唐春安
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- 姓名:唐春安
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学术头衔:
博士生导师, 国家杰出青年科学基金获得者, 教育部“新世纪优秀人才支持计划”入选者
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生物化学
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1000
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成果数
18
【期刊论文】Numerical Simulation of Progressive Rock Failure and Associated Seismicity
唐春安, CHUN'AN TANG †
J. Rock Mech. Min. Sci. Vol. 34, No.2, PP. 249-261, 1997,-0001,():
-1年11月30日
In this paper, a numerical approach to modeling progressive failure leading to collapse in rock and associated seismicity is reported. In the first part, a newly developed numerical code, RFPA2D (Rock Failure Process Analysis), is introduced. The program allows modeling of the observed evolution of damage and associated seismic events due to progressive failure leading to collapse in brittle rock. There are three features distinguishing the approach from conventional numerical methods such as FEM: (1) by introducing heterogeneity of rock parameters into the model, RFPA2D can simulate non-linear behavior in rock using a linear method; (2) by introducing elastic modulus reduction for failed elements, RFPA2D can process discontinuum mechanics problems by a continuum mechanics method; and (3) by recording the event-rate of failed elements, the seismicities associated with the progressive failure in rock can be simulated. In the second part of the paper, the applications of RFPA2D in simulating geological process and in solving mining design problems are illustrated. Numerical simulation of a fault initiation process indicates that some of the important phenomena, such as coalescence of microfracture, the nucleation and growth of crack clusters, fault initiation and development, elastic rebound, dilatation, uplift and seismic behavior, etc. can be simulated with this numerical code. The simulation of progressive failure leading to collapse in underground openings demonstrates the capacity of this code in solving mining design problems.
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唐春安, C.A. Tang a, b, *, X.H. Xu a, S.Q. Kou c, P.-A. Lindqvist c, H.Y. Liu c
International Journal of Rock Mechanics & Mining Sciences 38(2001)1147-1162,-0001,():
-1年11月30日
A numerical approach to particle breakage is applied using the Rock Failure Process Analysis code, RFPA2D. The numerical tool is validated by simulating the Brazilian test with a two-dimensional disk sample. Then two irregularly shaped particles with an exact geometry and exact mechanical properties are numerically modelled to investigate their breakage behaviour under unconfined and confined loading conditions. The numerical results indicate that the dominant mode of failure is catastrophic splitting and progressive crushing, which mainly depends on the loading conditions with respect to confinement. The analysis of the load-displacement curves obtained from the simulations suggests a brittle-ductile transition between the two cases. The lateral constraint increases the initial stiffness and the maximum breakage strength of the particle. Most of the energy released during the failure process comes from the crushing of highly stressed areas, particularly, in the vicinity of the contact points where a crushed zone forms. It is also found that the particle shape governs the breakage strength in addition to the material properties themselves, and that the heterogeneity of the particles governs the fracture propagation paths.
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唐春安, P. K. KAISER †, C. A. TANG‡
Int. J. Rock Mech. Min. Sci. Vol. 35, No.2, pp. 123~134, 1998,-0001,():
-1年11月30日
This paper presents an application of the numerical model presented in the companion paper (Part I) in which, by using a newly developed numerical code, RFPA2D (Rock Failure Process Analysis), a fundamental approach for the simulation of damage initiation and propagation causing seismic energy release during an unstable failure of brittle rock was presented. The in-uence of material and loading system properties including sti
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唐春安, TANG Chun-an , , RUI Yong-qin, LIU Hong-yuan, LIU Jian-xin
煤炭学报,2000,25(5):501~505,-0001,():
-1年11月30日
运用新近开发的岩石破坏过程分析RFPA2D(Rock Failure Process Analysis) 系统,以含瓦斯煤岩的破坏过程分析为例,通过对含瓦斯煤岩突出孕育机制及其声发射的数值模拟,说明了数值模拟方法给含瓦斯煤岩突出机制及其预测理论的发展所带来的新契机。数值模拟再现了含瓦斯煤岩突出的发生、发展过程,模拟结果表明,复杂的瓦斯煤岩断裂、突出现象可能是一些简单机理的演化结果。
瓦斯, 煤岩突出, 非均匀性, 断裂破坏, 数值模拟
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【期刊论文】东北矿区资源开采诱发的工程地质灾害与环境损伤特征*
唐春安, TANG Chun-an
地球科学进展,2004,19(3):490~494,-0001,():
-1年11月30日
以东北老工业基地矿产资源型城市为基础,通过大量的实例和数据介绍了矿产资源开采诱发的工程灾害与环境损伤的内容和特点,并指出矿产资源开采诱发的工程灾害与环境损伤中的几个关键科学问题和所应当采用的分析研究方法。
工程地质灾害, 环境损伤, 资源开采, 东北矿区
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唐春安, C.A. Tang , , T. Xu , T.H. Yang , Z.Z. Liang
Int. J. Rock Mech. Min. Sci. Vol. 41, No.3, CD~ROM,-0001,():
-1年11月30日
Many of the important problems of rock engineering are concerned with mechanical behaviours of rock where the internal rock structure sustains pore pressure and confining pressure from the surrounding rocks. A basic understanding of rock mechanical properties under confining pressure and pore pressure conditions is of great importance in rock mechanics and rock engineering. In this paper, the newly-developed pore-pressure incorporated Rock Failure Process Analysis model (RFPA) is briefly outlined at first. Then a series of numerical tests on rock under different constant confining pressure and pore pressure are conducted to illustrate how the overall macroscopic responses and mechanical properties of brittle heterogeneous rocks under different confining pressure and pore pressure were revealed by RFPA code. In addition, through the modelling of acoustic emission sequences in rock progressive failure, the AE characteristics and the correlation between AE events and stress-strain curves under different confining pressure and pore pressure were also investigated. From the numerically simulated results, it can be possible to analyze large-scale practical rock engineering problems such as mining induced seismicit ies and rock bursts.
