SAADOUN Abderrazak | University Abderahmane Mira, Bejaia (original) (raw)

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Papers by SAADOUN Abderrazak

Contemporary Issues in Geoenvironmental Engineering, 2017

Mining operations open induce risks of instability that can cause landslides and collapse at the ... more Mining operations open induce risks of instability that can cause landslides and collapse at the bleachers slope. These risks may occur both during and after the operation phase. The magnitude of these risks depends on the mechanical and physical characteristics of the rock mass, the geometrical dimensions of ore bodies, their spatial arrangement and the state of the operated area. If security and technology measures are not taken into account for this purpose, the environment will be affected.

Soil Testing, Soil Stability and Ground Improvement, 2017

The objective of our work is the study of the influence of the dynamic load due to the use of the... more The objective of our work is the study of the influence of the dynamic load due to the use of the explosive in the stability of the slope of an open pit mine, for this purpose we used the method of limit equilibrium to calculate the value of the safety factor through the geotechnical software SLIDE. On the one hand the calculation was carried out under static loading and on the other hand the dynamic loading is taken into account, which allowed us to conclude that the dynamic load influences the safety coefficient. Finally, a proposal to stabilize the slope at through a reprofiling of the bench is presented.

Aspects in Mining & Mineral Science, Mar 15, 2018

Open pit slope stability analysis has been performed to assess the slope deformation, state of st... more Open pit slope stability analysis has been performed to assess the slope deformation, state of stresses at critically instable failure zones, different failure modes and safe functional design of excavated slopes using the numerical modeling technique as finite element method. In the evaluation of slopes, the factor of safety values still remain the main indexes for finding out how close or far slopes are from failure. The evaluation can be done my means of numerical methods such as the finite element method. In the finite element method, the latter analysis, the so-called shear strength reduction (SSR) technique can be applied. The angle of dilatancy, soil modulus or the solution domain size is not critical parameters in this technique. The safety factor can be obtained, assuming a Mohr-Coulomb failure criterion, by reducing the strength parameters incrementally, and starting from unfactored values. In this paper we have based our study on element modeling finished using the software Plaxis, the model used is that of Mohr-Coulomb.

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 2018

Purpose. The aim of this paper is numerical modeling of the slope stability of limestone quarry i... more Purpose. The aim of this paper is numerical modeling of the slope stability of limestone quarry in dry and wet cases. Methodology. The study of slope stability was performed by the limit equilibrium method (LEM) through the SLIDE software, and numerical methods through PLAXIS and FLAC. findings. In this study, the presence of water in the marl layer has a heavy influence on the safety factor (SF), which allows for instability of the slope. Originality. The originality of this work is based on two different approaches to determine the safety factor in the dry and wet cases through three methods, the limit equilibrium, finite element and finite difference methods (FEM, FDM). Practical value. This study has shown that numerical modeling of the slope stability using three methods, LEM, FDM and FEM can be expected to produce similar results. The different methods indicate that the finite difference method in our case is the most efficient and can be used as a practical check for the other methods.

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 2020

Purpose. To analyze the sliding from the geotechnical point of view and to identify the plausible... more Purpose. To analyze the sliding from the geotechnical point of view and to identify the plausible causes that influence it. Methodology. To analyze the sliding from the geotechnical point of view and to identify the plausible causes that influence it, our study follows the following chronological order. Firstly, a feedback reconstructs the slip from the geotechnical point of view; a backanalysis is required to confirm the surface failure. Next, a check will be made of the surface failure through the finite differ ence method and using the shear strength reduction by finite difference method (SSRFD). A parametric study on the influence of the geometric parameters is performed to see the influence of the latter on the stability. The plausible cause that has directly influenced this sliding is shown. findings. This paper considers the application of three methods: limit equilibrium method (LEM), finite element method (FEM) and finite difference method (FDM) to perform back analysis and find out the layer of slope failure in an open pit mine. originality. Three different approaches LEM, FEM and FDM were used to perform the backanalysis the rock mass properties and to investigate the slope failure mechanism and the accuracy of this method in mining engineering field. Practical value. This study has illustrated that noncompliance with the art, open pit mining standards and early planning of the mining method can most often lead to critical situations and catastrophic results. The back analysis of the slip site allowed us to reconstruct the break already observed and to draw maximum lessons on the mode, location and mechanical parameters that triggered this break.

