass demand can be expressed in terms of the mass in tonnes of unstable rock that is ejected per unit area of the excavation surface where failure occurs.A probabilistic approach has been implemented to estimate the potential rock mass instabilities and their associated static and dynamic demands.The new methodology considers that the strain energy released by the rock mass during violent stress-driven failure is largely converted into kinetic energy of ejection for blocks.The estimated dynamic demand has been favourably compared with observations of rock mass damage in a number of underground excavations. 展开更多
关键词 GEOLOGICAL structures PROBABILISTIC design Underground EXCAVATIONS High stresses Dynamic and static DEMANDS Deep mining
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Revisiting rock classification to estimate rock mass properties 预览
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作者 Robert Bertuzzi 《岩石力学与岩土工程学报:英文版》 CSCD 2019年第3期494-510,共17页
This paper presents the results of ongoing research carried out by the author exploring methods to provide a more robust estimate of rock mass properties specifically for use in tunnel design.Data from various large-s... This paper presents the results of ongoing research carried out by the author exploring methods to provide a more robust estimate of rock mass properties specifically for use in tunnel design.Data from various large-scale rock mass failures are introduced,including coal pillars.The damage-initiation,spalling-limit approach is compared to the coal pillar database.New comparisons of estimating the geological strength index(GSI)and relationships to estimate the Hoek-Brown failure criterion parameters,mb,s and a,are presented. 展开更多
关键词 ROCK mass PROPERTIES HoekeBrown STRENGTH criterion Geological STRENGTH index(GSI) TUNNELLING
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Multi-parameter quantitative assessment of 3D geological models for complex fault-block oil reservoirs 预览
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作者 TAN Xuequn LIU Yunyan +3 位作者 ZHOU Xiaozhou LIU JiANDang ZHENG Rongchen JIA Chao 《石油勘探与开发:英文版》 2019年第1期194-204,共11页
In the field of 3 D geologic modeling, researchers often pay more attention to modeling methods and workflows, but neglect the quantitative evaluation of models. If the evaluation is narrowed to the same reservoir typ... In the field of 3 D geologic modeling, researchers often pay more attention to modeling methods and workflows, but neglect the quantitative evaluation of models. If the evaluation is narrowed to the same reservoir type, the comparability and practicality of quantitative assessment will be emerging. The evaluation system should include three parts: data verification, geological understanding and process check. Data verification mainly involves testing the accuracy of local prediction with actual data, and geological understanding is to examine whether the global estimation honors geological principles and prior insights. Process check is also indispensable to avoid occasionality. To this end, we produced a set of assessment criteria, taking complex fault-block sandstone oil reservoir as an example. To be specific, thirteen characteristic parameters were totally selected, setting weights according to their rated importance, formulating three-level evaluation standards in a centesimal system for each characteristic parameter, and obtaining the final assessment based on the cumulative score. The results indicate that such evaluation can not only access the quality of the model objectively and comprehensively, but also identify the aspects in need of improvement through the deduction items. 展开更多
关键词 RESERVOIR characterization GEOLOGICAL modeling quality evaluation characteristic PARAMETER RESERVES estimation faultblock oil RESERVOIR
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Strength of massive to moderately jointed hard rock masses 预览
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作者 R.P.Bewick P.K.Kaiser F.Amann 《岩石力学与岩土工程学报:英文版》 CSCD 2019年第3期562-575,共14页
The Hoek-Brown (HB) failure criterion and the geological strength index (GSI) were developed for the estimation of rock mass strength in jointed and blocky ground where rock mass failure is dominated by sliding along ... The Hoek-Brown (HB) failure criterion and the geological strength index (GSI) were developed for the estimation of rock mass strength in jointed and blocky ground where rock mass failure is dominated by sliding along open joints and rotation of rock blocks. In massive, veined and moderately jointed rock in which rock blocks cannot form without failure of intact rock, the approach to obtain HB parameters must be modified. Typical situations when these modifications are required include the design of pillars, excavation and cavern stability, strainburst potential assessment, and tunnel support in deep underground conditions (around σ1/σci > 0.15, where σ1 is the major principal compressive stress and σci is the unconfined compressive strength of the homogeneous rock) in hard brittle rocks with GSI ≥ 65. In this article, the strength of massive to moderately jointed hard rock masses is investigated, and an approach is presented to estimate the rock mass strength envelope using laboratory data from uniaxial and triaxial compressive strength tests without reliance on the HB-GSI equations. The data from tests on specimens obtained from massive to moderately jointed heterogeneous (veined) rock masses are used to obtain the rock and rock mass strengths at confining stress ranges that are relevant for deep tunnelling and mining;and a methodology is presented for this purpose from laboratory data alone. By directly obtaining the equivalent HB rock mass strength envelope for massive to moderately jointed rock from laboratory tests, the HB-GSI rock mass strength estimation approach is complemented for conditions where the GSIequations are not applicable. Guidance is also provided on how to apply the proposed approach when laboratory test data are not or not yet available. 展开更多
