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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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
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
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Determination of deformation modulus and characterization of anisotropic behavior of blocky rock masses | Ahrami | Mining Scienceβ¦
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How to Improve Block Stone Quality with Blasting Technology?
The extraction of block stone is a critical process in the construction materials industry, where maintaining the integrity of the material for further use is paramount. The key challenge lies in minimizing induced fracturing and surface roughness of the blocks.
πΉ Key Aspects of the Technology:
βοΈ Stress wave interaction β plays a decisive role in forming the main rupture between blastholes.
βοΈ Optimal charge parameters β blasthole spacing, blast product pressure, and linear charge density influence the zone of induced fracturing.
βοΈ Orientation of the rupture plane β aligning it with natural fractures in the rock mass increases the yield of high-quality blocks.
πΉ Research Findings:
βοΈNumerical modeling confirmed that adjusting charge parameters localizes the fracture zone.
βοΈReducing blasthole spacing while increasing charge size within limits ensures directional splitting.
For more information, see the article:
π Kovalevsky V.N., Mysin A.V., Sushkova V.I. Theoretical aspects of block stone blasting method. Mining Science and Technology (Russia). 2024;9(2):97-104. https://doi.org/10.17073/2500-0632-2023-12-187
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π t.iss.one/MinSciTech π
#InEnglish #MST #BlockRockMass #DrillingAndBlasting #DirectedFlow #ChargeDesign #BlastPulse #BlastPressure #StressDiagrams #DynamicStrength #Roughness #InducedFracturing #Stone #Blast #Charge #Mass #Cracks #Rock #Pressure #Strength #Granite #Tech
The extraction of block stone is a critical process in the construction materials industry, where maintaining the integrity of the material for further use is paramount. The key challenge lies in minimizing induced fracturing and surface roughness of the blocks.
πΉ Key Aspects of the Technology:
βοΈ Stress wave interaction β plays a decisive role in forming the main rupture between blastholes.
βοΈ Optimal charge parameters β blasthole spacing, blast product pressure, and linear charge density influence the zone of induced fracturing.
βοΈ Orientation of the rupture plane β aligning it with natural fractures in the rock mass increases the yield of high-quality blocks.
πΉ Research Findings:
βοΈNumerical modeling confirmed that adjusting charge parameters localizes the fracture zone.
βοΈReducing blasthole spacing while increasing charge size within limits ensures directional splitting.
For more information, see the article:
π Kovalevsky V.N., Mysin A.V., Sushkova V.I. Theoretical aspects of block stone blasting method. Mining Science and Technology (Russia). 2024;9(2):97-104. https://doi.org/10.17073/2500-0632-2023-12-187
Subscribe to our Telegram channel:
π t.iss.one/MinSciTech π
#InEnglish #MST #BlockRockMass #DrillingAndBlasting #DirectedFlow #ChargeDesign #BlastPulse #BlastPressure #StressDiagrams #DynamicStrength #Roughness #InducedFracturing #Stone #Blast #Charge #Mass #Cracks #Rock #Pressure #Strength #Granite #Tech
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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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