Aspects in Mining & Mineral Science, 2019

The stability of slopes in open pit mines is an issue of great concern because of the significant... more The stability of slopes in open pit mines is an issue of great concern because of the significant detrimental consequences instabilities can have. The stability of open pit is controlled by several geotechnical and geological factors, the most important cracks in the rocks as well as various and homogeneous of layers. In the case of study presence of a tensile crack is the most critical case in the calculation of factor of safety because of the possibility of the presence of waters in this crack that influence negatively on the stability of the open pit with traction crack, Then the mechanical characteristics of the crack filling material are more degraded than those of the marl layer between the layer of limestone open pit LAFARGE. With the differences both methods possess, sensitivity analyses and comparisons of result were done using Slide, Flac and Plaxis software for the analysis of sliding and stability of open pit. These evaluations have been performed by the limit equilibrium method through the SLIDE software, the finite element, finite difference methods through PLAXIS and FLAC respectively.

Aspects in Mining & Mineral Science, 2019

Blasting is the most productive excavation method in hard rock mining. In quarries, to remove the... more Blasting is the most productive excavation method in hard rock mining. In quarries, to remove the mother rock from in-situ and crush into the desired size is realized by bench blasting method. The latter more used in our country because it is a very profitable method. In the quarry of Jebel Medjounes in Ain El-Kebira eastherne Algeria (Setif), the fragmentation of the rocks is done by blasting. The primary purpose of blasting is to fragment rock, and there are significant rewards for delivering a fragmentation size range. Various models have been put forward over the years, attempting to analyse the size distribution resulting from particular blast designs such as Kuz-Ram model and digital image processing (SplitDesktop® software). The Kuz–Ram model is possibly the most widely used approach to estimating fragmentation from blasting, and the most important function of Kuz–Ram is to guide the blasting engineer in thinking through the effect of various parameters when attempting to imp...

Naukovyi Visnyk NHU, 2018, № 5, 2018

Purpose. The aim of this paper is numerical modeling of the slope stability of limestone quarry i... more Purpose. The aim of this paper is numerical modeling of the slope stability of limestone quarry in dry and wet cases. Methodology. The study of slope stability was performed by the limit equilibrium method (LEM) through the SLIDE software, and numerical methods through PLAXIS and FLAC. findings. In this study, the presence of water in the marl layer has a heavy influence on the safety factor (SF), which allows for instability of the slope. Originality. The originality of this work is based on two different approaches to determine the safety factor in the dry and wet cases through three methods, the limit equilibrium, finite element and finite difference methods (FEM, FDM). Practical value. This study has shown that numerical modeling of the slope stability using three methods, LEM, FDM and FEM can be expected to produce similar results. The different methods indicate that the finite difference method in our case is the most efficient and can be used as a practical check for the other methods.

Aspects Min Miner Sc, 2018

Open pit slope stability analysis has been performed to assess the slope deformation, state of st... more Open pit slope stability analysis has been performed to assess the slope deformation, state of stresses at critically instable failure zones,different failure modes and safe functional design of excavated slopes using the numerical modeling technique as finite element method. In the evaluation of slopes, the factor of safety values still remain the main indexes for finding out how close or far slopes are from failure. The evaluation can be done my
means of numerical methods such as the finite element method. In the finite element method, the latter analysis, the so-called shear strength reduction (SSR) technique can be applied. The angle of dilatancy, soil modulus or the solution domain size is not critical parameters in this technique. The safety factor can be obtained, assuming a Mohr-Coulomb failure criterion, by reducing the strength parameters incrementally, and starting from unfactored values. In this paper we have based our study on element modeling finished using the software plaxis.

