What determines the stability of embankment and separating dams?
The stability of the embankment and separating dams of a TSF is determined by a complex of geotechnical, hydrogeological, and anthropogenic factors. The following have the greatest influence: physical and mechanical characteristics of soils and tailings (wastes); the process of construction and operation of a structure; nature of its base; hydrodynamic, hydrostatic, seismic, and dynamic forces. A structure option of the dam body at this specific section, developed on the basis of the simulation, provided a factor of safety values for the outer slope at well no. 324-19. This was FoS = 1.664 for the main combination of loads, and FoS = 1.430 for a special combination of loads under seismic action.
For more information, see the article in the journal of Mining Science and Technology (Russia):
π Bessimbayeva Π.G., Khmyrova E.N., Oleinikova E.A., Kasymzhanova A.E. Simulation of ash dump embankment stability. Mining Science and Technology (Russia). 2023;8(4):303-312. https://doi.org/10.17073/2500-0632-2022-11-30
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#inenglish #MST #ash_dump #embankment #structure #slopes #stability #simulation #soil #finite_element_method #load #factor_of_safety #drawdown_curve #head_gradient
The stability of the embankment and separating dams of a TSF is determined by a complex of geotechnical, hydrogeological, and anthropogenic factors. The following have the greatest influence: physical and mechanical characteristics of soils and tailings (wastes); the process of construction and operation of a structure; nature of its base; hydrodynamic, hydrostatic, seismic, and dynamic forces. A structure option of the dam body at this specific section, developed on the basis of the simulation, provided a factor of safety values for the outer slope at well no. 324-19. This was FoS = 1.664 for the main combination of loads, and FoS = 1.430 for a special combination of loads under seismic action.
For more information, see the article in the journal of Mining Science and Technology (Russia):
π Bessimbayeva Π.G., Khmyrova E.N., Oleinikova E.A., Kasymzhanova A.E. Simulation of ash dump embankment stability. Mining Science and Technology (Russia). 2023;8(4):303-312. https://doi.org/10.17073/2500-0632-2022-11-30
Subscribe to the journal's Telegram channel:
π t.iss.one/MinSciTech π
#inenglish #MST #ash_dump #embankment #structure #slopes #stability #simulation #soil #finite_element_method #load #factor_of_safety #drawdown_curve #head_gradient
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How to estimate the modulus of deformation of a block rock masses using discrete element simulations?
The deformation modulus of rock mass is a fundamental parameter in the geomechanics of tunnels, mining, and other geotechnical rock-supported facilities. The mechanical properties of a rock mass, seen as a fractured medium, are determined by the intact rock, the pattern of relative joint-sets, the geometrical arrangement of the joints, and their mechanical properties. Joint sets, acting as planar discontinuities, confer scale and direction-dependent mechanical properties. The critical factor influencing the deformational behavior of a rock mass is the stiffness of its fractures and discontinuities. The present study investigates the anisotropic deformation modulus of blocky rock masses formed by three intersecting joint sets, including two orthogonal sets. This was achieved through discrete element simulations of representative volumes of blocky rock masses. These studies facilitate the estimation of the blocky rock mass deformation modulus in different directions without the need for laboratory and in-situ tests or empirical relationships.
For more information, see the article:
π Ahrami O., Javaheri Koupaei H., Ahangari K. Determination of deformation modulus and characterization of anisotropic behavior of blocky rock masses. Mining Science and Technology (Russia). 2024;9(2):116-133. https://doi.org/10.17073/2500-0632-2023-08-143
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#inenglish #MST #anisotropy #deformation #modulus #mass #rocks #loading #fracture #stiffness #strength #shear #resistance #stress #displacement #sliding #quartz #modeling #coefficient #index #blocks #deformations #material #surface #structure #boundary #experiment #geomechanics #JRC #UCS #GSI #simulation
The deformation modulus of rock mass is a fundamental parameter in the geomechanics of tunnels, mining, and other geotechnical rock-supported facilities. The mechanical properties of a rock mass, seen as a fractured medium, are determined by the intact rock, the pattern of relative joint-sets, the geometrical arrangement of the joints, and their mechanical properties. Joint sets, acting as planar discontinuities, confer scale and direction-dependent mechanical properties. The critical factor influencing the deformational behavior of a rock mass is the stiffness of its fractures and discontinuities. The present study investigates the anisotropic deformation modulus of blocky rock masses formed by three intersecting joint sets, including two orthogonal sets. This was achieved through discrete element simulations of representative volumes of blocky rock masses. These studies facilitate the estimation of the blocky rock mass deformation modulus in different directions without the need for laboratory and in-situ tests or empirical relationships.
