Sheiko A.V. Validation of support parameters for the main workings

Details

Parent Category: Geo-Technical Mechanics, 2020

Category: Geo-Technical Mechanics, 2020, Issue 150

Geoteh. meh. 2020, 150, 167-175

https://doi.org/10.15407/geotm2020.150.167

 

VALIDATION OF SUPPORT PARAMETERS FOR THE MAIN WORKINGS

¹Sheiko A.V.

¹Institute of Geotechnical Mechanics named by N. Poliakov of National Academy of Science of  Ukraine

UDC 622.28;622.272.3

Language: Russian

Annotation.

For the ground of parameters of supports of the capital mine workings erected in slightly-metamorphized rocks, conformities to law of change of parameters of different parties of displays of mine pressure are studied in the mіne workings. The metal arch and metal-concrete supports with or without hardening of rocks are used for providing stability of the workings constructed in weakly metamorphosed rocks. The support design parameters are justified by regulatory methods, which are unacceptable for the conditions of weakly metamorphosed rocks. In order to justify parameters of the working supports constructed in slightly metamorphosed rocks, regularities of the manifestation of the following main rock pressure features were studied: buckling of the roof and floor rocks, landslides of roof rocks, reactive resistance of supports to the shifting rocks, with and without consideration of the rock hardening with water-cement mortars and anchors. Interrelations and proportionalities of geomechanical and technical parameters of the rock-support systems were established. Based on the provisions of continuum mechanics and experimentally established patterns, an empirical-analytical method was developed for determining a bearing capacity of the zone of inelastic deformations, with and without hardening of the rock contour. Through the engineering research, a mathematical model of the arch frame bearing capacity was developed, which took into account a complex of the type of special profile, cross-sectional area of the working, rigidity of the frame and type of load on the arch. Influence of the time of the rock contour strengthening on geomechanical parameters of the rock support systems was experimentally studied, and it is for the first time when a theoretical conclusion about the possibility of ensuring stability of the workings by using the bearing capacity of the hardened contour without the use of traditional supports as supporting structures is confirmed. Loads on the working supports were validated with taking into account the key influencing natural and technical factors. On the basis of the research results, the following was developed: standard design and technical specifications for yielding arch and tent supports and special mine profiles SVP, as well as new rock supports.

Key words:

geomechanics, anchor, grouting, rock concrete.

References

1. SNiP II-94-80. Podzemnye gornye vyrabotki. Rukovodstvo po proektirovaniiu podzemnykh gornykh vyrabotok I raschetu krepi  [SNiP II-94-80. Underground mine workings. Fasten guidance on planning of the underground mine workings and calculation of support] (1983), Stroiizdat, Moscow, SU.

2. Usachenko B.M., Shmigol A.V. and Kirichenko V.Ya. (1982), Okhrana podgotovitelnykh vyrabotok gkubokikh gorizontov shakht Zapadnogo Donbassa. Obzor [Guard of the preparatory making of deep horizons of mines of Western Donbass. Review], TsNIEIUgol, Moscow, RU.

3. Tipovoi proekt NTR 2298-39. Secheniia gornykh vyrabotok dlia slozhnykh gorno-geologicheskikh uslovii shakht Zapadnogo Donbassa [Model project NTR 2998-139. Sections of the mine workings for the difficult mine-geological terms of mines of Western Donbass] (1973), Tsentrogiproshakht, Moscow, SU.

4. Sheiko, А.V. (2018), “Geo-Mechanical bases of  Planning of the kapital workings, erected in weakmetamorpleimining rocks”, The scientific Method, n0. 18, pp. 48-53.

About the author

Sheiko Anatolii Vasyliiovych, Master of Science, Chief Technologist in Department of Underground Coal Mining, Institute of Geotechnical Mechanics named by N. Poliakov of National Academy of Sciences of Ukraine, (IGTM NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

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