We present the articles of the fourth issue of scientific journal "Mining Science and Technologyβ (Russia) for 2024:
The study assessed the impact of water inflows on the strength characteristics of the rocks of the Lovozero rare-metal deposit developed by the Karnasurt mine. he data on water inflow into Karnasurt mine workings, which exploits two ore bodies of the Lovozero rare-metal deposit, are considered. Statistical processing of the data on water volumes collected by the mine over the latest 4 years was performed, with assessment of their changes during a calendar year. The quantitative indicators of the changes in the strength characteristics of rocks due to water saturation were determined. It was found that the water saturation led to a decrease in the rock strength by up to 10β20%, especially for compressive strength values.
For more information, see the article:
π Kalashnik A.I. Effect of water inflows on the strength characteristics of the Lovozero rare-metal deposit rocks. Mining Science and Technology (Russia). 2024;9(4):387-394. https://doi.org/10.17073/2500-0632-2023-09-160
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#Inenglish #MST #mine #extraction #waterinflows #rocks #pillars #properties #strength #watersaturation #rockbursthazard #Lovozeroraremetaldeposit #Karnasurt #metaldeposit
The study assessed the impact of water inflows on the strength characteristics of the rocks of the Lovozero rare-metal deposit developed by the Karnasurt mine. he data on water inflow into Karnasurt mine workings, which exploits two ore bodies of the Lovozero rare-metal deposit, are considered. Statistical processing of the data on water volumes collected by the mine over the latest 4 years was performed, with assessment of their changes during a calendar year. The quantitative indicators of the changes in the strength characteristics of rocks due to water saturation were determined. It was found that the water saturation led to a decrease in the rock strength by up to 10β20%, especially for compressive strength values.
For more information, see the article:
π Kalashnik A.I. Effect of water inflows on the strength characteristics of the Lovozero rare-metal deposit rocks. Mining Science and Technology (Russia). 2024;9(4):387-394. https://doi.org/10.17073/2500-0632-2023-09-160
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πt.iss.one/MinSciTechπ
#Inenglish #MST #mine #extraction #waterinflows #rocks #pillars #properties #strength #watersaturation #rockbursthazard #Lovozeroraremetaldeposit #Karnasurt #metaldeposit
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We present the articles of the first issue of scientific journal "Mining Science and Technologyβ (Russia) for 2025:
Scientists conducted laboratory tests according to the International Society for Rock Mechanics (ISRM) methodology to investigate fracture toughness at interfaces between gypsum stone and sand-cement mortar. The fracture toughness coefficient K_IC was determined using cylindrical specimens 40 mm in diameter and 150 mm long with a V-shaped notch, tested in three-point bending. Results showed that the average KIC value for the rock-concrete interface was only 0.323 MPaΓβm β 4 times lower than for pure gypsum (1.327 MPaΓβm) and 2.5 times lower than for concrete specimens (0.858 MPaΓβm). Interestingly, the formation of a calibrated fracture during testing caused a 30% increase in the internal mechanical loss factor Qβ»ΒΉ, revealing new possibilities for fracture toughness evaluation using resonance methods. These findings have important practical implications for the design, operation and monitoring of industrial mining facilities containing rock-concrete interfaces.
For more information, see the article:
π Voznesenskii Π.S., Ushakov E.I., Kutkin Ya.O. Fracture toughness of rock-concrete interfaces and its prediction based on acoustic properties. Mining Science and Technology (Russia). 2025;10(1):5-14. https://doi.org/10.17073/2500-0632-2024-10-316
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#InEnglish #MST #rocks #concrete #gypsum #flintstone #interface #properties #fracturetoughness #acoustics #study #testing #acousticmeasurements #elasticwaves #velocity #losses #prediction #strain #rockmechanics #geophysics #ISRM #KIC #Qfactor #monitoring #strength #failure #cement #science #technology #RSFgrant #nondestructivetesting #resonancemethod #mining #engineeringsolutions
Scientists conducted laboratory tests according to the International Society for Rock Mechanics (ISRM) methodology to investigate fracture toughness at interfaces between gypsum stone and sand-cement mortar. The fracture toughness coefficient K_IC was determined using cylindrical specimens 40 mm in diameter and 150 mm long with a V-shaped notch, tested in three-point bending. Results showed that the average KIC value for the rock-concrete interface was only 0.323 MPaΓβm β 4 times lower than for pure gypsum (1.327 MPaΓβm) and 2.5 times lower than for concrete specimens (0.858 MPaΓβm). Interestingly, the formation of a calibrated fracture during testing caused a 30% increase in the internal mechanical loss factor Qβ»ΒΉ, revealing new possibilities for fracture toughness evaluation using resonance methods. These findings have important practical implications for the design, operation and monitoring of industrial mining facilities containing rock-concrete interfaces.
