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Spatiotemporal model of open-pit based on 3.D deposit model

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中国有色金属学会会刊：英文版 2011年第S3期21卷 616-620页

作者： XIA Chun-lin1, ZHOU Hui1, LI Qing-yuan2, MA Zhen-li3.1. School of geomatics, liaoning technical university, fuxin 123.00,{3. 2. State Key Laboratory for GIS Engineering, Chinese Academy of Surveying and Mapping, Beijing 10083.,{3. 3. Yinchuan College,{3. university of Mining and Technology, Yinchuan 750011,{3. [a] School of geomatics Liaoning Technical University Fuxin 123000 China [b] State Key Laboratory for GIS Engineering Chinese Academy of Surveying and Mapping Beijing 100830 China [c] Yinchuan College China University of Mining and Technology Yinchuan 750011 China

A new method was put forward to make up the three-dimensional deposit model, and the spatiotemporal models of open-pit with temporal dynamics were also studied combined with the corrected models of multilevel ground states so as to bring the three-dimensional open-pit model at different time and its model serial formed from the evolvement into the management of temporal dimension in order to realize the spatial three-dimension and temporal dynamic for the mining management in open-pits,which makes this model easy to query and analyze 3.D information, also help surface mining replaying and stope evolution forecasting. Finally, the time-spatial model was established to show the dynamic mining on some open-pit under the windows XP and VC++ environment.

关键词： 3. model of deposit three-dimensional model mixed model temporal model open-pit

Determination methods and their application in best surveying distance with distance gage

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中国有色金属学会会刊：英文版 2005年第S1期15卷 254-257页

作者： ZHAO Guo-chen (liaoning technical university,{3., china) liaoning Tech Univ Fuxing 123000 Peoples R China

Based on the theory derivation and analysis of practice surveying data, the best surveying distance method and the best surveying distance according to the chosen distance gages are determined. According to the differ... 详细信息

关键词： distance measurement mean square error triangle altitudes surveying distance

Conceptual design,data model and key techniques of“3. Assistant”

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中国有色金属学会会刊：英文版 2011年第S3期21卷 692-698页

作者： LI Qing-yuan1, ZHANG Xuan2, JIN Yang2, ZHOU Hui3. WANG Qian-jin3.WEI Zhan-yin1 1. Key Laboratory of Geo-Informatics, Chinese Academy of Surveying and Mapping, Beijing 10083., china 2. School of Geo-Science and Surveying Engineering, china university of Mining and Technology, Beijing 100083. china 3. School of geomatics, liaoning technical university, fuxin 123.00, china [a] Key Laboratory of Geo-Informatics Chinese Academy of Surveying and Mapping Beijing 100830 China [b] School of Geo-Science and Surveying Engineering China University of Mining and Technology Beijing 100083 China [c] School of geomatics Liaoning Technical University Fuxin 123000 China

Conceptual design, data model and key techniques of "Geo-engineer 3. assistant", an underground 3. GIS oriented to geology and mine application, were discussed. In particular, the importance of high-order smoothing triangular pieces to surface's fine expression in geological modeling was emphasized. The contour mode is the most favorite mode of the three modes about surface expression: DEM, TIN and contour. Topology in underground 3. modeling with CAGD was compared. From the view of boundary and coboundary, which is soul of IS 19107 (Geographic information spatial schema), 3. underground topology was re-examined.

关键词： 3. assistant true 3. GIS fine expression of surface contour mode 3. topology

Numerical simulation of compound media coupling mechanism of deep mining overburden strata

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中国有色金属学会会刊：英文版 2011年第S3期21卷 631-636页

作者： YANG Fan, CHEN Shuang School of Geometrics, liaoning technical university, fuxin 123.00, china School of Geometrics Liaoning Technical University Fuxin 123000 China

Aiming at the regularity of deep mining strata movement, through the application of plate theory and discrete medium theory in establishing the coupling model of the deep mining strata composite medium, the continuum media and the non-continuum media were coupled into the compound media giant system, and the stress of compound layer and strain coupling relationship were established. The accuracy of forecasting surface subsidence in deep mining conditions was improved. The deep mining was simulated through 3.D numerical value by the FLAC3. finite difference software, and the coupling relationship and coupling layer in the strata composite layer were analyzed. The results show that, under the deep mining condition, the coupling zone is in the position of coal seam roof with the thickness of 15-20 times, on which, the stress-strain has much difference on the coupling zone. Considering interlayer effect of coupling zone can improve the prediction precision of surface subsidence.

