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检索条件"任意字段=Rock Characterisation,Modelling and Engineering Design Methods——The 3rd ISRM SINOROCK Symposium"

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An investigation of surface roughness measurement in rock joints with a 3D scanning device

引用

3rd International-Society-for-rock-Mechanics (isrm) sinorock symposium

作者： Moosavi, M. Rafsanjani, H. N. Mehranpour, M. H. Nazem, A. Shirazi, A. N. Univ Tehran Sch Min Engn Fac Engn Tehran Iran

ISBN: (纸本)9781138000575

Most of the discontinuities and joints do not have smooth surfaces and they are covered with random distributed roughness. Finding the effective role of surface roughness on the behavior of discontinuities and on the shear strength of joints makes roughness measurement an important factor that has to be taken into account in geotechnical investigations. These information make the basis for realistic design of underground and surface projects such as tunnel, mines etc. Roughness has various features depending on the type of specimens, size and observation scale. In some cases, different methods of measurement return different results for the same specimen. Therefore, it is necessary to measure the roughness by an appropriate method and to represent it quantitatively in a mathematically adequate way. Quantifying the topography of rippled surface is the main challenge in roughness measurement. This quantifying method should return values which should be used in shear strength formulations for discontinuities. The first step is to measure the roughness topography by an appropriate tool and then their roughness must be quantified by a suitable method. There are different tools measuring the surface roughness. One of these tools is three-dimensional geometric system. Furthermore, several converters can be used amongst which the laser convert is one of them. In this paper, geometric methods used to measure roughness are reviewed. This is followed by a discussion on the various quantitative methods measuring roughness. The 3D laser instrument to record the roughness topography is further explained. Finally, a 2-D profile of a rock joint is scanned and interpreted before and after a shear test.

关键词： Surface roughness

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Acoustic emission behaviors of the Beishan granite under uniaxial and triaxial compression conditions

引用

3rd International-Society-for-rock-Mechanics (isrm) sinorock symposium

作者： Zhao, X. G. Wang, J. Ma, L. K. Su, R. Cai, M. Wang, G. B. Beijing Res Inst Uranium Geol CNNC Key Lab Geol Disposal High Level Radioact Wa Beijing Peoples R China Laurentian Univ Bharti Sch Engn Sudbury ON Canada Chinese Acad Sci Inst Rock & Soil Mech State Key Lab Geomech & Geotech Engn Wuhan Peoples R China

ISBN: (纸本)9781138000575

Beishan granite is a candidate host rock for the construction of China's high level radioactive waste (HLW) repository. Knowledge of the mechanical behaviors of the host rock is essential to engineering design of the radioactive waste disposal system in the rock. In this paper, uniaxial and triaxial compression tests on the Beishan granite were conducted using a servo-controlled compression system. The rock samples were taken from 560 to 575 m below the ground surface in the Xinchang rock block of the Beishan area, China. Acoustic emission (AE) monitoring combined with stress-strain measurements were employed to investigate the deformation and failure behaviors of the rocks. Variations in waveform parameters were recorded continuously during rock fracturing. According to the characteristic AE parameters, a method of determining the crack initiation stress (sigma(ci)) and crack damage stress (sigma(cd)) was proposed. The experimental results indicate that the proposed AE method can be used effectively for the determination of crack initiation stress and crack damage stress thresholds in both unconfined and confined compression tests.

关键词： Acoustic emission testing

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Use of the geological subsurface for production, storage and conversion of clean energy

引用

3rd International-Society-for-rock-Mechanics (isrm) sinorock symposium

作者： Hou, M. Z. Bauer, S. Kolditz, O. Xie, H. Li, X. Yang, C. Yuan, Y. Tech Univ Clausthal Clausthal Zellerfeld Germany Univ Kiel Inst Geosci Geohydromodelling Kiel Germany Tech Univ Dresden Helmholtz Ctr Environm Res Leipzig Dresden Germany Sichuan Univ Chengdu Peoples R China Chinese Acad Sci Inst Rock & Soil Mech Beijing 100864 Peoples R China Tongji Univ Inst Underground Engn Shanghai Peoples R China

