際際滷shows by User: alexvyazmensky / http://www.slideshare.net/images/logo.gif 際際滷shows by User: alexvyazmensky / Wed, 02 May 2018 05:27:23 GMT 際際滷Share feed for 際際滷shows by User: alexvyazmensky The role and importance of geotechnical engineering for a mining operation (1) /slideshow/the-role-and-importance-of-geotechnical-engineering-for-a-mining-operation-1/95656097 theroleandimportanceofgeotechnicalengineeringforaminingoperation1-180502052724
Geotechnical Engineering has become an integral part of mine operations fairly recently. Three decades ago, very few mines employed site based geotechnical engineers, geotechnical design and operational support were primarily carried out by specialized consultancies and/or research institutions. Nowadays, global mining companies develop in-house geotechnical expertise at corporate and mine levels and hire consultants to undertake mining project studies or assist in solving specific ground engineering problems. This important change was brought about by strict mine safety regulations enacted in 1990ties and gradual recognition by the mining community of the value of ground engineering in optimizing mine design and managing the geotechnical risks. While majority of the mining companies have already stablished geotechnical capabilities, many are yet to develop or upgrade them. This article aims to increase awareness of the role and importance of geotechnical engineering in mining.]]>
Geotechnical Engineering has become an integral part of mine operations fairly recently. Three decades ago, very few mines employed site based geotechnical engineers, geotechnical design and operational support were primarily carried out by specialized consultancies and/or research institutions. Nowadays, global mining companies develop in-house geotechnical expertise at corporate and mine levels and hire consultants to undertake mining project studies or assist in solving specific ground engineering problems. This important change was brought about by strict mine safety regulations enacted in 1990ties and gradual recognition by the mining community of the value of ground engineering in optimizing mine design and managing the geotechnical risks. While majority of the mining companies have already stablished geotechnical capabilities, many are yet to develop or upgrade them. This article aims to increase awareness of the role and importance of geotechnical engineering in mining.]]> Wed, 02 May 2018 05:27:23 GMT /slideshow/the-role-and-importance-of-geotechnical-engineering-for-a-mining-operation-1/95656097 alexvyazmensky@slideshare.net(alexvyazmensky) The role and importance of geotechnical engineering for a mining operation (1) alexvyazmensky Geotechnical Engineering has become an integral part of mine operations fairly recently. Three decades ago, very few mines employed site based geotechnical engineers, geotechnical design and operational support were primarily carried out by specialized consultancies and/or research institutions. Nowadays, global mining companies develop in-house geotechnical expertise at corporate and mine levels and hire consultants to undertake mining project studies or assist in solving specific ground engineering problems. This important change was brought about by strict mine safety regulations enacted in 1990ties and gradual recognition by the mining community of the value of ground engineering in optimizing mine design and managing the geotechnical risks. While majority of the mining companies have already stablished geotechnical capabilities, many are yet to develop or upgrade them. This article aims to increase awareness of the role and importance of geotechnical engineering in mining. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/theroleandimportanceofgeotechnicalengineeringforaminingoperation1-180502052724-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> Geotechnical Engineering has become an integral part of mine operations fairly recently. Three decades ago, very few mines employed site based geotechnical engineers, geotechnical design and operational support were primarily carried out by specialized consultancies and/or research institutions. Nowadays, global mining companies develop in-house geotechnical expertise at corporate and mine levels and hire consultants to undertake mining project studies or assist in solving specific ground engineering problems. This important change was brought about by strict mine safety regulations enacted in 1990ties and gradual recognition by the mining community of the value of ground engineering in optimizing mine design and managing the geotechnical risks. While majority of the mining companies have already stablished geotechnical capabilities, many are yet to develop or upgrade them. This article aims to increase awareness of the role and importance of geotechnical engineering in mining.