关键词： deep mining numerical simulation coupling mechanism

Quantitative calculation for the dissipated energy of fault rock burst based on gradient-dependent plasticity

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Journal of university of Science and Technology Beijing 2004年第3期11卷 197-201页

作者： Xuebin Wang Shuhong Dai Long Hai Department of Mechanics and Engineering Sciences, liaoning technical university, fuxin 123.00, china Dept. of Mech. and Eng. Sci. Liaoning Tech. Univ. Fuxin 123000 China

The capacity of energy absorption by fault bands after rock burst wascalculated quantitatively according to shear stress-shear deformation curves considering theinteractions and interplaying among microstructures due to the heterogeneity of strain softeningrock materials. The post-peak stiffness of rock specimens subjected to direct shear was derivedstrictly based on gradient-dependent plasticity, which can not be obtained from the classicalelastoplastic theory. Analytical solutions for the dissipated energy of rock burst were proposedwhether the slope of the post-peak shear stress-shear deformation curve is positive or not. Theanalytical solutions show that shear stress level, confining pressure, shear strength, brittleness,strain rate and heterogeneity of rock materials have important influence on the dissipated *** larger value of the dissipated energy means that the capacity of energy dissipation in the formof shear bands is superior and a lower magnitude of rock burst is expected under the condition ofthe same work done by external shear force. The possibility of rock burst is reduced for a lowersoftening modulus or a larger thickness of shear bands.

关键词： rock burst heterogeneity dissipated energy plastic strain gradient post-peak stiffness characteristic length fault band strain softefiing

A NUMERICAL MODEL OF LAMELLAR SPACING OF Al-Si EUTECTIC

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Acta Metallurgica Sinica(English Letters) 2001年第4期14卷 291-295页

作者： W.Q. Zhang and L. Xiao School of Mechanical Engineering, liaoning technical university, fuxin 123.00, china Sch. of Mech. Eng. Liaoning Technol. Univ. Fuxin 123000 China

A numerical model is established to simulate the concentration field in irregular lamel- lar eutectic of Al-Si system. Both the undercooling and spacing are dependent on the g... 详细信息

A numerical model is established to simulate the concentration field in irregular lamel- lar eutectic of Al-Si system. Both the undercooling and spacing are dependent on the growth rate and the temperature gradient, and increasing growth rate causes an in- crease of undercooling but a decrease of lamellar spacing, while increasing temperature gradient Leads to a decrease of Lamellar spacing. The computed results are in good agreement with experimental observations.

关键词： irregular eutectic Lamellar spacing undercooling growth rate

Volume Change of Heterogeneous Quasi-brittle Materials in Uniaxial Compression

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Journal of Wuhan university of Technology(Materials Science) 2006年第3期21卷 162-167页

作者：王学滨 Department of Mechanics and Engineering Sciences Liaoning Technical University Fuxin 123000China

The volumetric strain was categorized into elastic and plastic parts. The farmer camposed of axial and lateral strains is uniform and determined by Hooke＇s law ; however, the latter consisting of axial and lateral strains is a fuaction af thickness af shear band determined by grndieat-dependeat plasticity by cansidering the heterngeneity of quasi- brittle materials. The non- uniform lateral strain due to the fact that shear band was farmed in the middle of specimen was averaged within specimen to precisely assess the volumetric strain. Then, the analytical expression for volumetric strain was verified by comparison with two earlier experimental results for concrete and rack. Finally, a detailed parametric study was carried out to investigate effects of constitutive parameters （ shear band thickness, elastic and softening rnoduli ） and geometrical size of specimen（ height and width of specimen ） on the volume dilatancy.

