Itasca 2024会议论文概述与总结

摘要

第6届Itasca应用数值模拟研讨会共提交61篇论文，涵盖岩土工程及数值模拟技术的多个领域。虽然Itasca软件因技术门槛较高导致外部论文较少，但论文内容多样，涉及地下开挖、本构模型、边坡稳定性、机器学习等研究。使用软件包括FLAC3D、PFC3D等，研究成果展现了岩土工程和数值模拟技术的广泛应用和发展趋势，有助于推动相关领域的技术进步。

正文

1. 引言

按照Itasca官方公布的数据，即将举行的第6届Itasca应用数值模拟研讨会【Itasca采矿分析工具箱IMAT的安装；2024年Cundall奖获奖的3篇论文 (Itasca)】共提交了大约61篇论文，除去Itasca员工提交的论文，外部提交的论文仅50篇左右，这个数量确实有点儿少，主要原因是与其它同类软件相比，使用Itasca软件的技术门槛较高，较少用于普通的岩土咨询公司和小型项目。

(1) Dams【堤坝地震变形(Seismic Deformations of Tail ings Dam)的分析指南】

(2) Masonry【Cording E.J. : 2020年太沙基讲座 (TL56): 地下结构设计和性能分析】

(3) Tunneling【软土地下施工的岩土工程问题(Underground Construction in Soft Ground)】

(4) Nuclear Waste【CouFrac 2022---断裂地质介质的耦合过程(Coupling in Fractured Media)】

(5) Slope Stability【通过Euclidean距离计算向量值来对句子相似度排序】

(6) Damage Mechanics【IACMAG 2022 | 计算机方法和地质力学进展】

(7) Machine Learning【视频 | 机器学习和人工智能时代的岩土工程】

(8) Material Behavior【2025年太沙基讲座获得者---牛津大学 Dr. Sarah Springman】

(9) Underground Mining【地下金属矿顶柱稳定性分析(Crown Pillar Stability Analysis)】

(10) Constitutive Models【本构模型(Constitutive Models)选择】

(11) Hydraulic Fracturing【水力压裂技术在崩落采矿中的最新应用(Hydraulic Fracturing)】

(12) Rockfall/ Debris Flow【泸定6.8级地震诱发的边坡失稳回顾】

(13) Dynamic / SeismicAnalysis【地震载荷作用下的边坡稳定性分析(Seismic Loading)】

(14) Caverns and Large Excavations【ChatGPT---学术文献引用的反向校准】

(15) Numerical Techniques / Methods【IACMAG 2022 | 计算机方法和地质力学进展】

(16) Soil/Rock Structure Interaction【第62届 | 朗金讲座 (Rankine Lecture 1961-2024)】

(17) Coupled and Time-Dependent Processes【3DEC流体-力耦合分析(Coupled hydro-mechanical analysis)】

2. 主要内容总结

这61篇论文涵盖了广泛的岩土工程和数值模拟技术，特别是在地下开挖、岩土工程本构模型、耦合过程、边坡稳定性、机器学习应用等方面的研究和应用。最主要的内容总结如下：

(1) 地下开挖和岩土工程：包括对地下洞穴、隧道、矿井等的数值模拟和稳定性分析。例如，SNOWY 2.0发电站综合体的地下开挖数值模拟、岩盐洞穴周围岩石在低偏应力下的蠕变评估、以及地下矿井中应变突发倾向开挖的动态加固策略。

(2) 本构模型：比较了不同的本构模型，如P2PSand和NorSand，用于尾矿坝静态液化评估，还介绍了FLAC3D中新提出的膨胀本构模型。

(3) 耦合和时间依赖过程：涉及气体生成率对废料力学行为的影响、热压缩的数值研究、以及粘土基础剪应力的估算等。

(4) 岩石和材料行为：研究了岩石在不同条件下的微观破裂过程、火灾后环境中的热力学行为、以及粒子在直剪测试中缩放和剪切应力均匀性的问题。

(5) 隧道和矿井工程：包括对多种矿井和隧道稳定性的数值模拟，例如，通过3DEC和FLAC3D评估地下开挖中临时支护措施的参与、以及对矿井中地压和地应力的评估。

(6) 数值技术/方法：详细介绍了多种数值模拟技术和方法，如基于PFC3D的水力-力学耦合方法、使用现场数据和机器学习改进数值模型参数化、以及使用FLAC3D模拟裂缝注入等。

(7) 边坡稳定性和滑坡分析：通过FLAC3D和PFC3D模型模拟边坡失稳的全过程，特别是对McArthur River矿区的三维边坡稳定性分析。

(8) 核废料管理：主要讨论在COx黏土岩中开挖隧道的时间依赖性模拟。

(9) 机器学习应用：使用Itasca软件训练机器学习替代模型、实时三维边坡稳定性分析的替代模型等。

(10) 地震和动态分析：采用FLAC3D进行地震性能评估、铁路高铁关键速度的数值模拟等。

3. 使用的软件和技术

(1) FLAC3D (Fast Lagrangian Analysis of Continua in 3 Dimensions)：用于地下开挖数值模拟、岩盐洞穴蠕变评估、膨胀本构模型、剪应力估算、热压缩数值研究等。还用于模型裂缝注入、临时支护措施评估、以及多种地震和动态分析。

(2) PFC3D (Particle Flow Code in 3 Dimensions)：用于水力-力学耦合方法、粒子在直剪测试中的缩放和剪切应力均匀性评估以及用于模拟边坡失稳过程。

