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3D visualization model and key techniques for digital mine

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中国有色金属学会会刊：英文版 2011年第S3期21卷 748-752页

作者： JIN Bao-xuan1.FANG Yuan-min2,SONG Wei-wei2 1. Yunnan Provincial Geomatics Centre, Kunming 650034, China 2. Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China [a] Yunnan Provincial Geomatics Centre Kunming 650034 China [b] Faculty of Land Resource Engineering Kunming University of Science and Technology Kunming 650093 China

Digital mine is the inevitable outcome of the information processing, and is also a complicated system engineering. Firstly, for the 3D visualization application of the digital mine, the ground and underground integrative visualization framework model was proposed based on the mine entity database. So, the visualization problem was availably resolved, as well as the professional analytical ability was improved. Secondly, aiming at the irregularities, non-uniformity, dynamics of mine entities, mix modeling method based on the entity character was put forward, in which 3D expression of mine entities was realized. Lastly, the 3D visualization project for a copper mine was experimentally studied. Satisfactory results were acquired, and the rationality of visualization model and feasibility of 3D modeling were validated.

关键词： digital mine three dimension visualization framework model spatial data modeling

Sorption behavior of U(VI), ^(234)U(VI) and ^(238)U(VI) onto fracture-filling clays in Beishan granite, Gansu: Application to selecting the site of high-level radwaste repository in China

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Science China Earth Sciences 2005年第10期48卷 1649-1655页

作者： MIN Maozhong1.2, LUO Xingzhang3, WANG Ju4, JIN Yuanxin4 & WANG Rucheng1.1. Department of Earth Sciences, State key Laboratory of Mineral Deposit Research, Nanjing University, Nanjing 21.093, China 2. Center of Materials Analysis, Nanjing University, Nanjing 21.093, China 3. Department of Environmental Science and Engineering, Nanjing University, Nanjing 21.093, China 4. Beijing Geology Institute, Nuclear Industry, Beijing 1.0029, China Department of Earth Sciences State Key Laboratory of Mineral Deposit Research Nanjing University Nanjing China Center of Materials Analysis Nanjing University Nanjing China Department of Environmental Science and Engineering Nanjing University Nanjing China Beijing Geology Institute Nuclear Industry Beijing China

The first results of sorption experiments of U(VI), 234U(VI) and 238U(VI) onto original (unpurified) fracture-filling clays from No.1.monzonitic granite intrusion, Beishan area, Gansu Province, China are reported. The monzonitic granite intrusion is a potential location for a high-level radwaste (HLW) repository in China. The present experimental results show that the maximum U(VI) sorption reached 92% at near-neutral pH and the distribution coefficient (Kd) was 1.26 mL/g. A high sorption capacity of the fracture-filling clays in host rock on radioactive ele-ments is necessary for HLW deep geological disposal repository. No preferential sorption of 234U onto the clays was found. Finally, the sorption of U(VI) onto the clays was also modeled using a surface complexation model.

关键词： HLW geological disposal repository, granite, uranium, radionuclide, clay, sorption.

PIXE and INAA studies on ancient potteries from Guangfulin relics in Shanghai

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Progress in Natural Science:Materials International 2007年第11期17卷 1348-1356页

作者： Lin Jiawei1. Cheng Huansheng1. Zhang Zhengquan1. Zhang Bin1. Feng Songlin2, Song Jian3, Gao Menghe4 and Zhu Dan1.1. Applied Ion Beam Physics Laboratory, key Laboratory of the Ministry of Education, Institute of Modern Physics, Fudan University, Shanghai 200433, China 2. key Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, Beijing 1.0039, China 3. Shanghai Museum, Shanghai 200003, China 4. Department of Cultural Heritage and Museology, Fudan University, Shanghai 200433, China) Applied Ion Beam Physics Laboratory Key Laboratory of the Ministry of Education Institute of Modern Physics Fudan University Shanghai 200433 China key Laboratory of Nuclear Analytical Techniques Institute of High Energy Physics Beijing 100039 China Shanghai Museum Shanghai 200003 China Department of Cultural Heritage and Museology Fudan University Shanghai 200433 China