ISBN: (纸本)9781138000575

The geological subsurface may have a significant role to play on the transition to a less carbon intensive energy production of the world. This concerns both the exploitation of energy resources, such as (tight) gas and geothermal energy, as well as the use of geological formations as storage reservoirs for compressed air, (synthetic) methane or hydrogen. Geo-reservoirs thus may play an important role for future energy supply;however, they have not been adequately characterized for these new types of usage. This manuscript aims at highlighting some of the identified knowledge gaps and identifies the mayor fields of research. Structured research is required for characterizing and quantifying the governing coupled processes, both experimentally as well for numerical simulation. Geo-reservoir usage may be manifold, so a number of uses as mentioned above and their respective implications are highlighted. For actually applying the scientific knowledge for at sites, a work flow is required to bring the basic process understanding to the large scale.

关键词： Compressed air

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Remote sensing technologies in rock mass characterization

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rock characterisation,modelling and engineering design methods——the 3rd isrm sinorock symposium

作者： Q.Liu Institute of Applied Geosciences Graz University of TechnologyGrazAustria

ISBN: (纸本)9781138000575

This paper summarizes the modelling of rock structure at the scale of the in-situ engineering rock mass of interest,based on the synergistic combination of TLS,digital photogrammetry,and precise RTK-GPS *** distinctive features of the approach are:(1) all data are referenced in a common 3D Cartesian coordinate system;(2) near-continuous coverage of a project site resulting from the registration of remote sensing datasets collected from multiple scan-positions;(3) creation of high-resolution,photo-realistic,true colour 3D terrain models(point cloud or mesh) to facilitate interpretations and digital measurements of fractured rock masses,especially their structural geological *** a case study,the technologies have been applied to the fracture pattern assessment at the Ricobayo dam site.

关键词： GPS Remote sensing technologies in rock mass characterization

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The study on rock stability and optimization of construction of LPG underground storage

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rock characterisation,modelling and engineering design methods——the 3rd isrm sinorock symposium

作者： Shou-Ying He Qiang-Gang Yan Cheng-Xiang Dong Bo Yu Qingdao geotechnical investigation and surveying institute

ISBN: (纸本)9781138000575

Underground storage is the future oil and gas storage *** stability of LPG storage caves and support optimization is the content of this ***,on the base of excavation monitoring data of cave;it calculates the parameters of ***,it adopted FLAC3D to simulate the stability of rock,plastic area development and the order of excavation in the main *** the Q of rock>10,there's no plastical area showed;when Q between 1～10,the little plastic area is showed on the wall,which is mainly the shearing stress *** Q<1,more plastic area appears on the wall and floor,which extends into the depth about 1.3 m, which is distributed in arch *** the simulation results show that the order of excavation affects the surrounding rock *** article foresees the deformation of rock,which would be used to optimize the support parameters.

关键词： The study on rock stability and optimization of construction of LPG underground storage LPG

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rock failure progressive process and resultant fragment muck-piling using a hybrid finite-discrete element method

引用

rock characterisation,modelling and engineering design methods——the 3rd isrm sinorock symposium

作者： H.Y.Liu J.H.Gao Y.M.Kang Centre for Geomechanics and Geoengineering Research School of EngineeringThe University of TasmaniaHobartAustralia School of Energy Science and Engineering Henan Polytechnic University College of Resources and Civil Engineering Northeastern University

ISBN: (纸本)9781138000575

rock failure progressive processes in static tests and dynamic impact tests are modelled using a hybrid finite-discrete element *** simulated results are then compared with these recorded in literatures to calibrate the hybrid *** that,the hybrid finite-discrete element method is applied to model rock excavation in mechanical *** this study,it is concluded that the hybrid finite-discrete element method is superior to the continuum-based finite element method and the discontinuum-based discrete element method in terms of modelling rock failure progressive process and resultant fragment flow,and may be a valuable numerical tool for optimizing the design of rock cutting and drilling equipments.

