Forecast of the mine workings destruction risks by the radiometric control method

Slashchov, Ihor; Bielikov, A. S.; Kulbach, Andrii; Slashchova, Olena

doi:10.1088/1755-1315/1156/1/012033

Cited by 3 publications

(2 citation statements)

References 15 publications

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“…Poliakov Institute of Geotechnical Mechanics NASU, in which an analytical description of the stress-strain state of the rock massif near the mine longwall [11][12][13] is given, including taking into account: free gas in the rock formation, water saturation, cracks and geological disturbances [13,14], extreme deformation of rocks [11,15]. A model has been developed for the formation of pore-fractured area in sandstones under the influence of natural and technogenic factors [15,18], which is verified by numerous experiments in mines, as well as for the underground geotechnical systems of geomechanical monitoring [19,20] and radiometric control methods [19]. At the same time, the interconnected problems of the rocks massif destruction during mining and forecasting gas emissions in the mine roadways are extremely difficult and do not have a final solution.…”

Section: Ways To Solve the Problem Of Reducing Methane Emissions Into...mentioning

confidence: 99%

Regularities of rocks zonal disintegration and methane emissions periodicity in mine roadways

Slashchov,

Bielikov,

Slashchova

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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The article presents the results of studies on the establishment of stable relationships between methane emissions into degassing wells and their spatial location, stress-strain state of rock massif and mining operations process. Vibroacoustic and electrometric of mine control methods have been used to establish zoning and alternation of fractured zones in the rock massif during mining operations. Using the finite element method, zones of different permeability in the roof above the longwall face were determined, and a qualitative transition from compressive deformations to tensile deformations was revealed. Based on data from mine experiments at 157 degassing wells, patterns of repeatability of rocks zonal disintegration and periodicity of gas emissions into mine roadways depending on the distance to the moving longwall face have been determined for the first time. It has been established that the concentration of methane gas in a wells with distance from the longwall face changes according to a damped quasi-periodic dependence with recombinant changes in stress-strain states. For wells aimed at the goafs, the period of the quasi-periodic function increases by 40%, the amplitude decreases to 30%. The obtained dependencies make it possible to increase the efficiency of degassing.

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Section: Ways To Solve the Problem Of Reducing Methane Emissions Into...mentioning

confidence: 99%

Regularities of rocks zonal disintegration and methane emissions periodicity in mine roadways

Slashchov,

Bielikov,

Slashchova

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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“…The use of risk control technologies at mining enterprises is hampered by insufficient development of systems for automatic monitoring and control of mining processes [2]. The imperfection of the methods for analyzing and assessing risks caused by hazardous factors arising in the production environment has a negative impact [3]. Algorithms for determining the stress-strain states of the rock massifs require further development [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Forecasting the risks of underground roadway stability loss based on mine research data

Slashchova,

Kohtieva,

Rahimov

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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The article presents results of the research on forecasting the risks of underground roadway stability loss based on the results of mine monitoring. The method is used for safety control in the process of conducting mining operations and re-exploitation of roadways as industrial facilities. The risk assessment was carried out with allowance for spread of physical and mechanical parameters of rocks; this approach is confirmed by procession of data of more than 1000 experiments. Mining-and-technical factors and their negative impact on the rock destruction were identified and systematized. The structure of risk control in a geotechnical system “rock massif - roadway” was substantiated. The method for forecasting the risks of underground roadway destruction based on the results of the mine research was further developed. The method differs from the well-known ones by taking into account the dominant influencing factors, variations of values and standard deviations of the forecasted risks of roadway functionality loss and criteria for violation of its technological air gaps at a certain point in time. This makes it possible to assess the degree of danger of mine roadway stability loss and to undertake response measures more reasonably.

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Justification of the Dynamics of Extra-Project Loads on Building Structures

Nalysko,

Makhinko,

Sopilniak

et al. 2024

Advances in Science and Technology

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The paper analyzes the forms of impact of non-design loads from shock air waves on building structures. The problem of forecasting the dynamics of the explosive load on a building structure (for example, the covering of a buried structure) is solved by the simultaneous solution of the equation of the spatial distribution of excess pressure in the front of a shock air wave and the dependence of the time of its action on the speed of its front. Since the speed of the shock air wave is constantly changing, the equation of the time of the wave action has a differential form, and its solution is established on the assumption that the simultaneous action of the wave on the surface of the building structure occurs on an area that is limited by the width of the shock wave front. On the basis of this, a grapho-analytic technique for determining the spatio-temporal dependence of the change in excess pressure in the plane of the building structure at the time of impact of the shock wave was developed. This dependence is established in the form of a table or graph, which is a loading curve.

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Forecast of the mine workings destruction risks by the radiometric control method

Cited by 3 publications

References 15 publications

Regularities of rocks zonal disintegration and methane emissions periodicity in mine roadways

Regularities of rocks zonal disintegration and methane emissions periodicity in mine roadways

Forecasting the risks of underground roadway stability loss based on mine research data

Justification of the Dynamics of Extra-Project Loads on Building Structures

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