For more information, see the article:
π Ahrami O., Javaheri Koupaei H., Ahangari K. Determination of deformation modulus and characterization of anisotropic behavior of blocky rock masses. Mining Science and Technology (Russia). 2024;9(2):116-133. https://doi.org/10.17073/2500-0632-2023-08-143
Subscribe to the journal's Telegram channel:
πt.iss.one/MinSciTechπ
#inenglish #MST #anisotropy #deformation #modulus #mass #rocks #loading #fracture #stiffness #strength #shear #resistance #stress #displacement #sliding #quartz #modeling #coefficient #index #blocks #deformations #material #surface #structure #boundary #experiment #geomechanics #JRC #UCS #GSI #simulation
mst.misis.ru
Determination of deformation modulus and characterization of anisotropic behavior of blocky rock masses | Ahrami | Mining Scienceβ¦
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What are the environmental consequences of mining operations in Arctic regions?
The problems of geoenvironmental consequences of mining operations are especially acute in the arctic and subarctic regions, where the spread of permafrost significantly reduces the buffering capacity of landscapes. The research, the results of which are published in the journal Mining Science and Technology, demonstrates data on the content of heavy metals in the soil cover of the transient zone between the middle taiga and north taiga landscapes of Western Yakutia under the conditions of mining operations. The authors proposed new approaches to evaluation assesses the resistance of different types of soils to heavy metals pollution. The heavy metals content was determined by atomic absorption spectrometry. Among the studied pollutants the greatest tendency to binding by natural organic ligands was revealed for such elements as lead and copper. Zinc and nickel will actively migrate in the ionic form. Cadmium occupies an intermediate position in terms of the ratio of ionic and organically bound forms. The data presented in the study can be used in monitoring the state of the soil cover in the mining zone.
For more information, see the article:
π Titov A.S., Toropov A.S. Geoenvironmetal assessment of different types of cryolithic soils in Western Yakutia under the conditions of diamond-mining operations. Mining Science and Technology (Russia). 2024;9(2):170-182. https://doi.org/10.17073/2500-0632-2023-12-188
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#inenglish #MST #soil #heavymetals #pollution #cryolithic #WesternYakutia #diamond #mining #enterprises #geoecology #assessment #content #metals #cover #landscape #production #stability #analysis #spectrometry #modeling #structure #humus #migration #kimberlite #complex #geochemistry #thermodynamic #sample #horizon #zinc #nickel #cadmium #lead #copper #arsenic #mercury
The problems of geoenvironmental consequences of mining operations are especially acute in the arctic and subarctic regions, where the spread of permafrost significantly reduces the buffering capacity of landscapes. The research, the results of which are published in the journal Mining Science and Technology, demonstrates data on the content of heavy metals in the soil cover of the transient zone between the middle taiga and north taiga landscapes of Western Yakutia under the conditions of mining operations. The authors proposed new approaches to evaluation assesses the resistance of different types of soils to heavy metals pollution. The heavy metals content was determined by atomic absorption spectrometry. Among the studied pollutants the greatest tendency to binding by natural organic ligands was revealed for such elements as lead and copper. Zinc and nickel will actively migrate in the ionic form. Cadmium occupies an intermediate position in terms of the ratio of ionic and organically bound forms. The data presented in the study can be used in monitoring the state of the soil cover in the mining zone.