The role and importance of geotechnical engineering for a mining operation (1) from Dr. Alex Vyazmensky
]]> 1682 6 https://cdn.slidesharecdn.com/ss_thumbnails/theroleandimportanceofgeotechnicalengineeringforaminingoperation1-180502052724-thumbnail.jpg?width=120&height=120&fit=bounds document Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Geotechnical or Geomechanical? /slideshow/geotechnical-or-geomechanical/95656090 geotechnicalorgeomechanical-180502052720
Geotechnical or Geomechanical? What is the right terminology for mining?]]>
Geotechnical or Geomechanical? What is the right terminology for mining?]]> Wed, 02 May 2018 05:27:20 GMT /slideshow/geotechnical-or-geomechanical/95656090 alexvyazmensky@slideshare.net(alexvyazmensky) Geotechnical or Geomechanical? alexvyazmensky Geotechnical or Geomechanical? What is the right terminology for mining? <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/geotechnicalorgeomechanical-180502052720-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> Geotechnical or Geomechanical? What is the right terminology for mining?
Geotechnical or Geomechanical? from Dr. Alex Vyazmensky
]]> 618 5 https://cdn.slidesharecdn.com/ss_thumbnails/geotechnicalorgeomechanical-180502052720-thumbnail.jpg?width=120&height=120&fit=bounds document Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Application of Drones for Mining Ooperations /alexvyazmensky/application-of-drones-for-mining-ooperations applicationofdronesforminingoperations-180502052719
Overview of Application of Drones for Mining Ooperations]]>
Overview of Application of Drones for Mining Ooperations]]> Wed, 02 May 2018 05:27:19 GMT /alexvyazmensky/application-of-drones-for-mining-ooperations alexvyazmensky@slideshare.net(alexvyazmensky) Application of Drones for Mining Ooperations alexvyazmensky Overview of Application of Drones for Mining Ooperations <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/applicationofdronesforminingoperations-180502052719-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> Overview of Application of Drones for Mining Ooperations
Application of Drones for Mining Ooperations from Dr. Alex Vyazmensky
]]> 1667 5 https://cdn.slidesharecdn.com/ss_thumbnails/applicationofdronesforminingoperations-180502052719-thumbnail.jpg?width=120&height=120&fit=bounds document Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 MASc thesis: NUMERICAL MODELLING OF TIME DEPENDENT PORE PRESSURE RESPONSE INDUCED BY HELICAL PILE INSTALLATION /slideshow/masc-thesis-numerical-modelling-of-time-dependent-pore-pressure-response-induced-by-helical-pile-installation/34777497 numerical-modelling-of-time-dependen-140516132732-phpapp01
The purposes of this research are to apply numerical modelling to prediction of the pore water pressure response induced by helical pile installation into fine-grained soil and to gain better understanding of the pore pressure behaviour observed during the field study of helical pile - soil interaction, performed at the Colebrook test site at Surrey, B.C. by Weech (2002). The critical state NorSand soil model coupled with the Biot formulation were chosen to represent the behaviour of saturated fine-grained soil. Their finite element implementation into NorSandBiot code was adopted as a modelling framework. Thorough verification of the finite element implementation of NorSandBiot code was conducted. Within the NorSandBiot code framework a special procedure for modelling helical pile installation in 1-D using a cylindrical cavity analogy was developed. A comprehensive parametric study of the NorSandBiot code was conducted. It was found that computed pore water pressure response is very sensitive to variation of the soil OCR and its hydraulic conductivity kr. Helical pile installation was modelled in two stages. At the first stage expansion of a single cavity, corresponding to the helical pile shaft, was analysed and on the second stage additional cavity expansion/contraction cycles, representing the helices, were added. The pore pressure predictions were compared and contrasted with the pore pressure measurements performed by Weech (2002) and other sources. The modelling showed that simulation of helical pile installation using a single cavity expansion within NorSandBiot framework provided reasonable predictions of the pore pressure response observed in the field. More realistic simulation using series of cavity expansion/contraction cycles improves the predictions. The modelling confirmed many of the field observations made by Weech (2004) and proved that a fully coupled NorSandBiot modelling framework provides a realistic environment for simulation of the fine-grained soil behaviour. The proposed modelling approach to simulation of helical pile installation provided a simplified technique that allows reasonable predictions of stresses and pore pressures variation during and after helical pile installation.]]>
