Sergiyenko L.V., Gladkaya E.V., Molodetskiy A.V. Analysis of coal breaking mechanism under the conditions modelling stress-and-strain state of an accompanying-bed while in of mining work

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Parent Category: Geo-Technical Mechanics, 2015

Category: Geo-Technical Mechanics, 2015, Issue 124

 

Geoteh. meh. 2015, 124, 106-114

ANALYSIS OF COAL BREAKING MECHANISM UNDER THE CONDITIONS MODELLING STRESS-AND-STRAIN STATE OF AN ACCOMPANYING-BED WHILE IN OF MINING WORK

¹Sergiyenko L.V., ¹Gladkaya E.V., ¹Molodetskiy A.V.

¹IPMP NAS of Ukraine

UDC 622.236: 539.375

Abstract. Experimental data have been to analyze both nature and mechanism of coal breaking in the context of modeling stress-and-strain state of a disturbed accompanying bed while mining. A plant of inequicomponent three-axis compression (PITAC) allows development of independent voltages (being similar in their value and direction within rock mass) in three mutually perpendicu-lar directions has been used for mechanical tests of coal with various disturbance degrees. It has been determined that within a three-dimensional field of compressing stresses irrespectively of level and type of stress state as well as a degree of coal disturbance deformations are shaped within an accompanying bed in the process of coal-bearing mass unloading. Ratio of the deformations results in the development of the type of deformation state being close to generalized shift.

Key-words: coal, mechanical characteristics, type of stress state.

 

REFERENCES

1. Bokiiy, B.V. and Kasimov, O.I. (2005), “Prospect of extraction of methane from technogenic congestions”, Coal of Ukraine, № 5, pp. 17 − 21.

2. Abramov, F.A., Gretsinger, B.E., Sobolevsky, V.V. [and others] (1972), Aerogazodinamika vyemochnogo uchastka [Aerogasdynamics ofworking site], Naukova Dumka, Kiev, SU.

3. Klochko, I.I., Lobkov, N.I., Sergienko, I.A. and Sergienko, L.V. (2010), “The influence of motions of breeds of a roof on gas emission from goaf ”, Physical and technical problems of mining, no. 13, pp. 103 − 108.

4. Norel, B. K. (1982), Izmenenie mekhanicheskoy prochnosti ugolnogo plasta v massive [The change in the mechanical strength of the coal seam in the array], Nauka, Moscow, SU.

5. Alekseev, A.D. (2010), Fizika uglya i gornykh protsessov [Physics of coal and mining processes], Naukova Dumka, Kiev, UA.

6. Alekseev, A.D., Revva, V.N. and Ryazantsev, N.A. (1989), Razrusheniye gornykh porod v obyemnom pole szhimayushchikh napryazheniy [Destruction of rocks in the volume field of compressive stresses], Naukova Dumka, Kiev, SU.

7. Alekseev, A.D. and Nedodaev, N.V. ( 1982), Predelnoye sostoyaniye gornykh porod [Limit state of rocks, Naukova Dumka, Kiev, SU.

8. Cherepanov, G. P. (1974), Mekhanika khrupkogo razrusheniya [Mechanics of brittle fracture], Nedra, Moscow, SU.

 

About the authors

Sergienko Liana V., Master of Sciences, junior Researcher in the department of control the state massif, Institute of Physics of Mining Processes the National Academy of Sciences of Ukraine (NASU IPhMP), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Gladkaya Elena V., Ph.D., Candidate of technical Science (Ph.D.), Senior Researcher, Performing duties of Head of Department of control the state massif , Institute of Physics of Mining Processes the National Academy of Sciences of Ukraine (NASU IPhMP), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Molodetskyy Andrey V., Ph.D., Candidate of technical Science (Ph.D.), Researcher in the department of control the state massif , Institute of Physics of Mining Processes the National Academy of Sciences of Ukraine (NASU IPhMP), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

 

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