关键词 BRITTLE ROCK Uniaxial compressive strength(UCS) Geological STRENGTH index(GSI) MASSIVE to moderately jointed ROCK MASSES
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The Discovery of ~310 Ma Back-Arc Basin Basalt in the West Junggar,Xinjiang,NW China and its Geological Significance 预览
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作者 ZHI Qian LI Yongjun +2 位作者 YANG Gaoxue DUAN Fenghao TONG Lili 《地质学报:英文版》 SCIE CAS CSCD 2019年第2期496-498,共3页
Objective Mafic magmas can form in different tectonic settings with various geochemical characteristics depending on their mantle sources. Basalts generated in back-arc basins provide valuable perspectives on mantle s... Objective Mafic magmas can form in different tectonic settings with various geochemical characteristics depending on their mantle sources. Basalts generated in back-arc basins provide valuable perspectives on mantle structure and composition, on controls for melt generation, and on the sources responsible for arc magma genesis. 展开更多
关键词 MA BACK-ARC West JUNGGAR XINJIANG GEOLOGICAL Significance
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The response between glacier evolution and eco-geological environment on the Qinghai-Tibet Plateau 预览
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作者 Xi-yong Sun Rui-jiang Zhang +4 位作者 Wei Huang Ang Sun Liang-jun Lin Hong-gen Xu De-cai Jiang 《中国地质(英文)》 2019年第1期1-7,共7页
Based on the remote sensing survey and monitoring results of snow lines on the Qinghai-Tibet Plateau, the authors analyzed the following eco-geological factors such as water resources, permafrost, desertification, wet... Based on the remote sensing survey and monitoring results of snow lines on the Qinghai-Tibet Plateau, the authors analyzed the following eco-geological factors such as water resources, permafrost, desertification, wetlands, lake, geological disasters, sea-level rising, earthquake, etc., affected by the change of snow lines over the past 40 years, and discuss the response between glacier evolution and the eco-geological environment preliminarily. 展开更多
关键词 Qinghai-Tibet Plateau GLACIER EVOLUTION Ecological ENVIRONMENT GEOLOGICAL ENVIRONMENT RESPONSE
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Distribution of potential geological hazards and control factors in Qingdao offshore, China 预览
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作者 Ze Ning Man-man Lin +2 位作者 Yong Zhang Xiao-bo Zhang Xiang-huai Kong 《中国地质(英文)》 2019年第1期40-48,共9页
Engineering construction actively occurs in coastal zones, and these areas have numerous potential geological hazard factors. Since 2009, the development of geological surveys in sea areas has promoted extensive geoph... Engineering construction actively occurs in coastal zones, and these areas have numerous potential geological hazard factors. Since 2009, the development of geological surveys in sea areas has promoted extensive geophysical surveys in Qingdao offshore. In the present study, the types and distribution of potential geological hazard factors were systematically revealed using sub-bottom profile data, side-scan sonar data, and single-channel seismic data, among others. Based on previous research findings, the potential geological hazard factors are classified, and control factors in Qingdao offshore are discussed. The research results show that the primary potential geological hazards include active faults, buried paleo channels, shallow gas, irregular bedrock, eroded gullies, estuary deltas, tidal sand ridges, and seawater intrusion. In addition, neotectonic movement, sea level changes and sedimentary dynamic processes were the main factors that affected the distribution of geological hazards in Qingdao offshore. 展开更多
关键词 SOUTHERN Yellow Sea POTENTIAL GEOLOGICAL hazards BURIED paleo channels SINGLE-CHANNEL seismic Active FAULTS
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Structural mechanism and construction method of mud and water inrush in Xiangyun tunnel of Guangtong-Dali railway 预览
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作者 WANG Yawei 《世界地质:英文版》 2019年第3期167-178,共12页
Mud and water inrush in tunnel is a common problem in the construction process. Nowadays, the research and classification on this are mostly focused on karst situations. According to the characteristics of the surroun... Mud and water inrush in tunnel is a common problem in the construction process. Nowadays, the research and classification on this are mostly focused on karst situations. According to the characteristics of the surrounding rock and damage forms of the tunnel in the studied area, the author analyzed the geological and structural characteristics of mud and water inrush in tunnel and obtained their construction type. Meanwhile, the advanced water detection under the complex geological conditions was studied by using induced polarization method, transient electromagnetic method and three-dimensional seismic method, it can be concluded that the water-rich fracture zone exists within the detection range with a risk of large mud and water inrush disaster. The concrete construction treatment measures are put forward:①cement-water glass binary slurry is selected as the material for ground and hole grouting, its advantage is that the gel time can be controlled, and it has certain grout ability in the strata with large permeability coeffcient, which is conducive to excavate construction immediately after grouting.②applying the mature retrograde grouting construction can reduce grouting time and improve the excavation efficiency. 展开更多
关键词 MUD and water inrush geological model Xiangyun TUNNEL Guangtong-Dali RAILWAY STRUCTURAL mechanism construction method
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浅谈江西省寻乌县大丰多金属铅锌矿区域成矿条件 预览
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作者 狄康康 陈彬 李中民 《世界有色金属》 2019年第5期213-213,215共2页
大丰多金属铅锌矿区位于寻乌县城北东40°方向直线距离约27公里,属寻乌县罗珊乡凤和村行政管辖。矿区地理坐标为东径115°46′49″~115°48′01″,北纬25°07′04″~25°08′09″。
关键词 金属铅锌 成矿条件 区域 地质
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