For more information, see the article:
π Titov A.S., Toropov A.S. Geoenvironmetal assessment of different types of cryolithic soils in Western Yakutia under the conditions of diamond-mining operations. Mining Science and Technology (Russia). 2024;9(2):170-182. https://doi.org/10.17073/2500-0632-2023-12-188
Subscribe to the journal's Telegram channel:
πt.iss.one/MinSciTechπ
#inenglish #MST #soil #heavymetals #pollution #cryolithic #WesternYakutia #diamond #mining #enterprises #geoecology #assessment #content #metals #cover #landscape #production #stability #analysis #spectrometry #modeling #structure #humus #migration #kimberlite #complex #geochemistry #thermodynamic #sample #horizon #zinc #nickel #cadmium #lead #copper #arsenic #mercury
mst.misis.ru
Geoenvironmetal assessment of different types of cryolithic soils in Western Yakutia under the conditions of diamond-mining operationsβ¦
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How to determine the deformation modulus and anisotropy in blocky rock masses?
πΉ In a study published in Mining Science and Technology (Russia), the authors investigated the anisotropic behavior of blocky rock masses. They employed the discrete element method to model and analyze the deformation modulus as a function of loading direction, joint properties, and intact rock characteristics.
πΉ Key Findings:
βοΈ The deformation modulus depends on the Joint Roughness Coefficient (JRC) and the Uniaxial Compressive Strength (UCS) of the intact rock.
βοΈ The influence of joint roughness on the deformation modulus is three times greater than that of intact rock strength.
βοΈ The degree of anisotropy in the deformation modulus ranged from 1.6 β€ Rβ β€ 2.5, with an average value of 1.88.
βοΈ During joint sliding failure, the yield strain (0.2β0.4) is independent of the loading angle (ΞΈ) and the orientation of the third joint set (Ξ±).
πΉ Practical Applications:
The results enable the prediction of rock mass behavior without costly field tests, which is crucial for designing tunnels, boreholes, and other geotechnical structures.
Read the full study in Mining Science and Technology (Russia):
π Ahrami O., Javaheri Koupaei H., Ahangari K. Determination of deformation modulus and characterization of anisotropic behavior of blocky rock masses. Mining Science and Technology (Russia). 2024;9(2):116β133. https://doi.org/10.17073/2500-0632-2023-08-143
π Subscribe to our Telegram channel: t.iss.one/MinSciTech
#InEnglish #MST #anisotropy #deformation #modulus #mass #rocks #loading #fracture #stiffness #strength #shear #resistance #stress #displacement #sliding #quartz #modeling #coefficient #index #blocks #deformations #material #surface #structure #boundary #experiment #geomechanics #JRC #UCS #GSI #simulation
πΉ In a study published in Mining Science and Technology (Russia), the authors investigated the anisotropic behavior of blocky rock masses. They employed the discrete element method to model and analyze the deformation modulus as a function of loading direction, joint properties, and intact rock characteristics.
πΉ Key Findings:
βοΈ The deformation modulus depends on the Joint Roughness Coefficient (JRC) and the Uniaxial Compressive Strength (UCS) of the intact rock.
βοΈ The influence of joint roughness on the deformation modulus is three times greater than that of intact rock strength.
βοΈ The degree of anisotropy in the deformation modulus ranged from 1.6 β€ Rβ β€ 2.5, with an average value of 1.88.
βοΈ During joint sliding failure, the yield strain (0.2β0.4) is independent of the loading angle (ΞΈ) and the orientation of the third joint set (Ξ±).
πΉ Practical Applications:
The results enable the prediction of rock mass behavior without costly field tests, which is crucial for designing tunnels, boreholes, and other geotechnical structures.
Read the full study in Mining Science and Technology (Russia):
π Ahrami O., Javaheri Koupaei H., Ahangari K. Determination of deformation modulus and characterization of anisotropic behavior of blocky rock masses. Mining Science and Technology (Russia). 2024;9(2):116β133. https://doi.org/10.17073/2500-0632-2023-08-143
π Subscribe to our Telegram channel: t.iss.one/MinSciTech
#InEnglish #MST #anisotropy #deformation #modulus #mass #rocks #loading #fracture #stiffness #strength #shear #resistance #stress #displacement #sliding #quartz #modeling #coefficient #index #blocks #deformations #material #surface #structure #boundary #experiment #geomechanics #JRC #UCS #GSI #simulation
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