Geomechanical model of underground mine. Part II. Application

Biryuchev, I. V.; Макаров, А. Б.; Usov, A. A.

doi:10.17580/gzh.2020.02.04

Cited by 2 publications

(1 citation statement)

References 30 publications

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“…The relevance of creating geomechanical models is beyond dispute, since solving real geomechanical problems requires more than having a prepared classification of rock masses and knowing the patterns of stress distribution in the mining system elements. It is necessary to have a clear understanding of the mutual spatial occurrence of certain rock types with the corresponding deformation-strength properties [9], [10] In other words, to solve geomechanical problems, it is necessary to develop various situation models. This methodological approach is gradually gaining general recognition [11].…”

Section: Introductionmentioning

confidence: 99%

Rock mass management to ensure safe deposit development based on comprehensive research within the framework of the geomechanical model development

Sedina¹,

Altayeva²,

Shamganova³

et al. 2022

Min. miner. depos.

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Purpose. To create and study a three-dimensional geomechanical model in order to determine the parameters of the open-pit walls and benches, ensuring safe and economically feasible mining, as well as predicting unstable zones within the open pit. Methods. A comprehensive methodological approach is used, including a systematic analysis of scientific, normative and methodological literature; analyzing the results of previously performed studies on the object; engineering-geological surveys in the near-edge rock mass of the Kurzhunkul’ deposit; laboratory testing of rock strength properties; determining the rock mass rating according to the MRMR classification; kinematic analysis of bench faces; calculating the stability of the Kurzhunkul’ deposit final boundary using the limit equilibrium method; numerical modeling of the rock mass stress-strain state at the Kurzhunkul’ deposit using the finite element method. Findings. The paper represents the results of data collection and analysis for the development of a geomechanical model of an operating iron-ore open pit in the Republic of Kazakhstan. Comprehensive geomechanical studies to substantiate the optimal parameters of the Kurzhunkul’ deposit walls and benches on the limiting contour, as well as calculations to determine the degree of the open-pit walls and benches stability have been performed. Based on the results of studying the geological-structural configuration of the deposit, as well the mathematical modeling data of stability and acting stresses, subsequently entered into a unified digital database, weakened zones have been identified. Originality. For the first time, the geomechanical model has been created for the conditions of the Kurzhunkul’ deposit, which makes it possible to combine in one database all the parameters that affect the safety of mining operations. The model takes into account structural disturbances of the rock mass that have an adverse impact on stability. Practical implications. The developed model gives a visual representation of the rock mass state at various sites of the deposit, simplifies the selection of design sections for stability calculations, facilitates the choice of optimal technical solutions and analysis, especially for complex geological structures with multiple geotechnical or geological units with different texturing and inclination.

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Section: Introductionmentioning

confidence: 99%

Rock mass management to ensure safe deposit development based on comprehensive research within the framework of the geomechanical model development

Sedina¹,

Altayeva²,

Shamganova³

et al. 2022

Min. miner. depos.

View full text Add to dashboard Cite

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Rockburst hazard potential assessment of rocks of the Khibiny massif deposits according to the Kaiser criterion

Kuznetcov,

Kondrashov

2023

Vestnik MGTU

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The mining and geological conditions in the mines worsen due to changes in the stress-strain state of rock masses and their structural disturbance when mining goes to great depths. Under such conditions, it is necessary to assess the impact hazard of ores and rocks that make up the mined deposits. For the prompt implementation of such an assessment, it is proposed to use the Kaiser criterion consisting in the analysis of experimental data obtained on rock samples. The paper presents the results of laboratory testing of rock samples from the deposits of the Khibiny massif under uniaxial compression and tension. The values of their brittleness coefficients have been determined. The possibility of using the Kaiser criterion for a preliminary assessment of rock burst hazard potential has been shown. It has been established that spotty-trachytoid melteigite and trachytoid ijolite-melteigite have a high potential for impact hazard, while spotted apatite-nepheline ore does not have such a potential. A comparison has been made of the obtained results of rockburst hazard assessment of hard rocks from the Khibiny massif deposits according to the Kaiser criterion, as well as the criterion of the Mining Institute of the KSC RAS and the criterion of A. N. Stavrogin. It can be noted that the Kaiser criterion makes it quite easy to carry out a preliminary assessment of rock burst hazard based on the results of testing samples on standard presses. However, to increase the degree of reliability of the data obtained, they must be certified according to the criterion of the Mining Institute of the KSC RAS or the criterion of A. N. Stavrogin.

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Geomechanical model of underground mine. Part II. Application

Cited by 2 publications

References 30 publications

Rock mass management to ensure safe deposit development based on comprehensive research within the framework of the geomechanical model development

Rock mass management to ensure safe deposit development based on comprehensive research within the framework of the geomechanical model development

Rockburst hazard potential assessment of rocks of the Khibiny massif deposits according to the Kaiser criterion

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