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Загальна кількість знайдених документів : 2 Представлено документи з 1 до 2 |
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| 1. | 
Tereschuk R. Parameters of single anchor effect area in homogeneous border rock mass [Електронний ресурс] / R. Tereschuk, O. Hryhoriev, V. Tikhonenko // Вісник Криворізького національного університету. - 2016. - Вип. 41. - С. 22-25. - Режим доступу: http://nbuv.gov.ua/UJRN/Vktu_2016_41_7 Analysis of basic methods to increase stability of mine workings is carried out. Objective of the paper is to study and determine area of single anchor effect on border mass at different anchor length, mining depth and physical and mechanical characteristics of enclosing rocks. Results of mathematical simulation of mine working located in homogeneous rock mass and fixed by single anchor are given. The research was based on the data of surveying regularities in changes of border mass strain-stress behaviour and amounted to the determining of expected displacement of natural mine working contour. Dependences of changes in single anchor effecting border rock mass upon anchor length, the working depth, and physical and mathematical characteristics of rock are obtained. Rational dimensions of single anchor effect area on border mass upon the anchor length, the mine working depth and physical and mathematical characteristics of rock are determined. Efficient anchor length for the mining and geological conditions is defined. Further research will be focused on studying effect of single anchor in heterogeneous border rock mass. | ||
| 2. | 
Babets D. V. Impact of water saturation effect on sedimentary rocks strength properties [Електронний ресурс] / D. V. Babets, O. S. Kovrov, S. K. Moldabayev, R. M. Tereschuk, D. O. Sosna // Науковий вісник Національного гірничого університету. - 2020. - № 4. - С. 76-81. - Режим доступу: http://nbuv.gov.ua/UJRN/Nvngu_2020_4_13 Purpose. To identify some regularities of reduction in strength of loamy soils and weak sedimentary rocks that are typical for Western Donbas by water saturation condition for assessment of their stability in geotechnologies and forecasting geohazards. Methodology. The paper presents two techniques of experimental testing for sedimentary rocks that allow determining their strength properties under the condition of water saturation. Rock samples of sandstones, mudstones, and siltstones after artificial saturation with mine water were tested on a KL 200/CE hydraulic press to determine the uniaxial compressive strength value. The method for determining the physical-mechanical properties for soft loamy rock samples under different water saturation using PS-10 single-plane shearing tester was used. Findings. Based on the results of compression tests, strength characteristics are obtained for samples of sandstones, mudstones, and siltstones, in particular, the values of uniaxial compression strength at various degrees of water saturation. Statistical processing of the obtained experimental data was applied. A relative variation in the values of compressive strength was established for various rates of water saturation; regression dependences of the strength loss for sedimentary rocks depending on the water content in rock samples were plotted. The values of cohesion C and the angle of internal friction <$Ephi> for soft loamy rocks are obtained depending on water saturation. Originality. It was established that the relative variation of the uniaxial compressive strength increases with increasing water content in sedimentary rock samples. The most intense decrease in the strength of sandstones, mudstones, and siltstones samples occurs with increasing water content from 1 to 2 %. In a water-saturated state, the strength of some sedimentary rocks under conditions of Western Donbas decreases by 1,5 - 2,5 times. The critical values of the strength properties of soft loamy rocks are established depending on water saturation, at which deformation processes are initiated: for light yellow loess loams - C = 17 kPa and <$E phi~=~14 symbol Р>; for yellow-brown dense loams - C = 29 kPa and <$E phi~=~17 symbol Р>. Practical value. Correction coefficients for water saturation were obtained to determine the estimated physical and mechanical characteristics of sedimentary rocks of Western Donbas, which allows predicting geomechanical processes in the rock mass and determining the parameters of geomechanical systems. The obtained values of cohesion and angle of internal friction for loamy rocks depending on water saturation allow predicting stable parameters of open-pit slopes and dumps. | ||
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