Numerical simulation,, confining pressure,, pore pressure,, mechanical behaviours,, acoustic emission,, RFPA.,
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唐春安, C. A. TANG †, P. K. KAISER‡
Int. J. Rock Mech. Min. Sci. Vol. 35, No.2, pp. 113~121, 1998,-0001,():
-1年11月30日
This paper presents a numerical approach for the simulation of damage in-itiation and propagation causing seismic energy release during unstable fail-ure of brittle rock. With a newly developed numerical code, RFPA2D (Rock Failure Process Analysis), the progressive failure process leading to the development of a shear or fault zone, and the eventual collapse of a hetero-geneous rock sample is modeled. Since the constitutive law for each element in the model is elastic
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唐春安, C.A. Tang a, *, W.T. Yang a, Y.F. Fu a, X.H. Xu a
Engineering Geology 49(1998)207-214,-0001,():
-1年11月30日
Numerical modelling as an efficient method is widely employed in various fields of science and engineering. In rockmechanics and geomechanics, considerable progress has been made in numerical simulation on nonlinear and discontinuum problems. However, there is a tendency in this field that the theoretical framework for nonlinear and discontinuum problems becomes more and more complicated and sometimes becomes less practicable. This paper gives a brief introduction to a newly developed numerical code, RFPA2D (rock failure process analysis), which is mathematically a linear and continuum mechanics method for numerically processing nonlinear and discontinuum mechanics problems in rock failure. Although it is simple comparing with other numerical methods for nonlinear and discontinuum problems. It allows one to model the observed evolution of the progressive failure leading to collapse in brittle rocks. An important conclusion from the simulation results is that the microscale heterogeneity is the source of macroscale nonlinearity. Examples showing the potential applications are given in this paper. It can be seen that the RFPA2D has a unique ability to reveal the evolutionary nature of the fracture phenomenon from microfracture scale to global failure, and the great potential exists in modelling mining induced rockbursts and stability of underground openings in greath depth. The capabilities to handle dilation, self-induced faults or even block movement and rotation should also attract applications in the fields of geomechanics as well as rock mechanics.
Numerical method, Modelling, Geological processes, Rock engineering
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唐春安, TANG Chun-an, YANG Tian-hong, LI Lian-cong, LIANG Zheng-zhao, Tham L. G., Lee K. K., Tsui Y.
岩土力学,2004(17):17~20,-0001,():
-1年11月30日
应用岩石破坏过程渗流-应力-损伤(FSD)耦合分析软件F-RFPA2D,通过对孔隙水压作用下岩石试件加载破坏过程的数值模拟,对孔隙水压力大小和梯度对岩石试样中裂纹的萌生和扩展进行了数值模拟研究。模拟结果再现了孔隙水压力作用下裂纹萌生扩展的全过程,表明孔隙水压力大小和梯度对岩石中裂纹的萌生和扩展模式都有很大的影响。
渗流机理, 非均匀性, 孔隙水压, 数值模拟, 破坏过程
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唐春安, TANG Chuntan, ZHU Wancheng, LI Lianchong, LIU Hongyuan
力学与实践,2002,24(5):47~50,-0001,():
-1年11月30日
采用影响系数法对膜一基复合材料的界面剪应力三维半解析进行了分析研究. 利用三维有限元方法对薄膜的影响系数进行了计算. 将基体作为半无限大体,利用其平面边界作用单位力时的位移场解析解,得到基体的影响系数. 结果表明,对膜一基复合材料界面剪应力进行j维半解析计算,克服了完全用三维
材料破坏,, 应力分布,, 光弹图,, 数值模拟
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