Numerical and Experimental Case Study of Blasting Works Effect

Papán, Daniel; Valašková, Veronika; Drusa, Marián

doi:10.1088/1755-1315/44/5/052052

Cited by 9 publications

(5 citation statements)

References 3 publications

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“…The incessant induced impact, caused by drilling and blasting [ 10 ] and extensive exposed surfaces, causes seismic activity in the mining regions [ 11 ]. Vibrations and induced earthquakes of up to magnitude 5 are recorded at Russian and foreign mines developing deposits of water-soluble ores [ 12 , 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Creation of a Nanomodified Backfill Based on the Waste from Enrichment of Water-Soluble Ores

et al. 2022

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The paper analyzes losses during the development of low-value water-soluble ore deposits. The importance of development systems with backfill is shown. The use of industrial wastes of water-soluble ores to replace specially produced inert components in the preparation of backfill seems to be a good way to utilize them. The aim of the work was to create a fill mass with improved strength properties based on industrial wastes of water-soluble ores activated with a nanomodifying material. The characteristics (chemical and granulometric compositions) of an aggregate of the backfill based on the waste from enrichment of water-soluble ores are given. The validation of the hardening mixture compositions for various mining systems was carried out considering: the specified strength, the time of the artificial mass erection, the time to achieve the required strength properties of the material, which determine the possible intensity of the mining operations; method of transporting the backfill. The expediency of using a multilayer fulleroid nanomodifier astralene as a nanomodifying additive has been proved. The effect of the backfill activation with a nanomodifying additive, astralene, on the structural changes of halite wastes from the halurgic enrichment of water-soluble ores (potash) was investigated. To study the strength properties of the fill mass, the comparative analytical method was used. The strength properties of the backfill were measured in standard test periods, taking into account the intensity of hardening of the backfill material (after 7, 14, 28, 60, 90 days). To obtain reliable results, 10 backfill samples were tested at each of the scheduled dates. The shape and chemical composition of crystalline new forms were studied. Studies were performed using X-ray phase analysis and scanning electron microscopy. As a result of uniaxial compression of hardening backfill samples, the dependence of the ultimate strength on the astralene content and the hardening time were established. It has been experimentally proved that the use of a nanomodifying additive, astralene, in the backfill allows an increase in the strength properties of the created artificial mass by 1.76–2.36 times while reducing binder consumption.

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Section: Introductionmentioning

confidence: 99%

Creation of a Nanomodified Backfill Based on the Waste from Enrichment of Water-Soluble Ores

et al. 2022

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“…This practical research is currently being continued and the correlation of in situ results, numerical calculations, analytical assumptions, and actual full-scale experiment is very interesting and will soon also be presented in a scientific publication. The presented problem has also been addressed by experts in Ljubljana, Slovenia; their results are found in [28][29][30][31][32][33][34].…”

Section: Discussionmentioning

confidence: 99%

Experimental Simulation of Deformation Effect Propagation Due to Explosion on the Surface of a Small-Scale Model

Papán,

Brozová,

Papánová

2023

Buildings

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The use of small-scale models is an important area of research today. An investigation is conducted on the response of a small-scale model’s vibrating surface. For this model, a small-scale surface explosion is used for loading. According to the article, the methodology includes procedures, model development, the explosive materials used, measurement and evaluation methods, software, and the technique used. Signal processing and response evaluation rely on a scientific method—the backward Fourier-transform principle—for frequency filtering. In this study, the simulation results are used to confirm the basic physical properties of the viscoelastic system. It is primarily investigated whether wave processes are confirmed on the new material. In terms of single wave propagation, the results summarize the characteristics of these waves (attenuation, velocity of propagation, etc.). Conclusions are targeted at the possibility of correlating three types of results: small-scale simulations, numerical simulations, and a real full-scale experiment.

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“…It can therefore be noted that the problem of the impact of vibrations upon existing buildings and structures in the neighbourhood has already been defined. Investors increasingly commission monitoring and vibration measurements in the context of neighbouring structures security [6][7][8][9][10]. However, their harmful impact (and guidelines) upon facilities being put up, and in particular vibrations transferred to concrete in boarding, already in the phase of its bonding while adhesion to reinforcing steel is being built up has not been investigated, as demonstrated in [11].…”

Section: Motivation and Scope Of The Studymentioning

confidence: 99%

Range of dynamic impact of geotechnical works on reinforced concrete structures

2019

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Impact of geotechnical works related to plunging piles in the ground and modification of the condition of the soil foundation for concrete in the early stage of its bonding, and influence on adhesion of reinforcing steel to concrete can determinate the target capacity of a reinforced concrete structure. Impact of vibrations testing on bond strength is only possible on real designs or models subjected to dynamic impact. The paper presents mechanisms of adherence reduction caused by relative displacement of reinforcing steel and concrete. Moreover, dynamic influences (frequencies and vibration velocities) measured on structures within and around construction sites, where geotechnical works were carried out were also compared. Data obtained after their statistical analysis might become the basis for modelling an experiment.

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Numerical and Experimental Case Study of Blasting Works Effect

Cited by 9 publications

References 3 publications

Creation of a Nanomodified Backfill Based on the Waste from Enrichment of Water-Soluble Ores

Creation of a Nanomodified Backfill Based on the Waste from Enrichment of Water-Soluble Ores

Experimental Simulation of Deformation Effect Propagation Due to Explosion on the Surface of a Small-Scale Model

Range of dynamic impact of geotechnical works on reinforced concrete structures

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