The purposes of this research are to apply numerical modelling to prediction of the pore water pressure response induced by helical pile installation into fine-grained soil and to gain better understanding of the pore pressure behaviour observed during the field study of helical pile - soil interaction, performed at the Colebrook test site at Surrey, B.C. by Weech (2002). The critical state NorSand soil model coupled with the Biot formulation were chosen to represent the behaviour of saturated fine-grained soil. Their finite element implementation into NorSandBiot code was adopted as a modelling framework. Thorough verification of the finite element implementation of NorSandBiot code was conducted. Within the NorSandBiot code framework a special procedure for modelling helical pile installation in 1-D using a cylindrical cavity analogy was developed. A comprehensive parametric study of the NorSandBiot code was conducted. It was found that computed pore water pressure response is very sensitive to variation of the soil OCR and its hydraulic conductivity kr. Helical pile installation was modelled in two stages. At the first stage expansion of a single cavity, corresponding to the helical pile shaft, was analysed and on the second stage additional cavity expansion/contraction cycles, representing the helices, were added. The pore pressure predictions were compared and contrasted with the pore pressure measurements performed by Weech (2002) and other sources. The modelling showed that simulation of helical pile installation using a single cavity expansion within NorSandBiot framework provided reasonable predictions of the pore pressure response observed in the field. More realistic simulation using series of cavity expansion/contraction cycles improves the predictions. The modelling confirmed many of the field observations made by Weech (2004) and proved that a fully coupled NorSandBiot modelling framework provides a realistic environment for simulation of the fine-grained soil behaviour. The proposed modelling approach to simulation of helical pile installation provided a simplified technique that allows reasonable predictions of stresses and pore pressures variation during and after helical pile installation.]]> Fri, 16 May 2014 13:27:32 GMT /slideshow/masc-thesis-numerical-modelling-of-time-dependent-pore-pressure-response-induced-by-helical-pile-installation/34777497 alexvyazmensky@slideshare.net(alexvyazmensky) MASc thesis: NUMERICAL MODELLING OF TIME DEPENDENT PORE PRESSURE RESPONSE INDUCED BY HELICAL PILE INSTALLATION alexvyazmensky The purposes of this research are to apply numerical modelling to prediction of the pore water pressure response induced by helical pile installation into fine-grained soil and to gain better understanding of the pore pressure behaviour observed during the field study of helical pile - soil interaction, performed at the Colebrook test site at Surrey, B.C. by Weech (2002). The critical state NorSand soil model coupled with the Biot formulation were chosen to represent the behaviour of saturated fine-grained soil. Their finite element implementation into NorSandBiot code was adopted as a modelling framework. Thorough verification of the finite element implementation of NorSandBiot code was conducted. Within the NorSandBiot code framework a special procedure for modelling helical pile installation in 1-D using a cylindrical cavity analogy was developed. A comprehensive parametric study of the NorSandBiot code was conducted. It was found that computed pore water pressure response is very sensitive to variation of the soil OCR and its hydraulic conductivity kr. Helical pile installation was modelled in two stages. At the first stage expansion of a single cavity, corresponding to the helical pile shaft, was analysed and on the second stage additional cavity expansion/contraction cycles, representing the helices, were added. The pore pressure predictions were compared and contrasted with the pore pressure measurements performed by Weech (2002) and other sources. The modelling showed that simulation of helical pile installation using a single cavity expansion within NorSandBiot framework provided reasonable predictions of the pore pressure response observed in the field. More realistic simulation using series of cavity expansion/contraction cycles improves the predictions. The modelling confirmed many of the field observations made by Weech (2004) and proved that a fully coupled NorSandBiot modelling framework provides a realistic environment for simulation of the fine-grained soil behaviour. The proposed modelling approach to simulation of helical pile installation provided a simplified technique that allows reasonable predictions of stresses and pore pressures variation during and after helical pile installation. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/numerical-modelling-of-time-dependen-140516132732-phpapp01-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> The purposes of this research are to apply numerical modelling to prediction of the pore water pressure response induced by helical pile installation into fine-grained soil and to gain better understanding of the pore pressure behaviour observed during the field study of helical pile - soil interaction, performed at the Colebrook test site at Surrey, B.C. by Weech (2002). The critical state NorSand soil model coupled with the Biot formulation were chosen to represent the behaviour of saturated fine-grained soil. Their finite element implementation into NorSandBiot code was adopted as a modelling framework. Thorough verification of the finite element implementation of NorSandBiot code was conducted. Within the NorSandBiot code framework a special procedure for modelling helical pile installation in 1-D using a cylindrical cavity analogy was developed. A comprehensive parametric study of the NorSandBiot code was conducted. It was found that computed pore water pressure response is very sensitive to variation of the soil OCR and its hydraulic conductivity kr. Helical pile installation was modelled in two stages. At the first stage expansion of a single cavity, corresponding to the helical pile shaft, was analysed and on the second stage additional cavity expansion/contraction cycles, representing the helices, were added. The pore pressure predictions were compared and contrasted with the pore pressure measurements performed by Weech (2002) and other sources. The modelling showed that simulation of helical pile installation using a single cavity expansion within NorSandBiot framework provided reasonable predictions of the pore pressure response observed in the field. More realistic simulation using series of cavity expansion/contraction cycles improves the predictions. The modelling confirmed many of the field observations made by Weech (2004) and proved that a fully coupled NorSandBiot modelling framework provides a realistic environment for simulation of the fine-grained soil behaviour. The proposed modelling approach to simulation of helical pile installation provided a simplified technique that allows reasonable predictions of stresses and pore pressures variation during and after helical pile installation.
MASc thesis: NUMERICAL MODELLING OF TIME DEPENDENT PORE PRESSURE RESPONSE INDUCED BY HELICAL PILE INSTALLATION from Dr. Alex Vyazmensky
]]> 1060 15 https://cdn.slidesharecdn.com/ss_thumbnails/numerical-modelling-of-time-dependen-140516132732-phpapp01-thumbnail.jpg?width=120&height=120&fit=bounds document Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Phd Thesis: Numerical modelling of surface subsidence associated with block caving mining using FEM/DEM modelling approach /slideshow/phd-thesis-numerical-modelling-of-surface-subsidence-associated-with-block-caving-mining-using-femdem-modelling-approach/34777372 alexvyazmenskyphdthesis-140516132322-phpapp02
Through the use of an integrated FEM/DEM-DFN modelling technique this thesis presents a new approach to simulation of block caving induced surface subsidence allowing physically realistic simulation of subsidence development from caving initiation to final subsidence deformation. As part of the current research, a fundamental issue in modelling, the selection of representative equivalent continuum rock mass modelling parameters, is investigated and a procedure for calibration of modelling parameters devised. Utilizing a series of conceptual numerical experiments our fundamental understanding of the mechanisms and the role of the factors controlling block caving subsidence development is investigated. Valuable insights gained from this work are summarized in a preliminary subsidence classification and an influence assessment matrix of the governing factors. These are intended as an aid to engineering judgment for decision makers at the pre-feasibility and mine design stages. This study also addresses one of the most challenging problems in mining rock engineering - the interaction between block cave mining and a large overlying open pit, focusing on caving induced step-path failure initialization. Using a novel approach to modelling data analysis a clear link between caving propagation, step-path failure development within the slope, and the resultant surface subsidence is established. In addition, FEM/DEM-DFN modelling is applied to the preliminary analysis of the block caving triggered slope failure at Palabora open pit. This research represents a valuable contribution to block caving geomechanics and is a major step forward in the understanding of complex block caving subsidence phenomena, paving the way to more reliable assessment of caving induced subsidence deformations.]]>
Through the use of an integrated FEM/DEM-DFN modelling technique this thesis presents a new approach to simulation of block caving induced surface subsidence allowing physically realistic simulation of subsidence development from caving initiation to final subsidence deformation. As part of the current research, a fundamental issue in modelling, the selection of representative equivalent continuum rock mass modelling parameters, is investigated and a procedure for calibration of modelling parameters devised. Utilizing a series of conceptual numerical experiments our fundamental understanding of the mechanisms and the role of the factors controlling block caving subsidence development is investigated. Valuable insights gained from this work are summarized in a preliminary