This paper reports the study of ancient potteries unearthed from the Guangfulin site in Shanghai. From the external features of these potteries, archeologists can classify them into two different cultural types: Liangzhu culture (local culture) and a new culture which might be derived elsewhere, but they can not recognize whether they were produced in the same place. Proton induced X-ray emission (PIXE) and instrumental neutron activation analysis (INAA) were used to measure the chemical compositions of the samples and the results were analyzed using multivariate statistics. We found that the two methods can complement each other and their database can be mutually referenced in the study of ancient potteries. Experimental results show that the compositions of the potteries from the two cultural types are different, which means that the materials for ancient potteries of new culture originate from elsewhere. This supports the archaeologists’ speculation that a group of ancient people migrated to Shanghai from some other places 4000 years ago.

关键词： PIXE INAA factor analysis Guangfulin ancient pottery

Ground state and polaron and bipolaron excited states in polydiacetylene

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Science China(Physics,Mechanics & Astronomy) 2006年第4期49卷 430-439页

作者： LI Yuan1. HU Guichao1. XIA Caijuan1. LIU Desheng1.2 & XIE Shijie1.2 1. School of Physics and Microelectronics, Shandong University, Jinan 2501.0, China 2. National key Laboratory of Crystal Materials, Shandong University, Jinan 2501.0, China 1. School of Physics and Microelectronics Shandong University Jinan 250100 China 2. National key Laboratory of Crystal Materials Shandong University Jinan 250100 China

The electronic properties of ground state and charged excited states of nondegenerate polydiacetylene were investigated by means of a tight-binding model. The parameters of the model were obtained by comparison of the experimental and other theoretical results. It was found that there is a stable dimerized structure of polydiacetylene in ground state and the doping induces the nonlinear excitations, such as polarons and bipolarons. In order to compare the stability of polaron and bipolaron, the creation energy and binding energy were separately defined. By neglecting the electron-electron Coulomb interaction, a bipolaron is more stable than two independent polarons.

关键词： dimerization, polaron, bipolaron, binding energy.

Estimation methods of eco-environmental water requirements: Case study

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Science China Earth Sciences 2005年第8期48卷 1280-1292页

作者： YANG Zhifeng1.2, CUI Baoshan1.& LIU Jingling 1. School of Environment, Beijing Normal University, Beijing 1.0875, China 2. State key Joint Laboratory of Environmental Simulation and Pollution Control, Beijing 1.0875, China 1. School of Environment Beijing Normal University 100875 Beijing China 2. State key Joint Laboratory of Environmental Simulation and Pollution Control 100875 Beijing China

Supplying water to the ecological environment with certain quantity and quality is significant for the protection of diversity and the realization of sustainable development. The conception and connotation of eco-environmental water requirements, including the definition of the conception, the composition and characteristics of eco-environmental water requirements, are evaluated in this paper. The classification and estimation methods of eco-environmental water requirements are then proposed. On the basis of the study on the Huang-Huai-Hai Area, the present water use, the minimum and suitable water requirement are estimated and the cor-responding water shortage is also calculated. According to the interrelated programs, the eco-environmental water requirements in the coming years (201., 2030, 2050) are estimated. The result indicates that the minimum and suitable eco-environmental water requirements fluc-tuate with the differences of function setting and the referential standard of water resources, and so as the water shortage. Moreover, the study indicates that the minimum eco-environmental water requirement of the study area ranges from 2.84×1.1.m3 to 1.02×1.1.m3, the suitable water requirement ranges from 6.45×1.1.m3 to 1.78×1.1.m3, the water shortage ranges from 9.1.1.9m3 to 2.1.×1.1.m3 under the minimum water requirement, and it is from 3.07×1.1.m3 to 7.53×1.1.m3 under the suitable water requirement. According to the different values of the water shortage, the water priority can be allocated. The ranges of the eco-environmental water re-quirements in the three coming years (201., 2030, 2050) are 4.49×1.1.m3?1.73×1.1.m3, 5.99×1.m3?2.09×1.1.m3, and 7.44×1.1.m3?2.52×1.1.m3, respectively.