For more information, see the article:
π Voznesenskii Π.S., Ushakov E.I., Kutkin Ya.O. Fracture toughness of rock-concrete interfaces and its prediction based on acoustic properties. Mining Science and Technology (Russia). 2025;10(1):5-14. https://doi.org/10.17073/2500-0632-2024-10-316
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π t.iss.one/MinSciTech π
#InEnglish #MST #rocks #concrete #gypsum #flintstone #interface #properties #fracturetoughness #acoustics #study #testing #acousticmeasurements #elasticwaves #velocity #losses #prediction #strain #rockmechanics #geophysics #ISRM #KIC #Qfactor #monitoring #strength #failure #cement #science #technology #RSFgrant #nondestructivetesting #resonancemethod #mining #engineeringsolutions
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We present the articles of the first issue of scientific journal "Mining Science and Technologyβ (Russia) for 2025:
Scientists investigated a novel method for reinforcing sandy soils using polyurethane compounds. During construction of engineering structures and mineral deposit development, strengthening loose rock formations often becomes necessary, yet conventional polymer reinforcement techniques provide insufficient strength. Experimental studies introduced a two-solution treatment technology: initial mixing of sand with a slow-reacting highly elastic compound followed by addition of 5% rapid-curing single-component resin. Triaxial compression tests demonstrated that this approach creates cured polymer aggregates that bind mineral grains without complete void filling, increasing sand strength by 5-fold. The resulting geomaterial exhibits superior deformation resistance under axial stress, while maintaining strength independence from rapid-curing additives when the resin-to-rock volume ratio exceeds 0.3. The research confirms that the dual-solution method significantly enhances soil stability even with minimal polymer consumption, offering important practical applications for construction and mining operations.
For more information, see the article:
π Shilova T.V., Serdyukov S.V., Drobchik A.N. Experimental research of stress-strain properties of sandy soil when strengthened with polyurethane compounds. Mining Science and Technology (Russia). 2025;10(1):15-24. https://doi.org/10.17073/2500-0632-2024-08-303
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#InEnglish #MST #soil #sand #properties #strength #strengthening #technology #treatment #polyurethane #resin #geomaterial #testing #triaxial #compression #failure #strain #geotech #engineering #construction #polymer #stabilization #research #experiment #materialscience #groundimprovement #geomechanics #durability #elasticity #SEM #microstructure #geotechnical #civilengineering
Scientists investigated a novel method for reinforcing sandy soils using polyurethane compounds. During construction of engineering structures and mineral deposit development, strengthening loose rock formations often becomes necessary, yet conventional polymer reinforcement techniques provide insufficient strength. Experimental studies introduced a two-solution treatment technology: initial mixing of sand with a slow-reacting highly elastic compound followed by addition of 5% rapid-curing single-component resin. Triaxial compression tests demonstrated that this approach creates cured polymer aggregates that bind mineral grains without complete void filling, increasing sand strength by 5-fold. The resulting geomaterial exhibits superior deformation resistance under axial stress, while maintaining strength independence from rapid-curing additives when the resin-to-rock volume ratio exceeds 0.3. The research confirms that the dual-solution method significantly enhances soil stability even with minimal polymer consumption, offering important practical applications for construction and mining operations.
For more information, see the article:
π Shilova T.V., Serdyukov S.V., Drobchik A.N. Experimental research of stress-strain properties of sandy soil when strengthened with polyurethane compounds. Mining Science and Technology (Russia). 2025;10(1):15-24. https://doi.org/10.17073/2500-0632-2024-08-303
Subscribe to our Telegram channel:
π t.iss.one/MinSciTech π
#InEnglish #MST #soil #sand #properties #strength #strengthening #technology #treatment #polyurethane #resin #geomaterial #testing #triaxial #compression #failure #strain #geotech #engineering #construction #polymer #stabilization #research #experiment #materialscience #groundimprovement #geomechanics #durability #elasticity #SEM #microstructure #geotechnical #civilengineering
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