subsidence classification and an influence assessment matrix of the governing factors. These are intended as an aid to engineering judgment for decision makers at the pre-feasibility and mine design stages. This study also addresses one of the most challenging problems in mining rock engineering - the interaction between block cave mining and a large overlying open pit, focusing on caving induced step-path failure initialization. Using a novel approach to modelling data analysis a clear link between caving propagation, step-path failure development within the slope, and the resultant surface subsidence is established. In addition, FEM/DEM-DFN modelling is applied to the preliminary analysis of the block caving triggered slope failure at Palabora open pit. This research represents a valuable contribution to block caving geomechanics and is a major step forward in the understanding of complex block caving subsidence phenomena, paving the way to more reliable assessment of caving induced subsidence deformations.]]> Fri, 16 May 2014 13:23:22 GMT /slideshow/phd-thesis-numerical-modelling-of-surface-subsidence-associated-with-block-caving-mining-using-femdem-modelling-approach/34777372 alexvyazmensky@slideshare.net(alexvyazmensky) Phd Thesis: Numerical modelling of surface subsidence associated with block caving mining using FEM/DEM modelling approach alexvyazmensky Through the use of an integrated FEM/DEM-DFN modelling technique this thesis presents a new approach to simulation of block caving induced surface subsidence allowing physically realistic simulation of subsidence development from caving initiation to final subsidence deformation. As part of the current research, a fundamental issue in modelling, the selection of representative equivalent continuum rock mass modelling parameters, is investigated and a procedure for calibration of modelling parameters devised. Utilizing a series of conceptual numerical experiments our fundamental understanding of the mechanisms and the role of the factors controlling block caving subsidence development is investigated. Valuable insights gained from this work are summarized in a preliminary subsidence classification and an influence assessment matrix of the governing factors. These are intended as an aid to engineering judgment for decision makers at the pre-feasibility and mine design stages. This study also addresses one of the most challenging problems in mining rock engineering - the interaction between block cave mining and a large overlying open pit, focusing on caving induced step-path failure initialization. Using a novel approach to modelling data analysis a clear link between caving propagation, step-path failure development within the slope, and the resultant surface subsidence is established. In addition, FEM/DEM-DFN modelling is applied to the preliminary analysis of the block caving triggered slope failure at Palabora open pit. This research represents a valuable contribution to block caving geomechanics and is a major step forward in the understanding of complex block caving subsidence phenomena, paving the way to more reliable assessment of caving induced subsidence deformations. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/alexvyazmenskyphdthesis-140516132322-phpapp02-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> Through the use of an integrated FEM/DEM-DFN modelling technique this thesis presents a new approach to simulation of block caving induced surface subsidence allowing physically realistic simulation of subsidence development from caving initiation to final subsidence deformation. As part of the current research, a fundamental issue in modelling, the selection of representative equivalent continuum rock mass modelling parameters, is investigated and a procedure for calibration of modelling parameters devised. Utilizing a series of conceptual numerical experiments our fundamental understanding of the mechanisms and the role of the factors controlling block caving subsidence development is investigated. Valuable insights gained from this work are summarized in a preliminary subsidence classification and an influence assessment matrix of the governing factors. These are intended as an aid to engineering judgment for decision makers at the pre-feasibility and mine design stages. This study also addresses one of the most challenging problems in mining rock engineering - the interaction between block cave mining and a large overlying open pit, focusing on caving induced step-path failure initialization. Using a novel approach to modelling data analysis a clear link between caving propagation, step-path failure development within the slope, and the resultant surface subsidence is established. In addition, FEM/DEM-DFN modelling is applied to the preliminary analysis of the block caving triggered slope failure at Palabora open pit. This research represents a valuable contribution to block caving geomechanics and is a major step forward in the understanding of complex block caving subsidence phenomena, paving the way to more reliable assessment of caving induced subsidence deformations.