关键词： eco-environmental water requirements, assessment methods, Huang-Huai-Hai area.

Numerical simulation of air-water two-phase flow over stepped spillways

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Science China(Technological Sciences) 2006年第6期49卷 674-684页

作者： CHENG Xiangju1. CHEN Yongcan1.& LUO Lin2 1. Department of Hydraulic Engineering, Tsinghua University, Beijing 1.0084, China 2. State key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 61.065, China Department of Hydraulic Engineering Tsinghua University Beijing 100084 China State key Laboratory of Hydraulics Mountain River Engineering Sichuan University Chengdu 610065 China

Stepped spillways for significant energy dissipation along the chute have gained interest; popularity among researchers; dam engineers. Due to the complexity of air-water two-phase flow over stepped spillways, the finite volume computational fluid dynamics module of the FLUENT software was used to simulate the main characteristics of the flow. Adopting the RNG k- turbulence model, the mixture flow model for air-water two-phase flow was used to simulate the flow field over stepped spillway with the PISO arithmetic technique. The numerical result successfully reproduced the complex flow over a stepped spillway of an experiment case, including the interaction between entrained air bubbles; cavity recirculation in the skimming flow regime, velocity distribution; the pressure profiles on the step surface as well. The result is helpful for understanding the detailed information about energy dissipation over stepped spillways.

关键词： stepped spillway, mixture model, RNG k-εmodel, air-water two-phase flow.

Abnormal high pressure in Kuqa foreland thrust belt of Tarim basin: Origin and impacts on hydrocarbon accumulation

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Progress in Natural Science:Materials International 2006年第12期16卷 1307-1314页

作者： ZENG Lianbo~1.* and LIU Benming~ 1.2 (1. key Laboratory of Hydrocarbon Accumulation in China Petroleum University, Ministry of Education, Beijing 1.2249, China 2. The Institute of Oil and Gas Exploration and Development, Tarim Oilfield Company, PetroChina Company Limited, Korla 841.00, China) [a]Ministry of Education Key Laboratory of Hydrocarbon Accumulation in China Petroleum University Beijing China [b]The Institute of Oil and Gas Exploration and Development Tarim Oilfield Company PetroChina Company Limited Korla China

Following analyses of the abnormal high pressure distribution characteristics, based on the geological characteristics, tectonic stress field and physical simulation, we investigated the formation mechanisms of abnormal high pressure and its impacts on hydrocarbon accumulation in the Kuqa foreland thrust belt. The abnormal high pressure appears at the bottom of the Paleogene and obviously exists in the Triassic and Jurassic. However, the pressure coefficient in the Triassic and Jurassic is lower than that in the Cretaceous and at the bottom of the Paleogene. Horizontally, the abnormal high pressure distribution is characterized by E-W orientation zoning. The maximum pressure coefficient lies in the Kelasu-Dongqiu-Dina tectonic zones in the center of the Kuqa foreland thrust belt and decreases away from the tectonic zones. The formation of abnormal high pressure was mainly related with the intense tectonic compression in the Early Pleistocene time, and tectonic uplifting, undercompaction and hydrocarbon generation were secondary factors contributing to abnormal high pressure. Under the rapid and intense tectonic compression in the Early Pleistocene, the rock framework firstly undertook 1.4 of the compression stress and the other was borne by the pore fluids. Due to the presence of great seal of gypsum-salt or gypsum-mudstone beds in the Paleogene, the pressure of pore fluids increased rapidly and led to the abnormal high pressure in the Kuqa foreland thrust belt. The abnormal high pressure has important impacts on hydrocarbon accumulation. It is one of the necessary conditions for formation of large oil and gas fields in the Kuqa foreland thrust belt.