Contemporary Issues in Geoenvironmental Engineering, 2017

Mining operations open induce risks of instability that can cause landslides and collapse at the ... more Mining operations open induce risks of instability that can cause landslides and collapse at the bleachers slope. These risks may occur both during and after the operation phase. The magnitude of these risks depends on the mechanical and physical characteristics of the rock mass, the geometrical dimensions of ore bodies, their spatial arrangement and the state of the operated area. If security and technology measures are not taken into account for this purpose, the environment will be affected.

Soil Testing, Soil Stability and Ground Improvement, 2017

The objective of our work is the study of the influence of the dynamic load due to the use of the... more The objective of our work is the study of the influence of the dynamic load due to the use of the explosive in the stability of the slope of an open pit mine, for this purpose we used the method of limit equilibrium to calculate the value of the safety factor through the geotechnical software SLIDE. On the one hand the calculation was carried out under static loading and on the other hand the dynamic loading is taken into account, which allowed us to conclude that the dynamic load influences the safety coefficient. Finally, a proposal to stabilize the slope at through a reprofiling of the bench is presented.

Aspects in Mining & Mineral Science, Mar 15, 2018

Open pit slope stability analysis has been performed to assess the slope deformation, state of st... more Open pit slope stability analysis has been performed to assess the slope deformation, state of stresses at critically instable failure zones, different failure modes and safe functional design of excavated slopes using the numerical modeling technique as finite element method. In the evaluation of slopes, the factor of safety values still remain the main indexes for finding out how close or far slopes are from failure. The evaluation can be done my means of numerical methods such as the finite element method. In the finite element method, the latter analysis, the so-called shear strength reduction (SSR) technique can be applied. The angle of dilatancy, soil modulus or the solution domain size is not critical parameters in this technique. The safety factor can be obtained, assuming a Mohr-Coulomb failure criterion, by reducing the strength parameters incrementally, and starting from unfactored values. In this paper we have based our study on element modeling finished using the software Plaxis, the model used is that of Mohr-Coulomb.

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 2018

Purpose. The aim of this paper is numerical modeling of the slope stability of limestone quarry i... more Purpose. The aim of this paper is numerical modeling of the slope stability of limestone quarry in dry and wet cases. Methodology. The study of slope stability was performed by the limit equilibrium method (LEM) through the SLIDE software, and numerical methods through PLAXIS and FLAC. findings. In this study, the presence of water in the marl layer has a heavy influence on the safety factor (SF), which allows for instability of the slope. Originality. The originality of this work is based on two different approaches to determine the safety factor in the dry and wet cases through three methods, the limit equilibrium, finite element and finite difference methods (FEM, FDM). Practical value. This study has shown that numerical modeling of the slope stability using three methods, LEM, FDM and FEM can be expected to produce similar results. The different methods indicate that the finite difference method in our case is the most efficient and can be used as a practical check for the other methods.

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 2020

Purpose. To analyze the sliding from the geotechnical point of view and to identify the plausible... more Purpose. To analyze the sliding from the geotechnical point of view and to identify the plausible causes that influence it. Methodology. To analyze the sliding from the geotechnical point of view and to identify the plausible causes that influence it, our study follows the following chronological order. Firstly, a feedback reconstructs the slip from the geotechnical point of view; a backanalysis is required to confirm the surface failure. Next, a check will be made of the surface failure through the finite differ ence method and using the shear strength reduction by finite difference method (SSRFD). A parametric study on the influence of the geometric parameters is performed to see the influence of the latter on the stability. The plausible cause that has directly influenced this sliding is shown. findings. This paper considers the application of three methods: limit equilibrium method (LEM), finite element method (FEM) and finite difference method (FDM) to perform back analysis and find out the layer of slope failure in an open pit mine. originality. Three different approaches LEM, FEM and FDM were used to perform the backanalysis the rock mass properties and to investigate the slope failure mechanism and the accuracy of this method in mining engineering field. Practical value. This study has illustrated that noncompliance with the art, open pit mining standards and early planning of the mining method can most often lead to critical situations and catastrophic results. The back analysis of the slip site allowed us to reconstruct the break already observed and to draw maximum lessons on the mode, location and mechanical parameters that triggered this break.