Phd Thesis: Numerical modelling of surface subsidence associated with block caving mining using FEM/DEM modelling approach from Dr. Alex Vyazmensky
]]> 5454 20 https://cdn.slidesharecdn.com/ss_thumbnails/alexvyazmenskyphdthesis-140516132322-phpapp02-thumbnail.jpg?width=120&height=120&fit=bounds document 000000 http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Role of rock mass fabric and faulting in the development of block caving induced surface subsidence /slideshow/role-of-rock-mass-fabric-and-faulting-in-the-development-of-block-caving-induced-surface-subsidence/34777012 roleofrockmassfabricandfaultinginthedevelopmentofblockcavinginducedsurfacesubsidenceweb-140516131123-phpapp02
Extraction of a large volume of ore during block caving can lead to the formation of significant surface subsidence. Current knowledge of the mechanisms that control subsidence development is limited as are our subsidence prediction capabilities. Mining experience suggests that, among other contributing factors, geological structures play a particularly important role in subsidence development. A conceptual modeling study has been undertaken to evaluate the significance of geological structure on surface subsidence. A hybrid finite/discrete element technique incorporating a coupled elasto-plastic fracture mechanics constitutive criterion is adopted; this allows physically realistic modeling of block caving through simulation of the transition from a continuum to a discontinuum. Numerical experiments presented emphasize the importance of joint orientation and fault location on mechanisms of subsidence development and the governing role of geological structure in defining the degree of surface subsidence asymmetry.]]>
Extraction of a large volume of ore during block caving can lead to the formation of significant surface subsidence. Current knowledge of the mechanisms that control subsidence development is limited as are our subsidence prediction capabilities. Mining experience suggests that, among other contributing factors, geological structures play a particularly important role in subsidence development. A conceptual modeling study has been undertaken to evaluate the significance of geological structure on surface subsidence. A hybrid finite/discrete element technique incorporating a coupled elasto-plastic fracture mechanics constitutive criterion is adopted; this allows physically realistic modeling of block caving through simulation of the transition from a continuum to a discontinuum. Numerical experiments presented emphasize the importance of joint orientation and fault location on mechanisms of subsidence development and the governing role of geological structure in defining the degree of surface subsidence asymmetry.]]> Fri, 16 May 2014 13:11:23 GMT /slideshow/role-of-rock-mass-fabric-and-faulting-in-the-development-of-block-caving-induced-surface-subsidence/34777012 alexvyazmensky@slideshare.net(alexvyazmensky) Role of rock mass fabric and faulting in the development of block caving induced surface subsidence alexvyazmensky Extraction of a large volume of ore during block caving can lead to the formation of significant surface subsidence. Current knowledge of the mechanisms that control subsidence development is limited as are our subsidence prediction capabilities. Mining experience suggests that, among other contributing factors, geological structures play a particularly important role in subsidence development. A conceptual modeling study has been undertaken to evaluate the significance of geological structure on surface subsidence. A hybrid finite/discrete element technique incorporating a coupled elasto-plastic fracture mechanics constitutive criterion is adopted; this allows physically realistic modeling of block caving through simulation of the transition from a continuum to a discontinuum. Numerical experiments presented emphasize the importance of joint orientation and fault location on mechanisms of subsidence development and the governing role of geological structure in defining the degree of surface subsidence asymmetry. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/roleofrockmassfabricandfaultinginthedevelopmentofblockcavinginducedsurfacesubsidenceweb-140516131123-phpapp02-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> Extraction of a large volume of ore during block caving can lead to the formation of significant surface subsidence. Current knowledge of the mechanisms that control subsidence development is limited as are our subsidence prediction capabilities. Mining experience suggests that, among other contributing factors, geological structures play a particularly important role in subsidence development. A conceptual modeling study has been undertaken to evaluate the significance of geological structure on surface subsidence. A hybrid finite/discrete element technique incorporating a coupled elasto-plastic fracture mechanics constitutive criterion is adopted; this allows physically realistic modeling of block caving through simulation of the transition from a continuum to a discontinuum. Numerical experiments presented emphasize the importance of joint orientation and fault location on mechanisms of subsidence development and the governing role of geological structure in defining the degree of surface subsidence asymmetry.