关键词： abnormal high pressure formation mechanism oil and gas reservoir Kuqa foreland thrust belt Tarim basin.

Numerical simulation of the influences of sinker weight on the deformation and load of net of gravity sea cage in uniform flow

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Acta Oceanologica Sinica 2006年第3期25卷 125-137页

作者： LI Yucheng 1.2* , ZHAO Yunpeng 1., GUI Fukun 1., TENG Bin 1., DONG Guohai 1.1. State key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 1.6024, China 2. R&D Center of Civil Engineering Technology, Dalian University, Dalian 1.6622, China State key Laboratory of Coastal and Offshore Engineering Dalian University of Technology Dalian 116024 China

A numerical model for determining fishing net configuration and load is developed, based on the lumped masses method. The model is used to analyze the influences on the net of gravity sea cage by different sinker weights in uniform flow. The net of gravity sea cage is simulated under different current velocities and sinker weights. In order to verify the validity of the numerical results, model test results made by Lader and Enerhaug are cited and compared with the numerical ones. The results of numerical simulation agree well with the experimental ones and the agreement is within an error range of 1.% under different velocities and sinker weights. The numerical results indicate that increasing the sinker weight can effectively reduce the net deformation, but the total drag force on the net will increase accordingly. Results will give references for better knowledge of the hydrodynamic behavior of gravity sea cage.

关键词： sea cage numerical simulation lumped mass method sinker weight

Kinematics and dynamics of the Mesozoic orogeny and late-orogenic extensional collapse in the Sino-Mongolian border areas

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Science China Earth Sciences 2005年第7期48卷 849-862页

作者： ZHENG Yadong 1.& WANG Tao2 1. key Laboratory of Orogenic Belts and Crustal Evolution (Peking University), Ministry of Education, Beijing 1.0871. China 2. Institute of Geology, Chinese Academy of Geological Sciences, Beijing 1.0037, China key Laboratory of Orogenic Belts and Crustal Evolution (Peking University) Ministry of Education Beijing 100871 China Institute of Geology Chinese Academy of Geological Sciences Beijinq 100037 China

The Sino-Mongolian border areas underwent two important tectonic events during Mesozoic time after late Paleozoic orogeny: a late Triassic to earlier Jurassic contractional event that resulted in a large-scale south-vergent thrust during the orogeny and a late Jurassic-earlier Cretaceous extensional event in a north-south direction that formed a metamorphic core complex. The kinematic and dynamic analyses show that the thrust sheet moved southwards with a kinematic vorticity number of ca. -0.1. and sub-horizontal maximum compressive stress axis that belongs to a contraction-thickening shear. The upper plate of the late-orogenic detachment relatively moved in a 1.5°direction. The average kinematic vorticity in its earlier stage was 0.74 that belongs to simple shear dominated shearing and related to the maximum compressive stress axes dipping at ～66°, while the later average kinematic vorticity was ～0.55°that belongs to pure shear dominated shearing with sub-vertical maximum compressive stress axes. This suggests that the thrusting led to the crust thickened and the lower plate rocks that were originally located in the upper crust depressed through a brittle-ductile transition zone into the lower crust and became warmer. The heated rocks trended to uplift since their increasing volume and decreasing density while the loading of the upper-plate rocks increased due to the structural thickening. Under the combined effect of the loading and the thermal-uplifting, the ductile shear zone in between increased in its component of vertical pure shear. Once its pure-shear component exceeded its simple-shear one the ductile shear zone became an extension-thinned shear zone. This progressive transitional process reflects internal and essential temporal and spatial relationships: the extensional factor nucleated during the crust thickening by thrusting and increase of the extensional factor finally led to late-orogenic collapse.

关键词： Mesozoic thrusting,late-orogenic collapse,kinematic vorticity number,stress state.