Vasilyev D.L., Polyakov Yu.Е. Metod for determining the indices of physical and mechanical properties of outburst seams
- Details
- Parent Category: Geo-Technical Mechanics, 2017
- Category: Geo-Technical Mechanics, 2017, Issue 132
Geoteh. meh. 2017, 132, 138-148
METOD FOR DETERMINING THE INDICES OF PHYSICAL ANDMECHANICAL PROPERTIES OF OUTBURST SEAMS
1Vasilyev D.L., 1Polyakov Yu.Е.
1IGTM NAS of Ukraine
UDC 622.272.633:622.02:539.2/.8
Abstract. The article examined the indicators of physic and mechanical properties of the outbursthazardous coal seam, at their experimental studying, and by determining the limit of shear resistance against stratification and on stratification, the coefficient of internal friction of coal and contact friction between coal seam formation and rocks formation of the roof. For determine the above parameters by the developed method for determining the parameters of the physic and mechanical properties of the outburst-hazardous coal layers, all the work was carried out at the experimental stand. The method consists in determining the dependence of the shearing stress on the normal compressive load. Experiments are based on consideration of coal samples from the developed coal seams i3; нk2 , which are the mostoutburst-hazardouson PJSC «Krasnodonugol». Was found that the values of coefficient and angle of internal friction of coal samples from i3 coal seam of PJSC «Krasnodonugol» along stratification are μ=1,1 & ρ= 48°, perpendicular to stratification are μ=1,0 и ρ=45°,and the limit of resistance to shear along stratification are kn=0,3-0,4 MPa, perpendicular to the stratification are 1.4-1.8 MPa. For the formation нk2 along stratification and against stratification is μ=0,82 -0,85 & ρ= 39-40°, and the limit of resistance to shear along stratification is 0.5-0.6 MPa, perpendicular to the stratification are1,4-1,6 MPa.
Keywords: coefficient of external friction, slip line, frictional properties, shear resistance, contact friction, hydro-loosening.
REFERENCES
1. Xu, T., Tang, C.A., Yang, T.H., Zhu, W.C. and Liu, J. (2006), ―Numerical investigation of coal and gas outbursts in underground collieries‖, International Journal of Rock Mechanics and Mining Sciences, vol. 43, iss. 6, pp. 905-919.
2. Mineev, S.P. (2009), Svoystva gazonasyshchennogo uglya [Properties of gas-saturated coal], NMU, Dnepropetrovsk, Ukraine.
3. Fairhurst, C.E. and Hudson, J.A. (1999), ―Draft ISMR suggested method for the complete stress-strain curve for intact rock in uniaxial compression‖, International Journal of Rock Mechanics and Mining Sciences, vol. 36, iss. 3, pp. 279-289.
4. Kostandov, Yu.A. (2016), ―On the influence of contact conditions on the evaluation of limiting parameters, elastic module and the nature of fracture of compressible samples‖, Science Magazine «Physical and technical problems of minerals», Siberian branch of the RAND, pp.82-90.
5 Kostandov, Yu.A. and Zberovskiy, V.V. (2014), Metodika eksperimentalnogo opredeleniya uglov vneshnego i vnutrennego treniya obrazcov uglya iz vybrosoopasnykh plastov PAO ―Krasnodonugol [Methodology of experimental determination of the angles of external and internal friction of coal samples from outburst-hazardous layers of PJSC "Krasnodonugol"], V.I. Vernadsky Taurida National University, Simferopol, Ukraine.
6. Kostandov, Yu.A. (2012), Provedenie issledovaniy i opredelenie uglov treniya uglya «Shakhtoupravleniya «Molodogvardeyskoe»: Otchet o nauchno-issledovatelskoy rabote [Carrying out studies and determining the angles of coal friction Mine "Molodogvardeyskoye.": Report on the research work], Taurian National University, Simferopol, Ukraine.
7. Dyrda, V.I. and Vasilyev, D.L. (2016), Metodika eksperimentalnogo opredeleniya predela prochnosti sdvigu i ugla vnutrennego treniya gornykh porod [Methodology of experimental determination of the shear strength and the angle of internal friction of rocks], N.S. Polyakov Institute of Geotechnical Mechanics of the NAS of Ukraine, Dnepr, Ukraine.
8. Vasilev, D.L. (2014), ―Mathematical model for calculating the pressure load on the bottomhole part of coal seams‖, Scientific Collected Works of NMU, no. 45, pp. 189-194.
9. Vasilev, L.M., Tsepkov, K.V, Vasilev, D.L. and Kostandov, Yu.A., (2009), ―Analysis of the relationship between contact stresses in the compression of rocks‖, Geo-Technical Mechanics, no. 81, pp. 217-226.
10. Vasilev, D.L., Us, Yu. A., Kostandov, Yu.A. et al. (2010), ―Justification of methods for calculating contact stresses in the compression of rocks‖, Scientific Collected Works of NMU, no. 9-10, pp. 56-60.
About the authors
Vasilyev Dmitriy Leonidovich, Candidate of Technical Sciences (Ph.D.), Senior Researcher in Department of Elastomeric Component Mechanics in Mining Machines, N.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Sciences of Ukraine (IGTM, NASU), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .
Polyakov Yuriy Yevgenevich, Master of Science (M.S.), Junior Researcher in Department of Rock Breaking Problems, N.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Sciences of Ukraine (IGTM, NASU), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .
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