Role of rock mass fabric and faulting in the development of block caving induced surface subsidence from Dr. Alex Vyazmensky
]]> 1092 6 https://cdn.slidesharecdn.com/ss_thumbnails/roleofrockmassfabricandfaultinginthedevelopmentofblockcavinginducedsurfacesubsidenceweb-140516131123-phpapp02-thumbnail.jpg?width=120&height=120&fit=bounds document Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Numerical analysis of block caving induced instability in large open pit slopes /alexvyazmensky/numerical-analysis-of-block-caving-induced-instability-in-large-open-pit-slopes numericalanalysisofblockcaving-inducedinstabilityinlargeopenpitslopesweb-140516130630-phpapp01
This paper addresses one of the most challenging problems in mining rock engineering - the interaction between block cave mining and a large overlying open pit. The FEM/DEM modelling approach was utilized in the analysis of block caving-induced step-path failure development in a large open pit slope. Analysis indicated that there is a threshold percentage of critical intact rock bridges along a step-path failure plane that may ensure stability of an open pit throughout caving operations. Transition from open pit to underground mining at Palabora mine presents an important example of a pit wall instability triggered by caving. Using combined FEM/DEM-DFN modelling it was possible to investigate the formation of a basal failure surface within an open pit slope as a direct result of cave mining. The modelling of Palabora highlighted the importance of rock mass tensile strength and its influence on caving-induced slope response.]]>
This paper addresses one of the most challenging problems in mining rock engineering - the interaction between block cave mining and a large overlying open pit. The FEM/DEM modelling approach was utilized in the analysis of block caving-induced step-path failure development in a large open pit slope. Analysis indicated that there is a threshold percentage of critical intact rock bridges along a step-path failure plane that may ensure stability of an open pit throughout caving operations. Transition from open pit to underground mining at Palabora mine presents an important example of a pit wall instability triggered by caving. Using combined FEM/DEM-DFN modelling it was possible to investigate the formation of a basal failure surface within an open pit slope as a direct result of cave mining. The modelling of Palabora highlighted the importance of rock mass tensile strength and its influence on caving-induced slope response.]]> Fri, 16 May 2014 13:06:30 GMT /alexvyazmensky/numerical-analysis-of-block-caving-induced-instability-in-large-open-pit-slopes alexvyazmensky@slideshare.net(alexvyazmensky) Numerical analysis of block caving induced instability in large open pit slopes alexvyazmensky This paper addresses one of the most challenging problems in mining rock engineering - the interaction between block cave mining and a large overlying open pit. The FEM/DEM modelling approach was utilized in the analysis of block caving-induced step-path failure development in a large open pit slope. Analysis indicated that there is a threshold percentage of critical intact rock bridges along a step-path failure plane that may ensure stability of an open pit throughout caving operations. Transition from open pit to underground mining at Palabora mine presents an important example of a pit wall instability triggered by caving. Using combined FEM/DEM-DFN modelling it was possible to investigate the formation of a basal failure surface within an open pit slope as a direct result of cave mining. The modelling of Palabora highlighted the importance of rock mass tensile strength and its influence on caving-induced slope response. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/numericalanalysisofblockcaving-inducedinstabilityinlargeopenpitslopesweb-140516130630-phpapp01-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> This paper addresses one of the most challenging problems in mining rock engineering - the interaction between block cave mining and a large overlying open pit. The FEM/DEM modelling approach was utilized in the analysis of block caving-induced step-path failure development in a large open pit slope. Analysis indicated that there is a threshold percentage of critical intact rock bridges along a step-path failure plane that may ensure stability of an open pit throughout caving operations. Transition from open pit to underground mining at Palabora mine presents an important example of a pit wall instability triggered by caving. Using combined FEM/DEM-DFN modelling it was possible to investigate the formation of a basal failure surface within an open pit slope as a direct result of cave mining. The modelling of Palabora highlighted the importance of rock mass tensile strength and its influence on caving-induced slope response.