关键词： red rock failure progressive process and resultant fragment muck-piling using a hybrid finite-discrete element method

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Simulation and research on the unloading mechanics parameter of jointed rock mass 3rd

引用

rock characterisation,modelling and engineering design methods——the 3rd isrm sinorock symposium

作者： Yourong Liu Shang Wu Zhihu Wu Zheng Hu Longfei Liu Kang Wang Engineering Faculty China University of Geosciences Master Engineering FacultyChina University of Geosciences

ISBN: (纸本)9781138000575

Based on Investigation and Statistics of joint surface in field,as well as indoor triaxial unloading experiment and structural plane direct shear,designed several different connectivity rate and different dip angle joint rock mass models,using the discrete element software FLAC3D to simulate triaxial unloading experiment. According to indoor triaxial unloading test and simulation results,figure out the joint sandstone's mechanics parameters under conditions of unloading,studied the influence law which in different connectivity rate and dip angle of the joint influence on rock mechanics parameters at the conditions of triaxial *** on fee basis of the above,it amends the relevant parameters of high and steep slope in YINBAZI material yard, JINPING-I hydropower *** result can provide references to similar project as geotechnical engineering design and construction et al.

关键词： Simulation and research on the unloading mechanics parameter of jointed rock mass

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Experimental investigation into biaxial compressive failure of Jinping marble

引用

rock characterisation,modelling and engineering design methods——the 3rd isrm sinorock symposium

作者： Ang Li Guojian Shao Yihuan Zhu Dong Lei College of Mechanics and Materials Hohai University State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai University

ISBN: (纸本)9781138000575;1138000574

Biaxial stress field is one of the classical forced states of surrounding rock in underground group *** far,the data of biaxial compressive test of rock is still so *** this note,macroscopic stress-strain curve is given in different loading path while free surfaces continuous deformation field of rock material is showed microscopically in the process of damage by technology of 3D Digital Image Correlation under biaxial stress *** on characteristics of macroscopic deformation and micro-mechanical damage,the failure format and regulation of Jinping marble in biaxial condition is revealed.

关键词： Experimental investigation into biaxial compressive failure of Jinping marble

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Stress and shear effects on fluid flow and solute transport in rock fractures

引用

rock characterisation,modelling and engineering design methods——the 3rd isrm sinorock symposium

作者： Lanru Jing Tomofumi Koyama Zhihong Zhao Bo Li Royal Institute of Technology StockholmSweden Stockholm University StockholmSweden Nagasaki University NagasakiJapan

ISBN: (纸本)9781138000575

This paper provides a brief summary of a continuous research programme by the authors since 2004,and highlights the research approach,achievements and outstanding issues for conceptual understanding, laboratory testing and mathematical modeling of the coupled stress-shear-fluid flow-solute transport processes of rock *** focuses are put on stress and shear induced fluid flow anisotropy,transport pass channeling, and impact of considering different retardation mechanisms in single fractures of crystalline rocks,typically granites,due to its importance for the performance and safety assessments of geological radioactive waste disposal projects.

关键词： Stress and shear effects on fluid flow and solute transport in rock fractures

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Study of deformation and strength properties of the carbonaceous phyllite under natural and saturated condition

引用

rock characterisation,modelling and engineering design methods——the 3rd isrm sinorock symposium

作者： Xixi Zhu Congxin Chen Yun Zheng Yongwei Wang Guanwen Cheng State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan Xiaohongshan

ISBN: (纸本)9781138000575

Taking the carbonaceous phyllite as investigative subject,which is the weak layer widely distributed in Yunfu pyrite,Guangdong province,the deformation characteristics and strength properties of the carbonaceous phyllite rock mass are analyzed through laboratory uniaxial and triaxial compression *** on the tests on natural and saturated carbonaceous phyllite,the elastic constitutive equations of the carbonaceous phyllite,considering the closing of micro cracks,are established;and the deformation characteristics and strength properties of water-weakening influence is *** the tests,the deformation characteristics and strength properties of the carbonaceous phyllite are further understood,which can give some advices to the design of rock slope containing weak layers of the carbonaceous phyllite.

关键词： Study of deformation and strength properties of the carbonaceous phyllite under natural and saturated condition

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