(3) UDEC (Universal Distinct Element Code)：用于分析花岗岩的宏观行为和微裂纹。

(4) 3DEC (3 Dimensional Distinct Element Code)：用于评估地下开挖中临时支护措施的参与。

(5) T2LBM (Two-Phase Lattice Boltzmann Method)：与FLAC3D耦合框架一起用于评估气体生成率对废料力学行为的影响。

(6) Griddle：用于准备数值模型，特别是大型地下矿井中相交地质结构的建模。

(7) DFN (Discrete Fracture Network)：与DEM结合用于识别矿井长壁面板上方的裂缝网络。

4. 会议论文题目

1. New swelling constitutive model in FLAC3D

2. MPAC - Material Point Analysis of Continua

3. Explicit modeling of friction rock stabilizers

4. Conditioning discrete fracture networks to field data

5. Maxwell damping in FLAC3D: Verification and validation

6. Assessment of floor heave behavior in soft floor strata

7. 3D modeling of destress excavations at two case study mines

8. Seismic performance assessment of dams on tailings foundation

9. Using Itasca Software to train machine learning surrogate models

10. Defining a seismic response index from Continuum Modeling results

11. 3D modeling of destressed rock mass using RMR, Q', and damage factor D

12. Modeling of an adit connection to a segmentally lined tunnel in FLAC3D

13. Rigid Body Spring Network models of drilling-induced tensile fractures

14. Time-dependent modeling of drifts excavated in COx claystone using FLAC3D

15. A Subspring Network Breakable Voronoi model for rock: Grain-breakage scheme

16. DEM simulation of long railway tracks through utilizing periodic boundaries

17. Stability analysis of Taipinwan Dam and its fifth regular safety assessment

18. Stability assessment for an extended stope in a case study underground mine

19. A surrogate model for real-time slope stability analysis in three dimensions

20. Handling the simulation of crack injection in FLAC3D: A return of experience

21. Pixels to discrete blocks: An approach to generate and analyze masonry walls

22. Modeling of massive soil improvement based on rigid inclusions in Mexico City

23. 3D numerical stability analysis of a footwall slope at the McArthur River Mine

24. Estimating shear stress within a clay foundation using the Burgers-creep model

25. Use of Itasca modeling tools and parametric models on slope stability analysis

26. Three-dimensional explicit structure representation in slope stability analysis

27. Simulating masonry wall behavior via DEM-based computational modeling techniques

28. Using site data and machine learning to improve numerical model parameterization

29. Developing a hybrid strength model for a complex orebody in a deep hard rock mine

30. Numerical investigation of thermal compaction with application to the COx claystone

31. A DEM-DFN method to identify connected fracture networks above mined longwall panels

32. Numerical modeling of underground excavations at the SNOWY 2.0 Power Station Complex

33. Stochastic analysis of reinforced structures with anisotropic random soil properties

34. Assessment of creep at low deviatoric stress surrounding rock salt caverns with FLAC3D

35. Assessment of shaft stability using numerical modeling: the impact of tensile strength

36. Numerical simulation of gravity driven consolidation for backfill slurry in mine stope

37. Coupled numerical model CFD-DEM of debris flow impact on an obstacle using rigid blocks

38. Criteria for evaluation of design and mining methods using mine-scale numerical modeling

39. Numerical investigations on the impact of corrosion on the capacity of welded steel mesh

40. DEM analyses of particle scaling and shear stress uniformity in direct simple shear tests

41. Numerical modeling the thermal-mechanical behaviors of rocks in post-wildfire environment

42. Numerical simulations of loose initially uniform specimens in drained triaxial compression

43. Evaluation of optimal ground motion intensity measure for estimating tailings dam displacements

44. Investigating the strength and failure mechanism of hard rock pillars using Bonded Block Models

45. Selection of input properties for improved layer in plane strain stabilized excavation problems

46. The development of hydro-mechanical coupling method based on PFC3D with the Finite Volume Method

47. Assessing the participation of temporary support measures in an underground excavation using 3DEC

48. Dynamic reinforcement strategy and design for strainburst prone excavations in an underground mine

49. Effect of geometric heterogeneity on macroscopic behavior and microcracking in granite using UDEC-BBM

50. Application of the CWFS method in FLAC2D to model brittle failure around the Qirehatear Diversion tunnel

51. Development of a numerical modeling approach in FLAC3D to estimate critical velocity for high-speed rail

52. Comparison of P2PSand and NorSand constitutive models for assessing static liquefaction in a tailings dam

53. Analyzing the effect of Continuous Miner parameters on fine particle generation: A case study in a salt mine

54. Assessing the impact of gas generation rate on mechanical behavior of MSW: A T2LBM-FLAC3D coupling framework

55. Troubleshooting the embedded modified Cam Clay Constitutive Model in FLAC3D for reproducibility and accuracy

56. The micromechanics of the progressive fracturing process in hard and strong polycrystalline rocks using PFC2D

57. Use of numerical modeling and empirical approaches to optimize safety and coal recovery in an underground coal mine

58. Modeling slope failure from initiation to runout geometry with FLAC3D and PFC3D: A back analysis of the Leo Failure event

59. Geomechanical assessment of Tishinsky Underground Mine: Understanding deformation mechanisms and predicting future stability

60. A detailed view on the process of preparing numerical models using Griddle and FLAC3D: A case of large underground mine with intersecting geologic structures

61. Estimation of displacements induced on neighboring structures by the construction of the Porte Maillot station in Paris based on observations and back-analysis of the first excavation phases