Numerical analysis of block caving induced instability in large open pit slopes from Dr. Alex Vyazmensky
]]> 1448 12 https://cdn.slidesharecdn.com/ss_thumbnails/numericalanalysisofblockcaving-inducedinstabilityinlargeopenpitslopesweb-140516130630-phpapp01-thumbnail.jpg?width=120&height=120&fit=bounds document Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Review of geotechnical aspects associated with block caving (in Russian) /slideshow/ss-13095055/13095055 dokladwebrus-120527121947-phpapp02
舒从亳亶 仂弍亰仂 亞亠仂亠仆亳亠从亳 舒仗亠从仂于 亳亠仄 舒仄仂仂弍亠仆亳亠仄 (2007)]]>
舒从亳亶 仂弍亰仂 亞亠仂亠仆亳亠从亳 舒仗亠从仂于 亳亠仄 舒仄仂仂弍亠仆亳亠仄 (2007)]]> Sun, 27 May 2012 12:19:46 GMT /slideshow/ss-13095055/13095055 alexvyazmensky@slideshare.net(alexvyazmensky) Review of geotechnical aspects associated with block caving (in Russian) alexvyazmensky 舒从亳亶 仂弍亰仂 亞亠仂亠仆亳亠从亳 舒仗亠从仂于 亳亠仄 舒仄仂仂弍亠仆亳亠仄 (2007) <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/dokladwebrus-120527121947-phpapp02-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> 舒从亳亶 仂弍亰仂 亞亠仂亠仆亳亠从亳 舒仗亠从仂于 亳亠仄 舒仄仂仂弍亠仆亳亠仄 (2007)
Review of geotechnical aspects associated with block caving (in Russian) from Dr. Alex Vyazmensky
]]> 952 2 https://cdn.slidesharecdn.com/ss_thumbnails/dokladwebrus-120527121947-phpapp02-thumbnail.jpg?width=120&height=120&fit=bounds presentation White http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Surface subsidence associated with block caving /slideshow/block-caving-subsidencemodelling/13095018 blockcavingsubsidencemodelling-120527121311-phpapp01
summary presentation of my PhD research work at SFU (2005-2008)]]>
summary presentation of my PhD research work at SFU (2005-2008)]]> Sun, 27 May 2012 12:13:10 GMT /slideshow/block-caving-subsidencemodelling/13095018 alexvyazmensky@slideshare.net(alexvyazmensky) Surface subsidence associated with block caving alexvyazmensky summary presentation of my PhD research work at SFU (2005-2008) <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/blockcavingsubsidencemodelling-120527121311-phpapp01-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> summary presentation of my PhD research work at SFU (2005-2008)
Surface subsidence associated with block caving from Dr. Alex Vyazmensky
]]> 3046 8 https://cdn.slidesharecdn.com/ss_thumbnails/blockcavingsubsidencemodelling-120527121311-phpapp01-thumbnail.jpg?width=120&height=120&fit=bounds presentation White http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 https://public.slidesharecdn.com/v2/images/profile-picture.png http://sites.google.com/site/alexvyazmensky/home https://cdn.slidesharecdn.com/ss_thumbnails/theroleandimportanceofgeotechnicalengineeringforaminingoperation1-180502052724-thumbnail.jpg?width=320&height=320&fit=bounds slideshow/the-role-and-importance-of-geotechnical-engineering-for-a-mining-operation-1/95656097 The role and importanc... https://cdn.slidesharecdn.com/ss_thumbnails/geotechnicalorgeomechanical-180502052720-thumbnail.jpg?width=320&height=320&fit=bounds slideshow/geotechnical-or-geomechanical/95656090 Geotechnical or Geomec... https://cdn.slidesharecdn.com/ss_thumbnails/applicationofdronesforminingoperations-180502052719-thumbnail.jpg?width=320&height=320&fit=bounds alexvyazmensky/application-of-drones-for-mining-ooperations Application of Drones ...