关键词： quasi-brittle material heterogeneity volume dilatancy axial compression strain localization non-uniformity of lateral strain shear band thickness

Geochemical characteristics of pyrolysis gas from epimetamorphic rocks in the northern basement of Songliao Basin,Northeast china

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Science china Earth Sciences 2008年第S1期51卷 140-147页

作者： YANG Chun 1 ,LUO Xia 2 ,LI Jian 2 ,LI ZhiSheng 2 ,LIU QuanYou 3.&Wang YuLin 4 1 Department of Earth Sciences,Zhejiang university,Hangzhou 3.0027,china 2 Research Institute of Petroleum Exploration and Development(Langfang Branch),Langfang 065007,china 3.Research Institute of Petroleum Exploration and Development,Beijing 100083.china 4 Department of Source and Environment,liaoning technical university,fuxin 123.00,china Zhejiang Univ Dept Earth Sci Hangzhou 310027 Peoples R China Res Inst Petr Explorat & Dev Langfang Branch Langfang 065007 Peoples R China Res Inst Petr Explorat & Dev Beijing 100083 Peoples R China liaoning Tech Univ Dept Source & Environm Fuxing 123000 Peoples R China

The Xushen gas field,located in the north of Songliao Basin,is a potential giant gas area for china in the *** proved reserves have exceeded 1000×10 8 m 3.by the end of ***,the origin of natural gases from the deep strata is still in *** rocks as a potential gas source are widely spreading in the northern basement of Songliao *** to pyrolysis experiments for these rocks in the semi-confined system,gas production and geochemistry of alkane gases are discussed in this *** Carboniferous-Permian epimetamorphic rocks were heated from 3.0℃to 550℃,with temperature interval of 50℃.The gas production was quantified and measured for chemical and carbon isotopic *** show thatδ13. 1 is less than?20‰,carbon isotope trend of alkane gas isδ13. 1 3. 2 3. 3.orδ13. 1 3. 2 >δ13. 3.,these features suggest that the gas would be coal-type gas at high-over maturity,not be inorganic gas with reversal trend of gaseous alkanes (δ13. 1 >δ13. 2 >δ13. 3.).These characteristics of carbon isotopes are similar with the natural gas from the basin basement,but disagree with gas from the Xingcheng ***,the mixing gases from the pyrolysis gas with coal-typed gases at high-over maturity or oil-typed gases do not cause the reversal trend of carbon *** gas generation intensity for epimetamorphic rocks is 3.0×10 8 ―23.8×10 8 m 3./km 2 ,corresponding to Ro from 2.0%to 3.5%for organic matter.

关键词： Northern Songliao Basin epimetamorphic rock pyrolysis experiment gas generation potential carbon isotope

Comparison of methods to transition geodetic latitude

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中国有色金属学会会刊：英文版 2005年第S1期15卷 234-235页

作者： SHI Jin-feng, LI Gang (liaoning technical university,{3., china) liaoning Tech Univ Fuxing 123000 Peoples R China

With the wide application of GPS technology, the application of the system of space rectangular coordinates is more and more extensive. Transformation of space rectangular coordinates into geodetic coordinates becomes a very popular problem. In order to evaluate various kinds of algorithms existing for solving the problem, three evaluation criteria of the algorithm were put forward at first, that is, precision, calculation speed and algorithm regional suitability. After given some basic formula, three kinds of representative algorithms, classics iteration algorithm, ellipsoidal parameter transformation algorithm and rational polynomials approximation algorithm were introduced. Through a test program made by MATLAB, these three kinds of algorithms were compared. Some helpful conclusions were drawn.

关键词： geodetic latitude numerical method coordinate transition geodetic coordinates rectangular coordinates