Aspects in Mining & Mineral Science, 2019

The stability of slopes in open pit mines is an issue of great concern because of the significant... more The stability of slopes in open pit mines is an issue of great concern because of the significant detrimental consequences instabilities can have. The stability of open pit is controlled by several geotechnical and geological factors, the most important cracks in the rocks as well as various and homogeneous of layers. In the case of study presence of a tensile crack is the most critical case in the calculation of factor of safety because of the possibility of the presence of waters in this crack that influence negatively on the stability of the open pit with traction crack, Then the mechanical characteristics of the crack filling material are more degraded than those of the marl layer between the layer of limestone open pit LAFARGE. With the differences both methods possess, sensitivity analyses and comparisons of result were done using Slide, Flac and Plaxis software for the analysis of sliding and stability of open pit. These evaluations have been performed by the limit equilibrium method through the SLIDE software, the finite element, finite difference methods through PLAXIS and FLAC respectively.

Aspects in Mining & Mineral Science, 2019

Blasting is the most productive excavation method in hard rock mining. In quarries, to remove the... more Blasting is the most productive excavation method in hard rock mining. In quarries, to remove the mother rock from in-situ and crush into the desired size is realized by bench blasting method. The latter more used in our country because it is a very profitable method. In the quarry of Jebel Medjounes in Ain El-Kebira eastherne Algeria (Setif), the fragmentation of the rocks is done by blasting. The primary purpose of blasting is to fragment rock, and there are significant rewards for delivering a fragmentation size range. Various models have been put forward over the years, attempting to analyse the size distribution resulting from particular blast designs such as Kuz-Ram model and digital image processing (SplitDesktop® software). The Kuz–Ram model is possibly the most widely used approach to estimating fragmentation from blasting, and the most important function of Kuz–Ram is to guide the blasting engineer in thinking through the effect of various parameters when attempting to imp...

Naukovyi Visnyk NHU, 2018, № 5, 2018

Purpose. The aim of this paper is numerical modeling of the slope stability of limestone quarry i... more Purpose. The aim of this paper is numerical modeling of the slope stability of limestone quarry in dry and wet cases. Methodology. The study of slope stability was performed by the limit equilibrium method (LEM) through the SLIDE software, and numerical methods through PLAXIS and FLAC. findings. In this study, the presence of water in the marl layer has a heavy influence on the safety factor (SF), which allows for instability of the slope. Originality. The originality of this work is based on two different approaches to determine the safety factor in the dry and wet cases through three methods, the limit equilibrium, finite element and finite difference methods (FEM, FDM). Practical value. This study has shown that numerical modeling of the slope stability using three methods, LEM, FDM and FEM can be expected to produce similar results. The different methods indicate that the finite difference method in our case is the most efficient and can be used as a practical check for the other methods.

Aspects Min Miner Sc, 2018

Open pit slope stability analysis has been performed to assess the slope deformation, state of st... more Open pit slope stability analysis has been performed to assess the slope deformation, state of stresses at critically instable failure zones,different failure modes and safe functional design of excavated slopes using the numerical modeling technique as finite element method. In the evaluation of slopes, the factor of safety values still remain the main indexes for finding out how close or far slopes are from failure. The evaluation can be done my
means of numerical methods such as the finite element method. In the finite element method, the latter analysis, the so-called shear strength reduction (SSR) technique can be applied. The angle of dilatancy, soil modulus or the solution domain size is not critical parameters in this technique. The safety factor can be obtained, assuming a Mohr-Coulomb failure criterion, by reducing the strength parameters incrementally, and starting from unfactored values. In this paper we have based our study on element modeling finished using the software plaxis.