Increasing stability of underground mine workings by forming new geotechnical properties of adjoining layers via roller compaction
V. Kravets1, S. Zaychenko2, G. Gayko1
1Department of Geobuilding and Mining Technologies, National Technical University of Ukraine “Kyiv Polytechnic Institute”, Kyiv, Ukraine
2Department of Electromechanics Equipment Productions, National Technical University of Ukraine “Kyiv Polytechnic Institute”, Kyiv, Ukraine
Min. miner. depos. 2016, 10(1):44-49
Full text (PDF)
Purpose. To create a model reproducing the process of forming geotechnical properties of the rock massif adjoining circuit of underground excavation by roller compaction method incorporating hardening and creating the zone of slow plastic deformation.
Methods. Modelling the main technological parameters of manufacturing process as for adjoining circuit of the tunnel: distribution of normal pressures and heights of the core seal depending on the main strength and deformation properties of rock massif, geometry and characteristics of the contact area of roller working body with the working medium.
Findings. The choice of the computational model simulating the formation of adjoining mountain contour properties by roller method has been justified taking into account the processes caused by soil deformation: appearance of elastic and plastic deformation, change of soil characteristics, formation of compaction core. The main stages and parameters interrelations in modelling the processing of the tunnel adjoining zone are shown.
Originality. Scientific novelty is referred to the development of a method to analyze contact interaction of the roller working body of a molding machine with the massif, considering changes in the process of the treated medium physical and mechanical properties stabilization, with the aim to predict the required stress and depth of the formed layer.
Practical implications. The research allowed to infer theoretical fundamentals for the formation of geotechnical properties inherent to the adjoining contour of underground excavation by roller method, taking into account peculiarities of soil deformation and contact interaction of the working body with the environment which allows to improve the tunnel construction technology by strengthening the carrying capacity of the marginal massif. The obtained results are instrumental in determining parameters of the elastic and plastic deformations zone with the view to establishing its height and stresses.
Keywords: geotechnical properties, roller compaction, deformation, computer simulation
Alexander, J. M. (1972, February). On the theory of rolling. In Proceedings of the Royal Society of London A: Mathematical, Physical and Engineering Sciences (Vol. 326, No. 1567, pp. 535-563). The Royal Society.
Berga, L. (2003). Roller compacted concrete dams. Lisse: A.A. Balkema.
Chiroux, R., Foster, W., Johnson, C., Shoop, S., & Raper, R. (2005). Three-dimensional finite element analysis of soil interaction with a rigid wheel. Applied Mathematics And Computation, 162(2), 707-722.
Hambleton, J., & Drescher, A. (2008). Development of improved test rolling methods for roadway embankment construction. St. Paul, Minn.: Minnesota Department of Transportation, Research Services Section.
Hopkinson, I., Myatt, M., & Tajbakhsh, A. (2004). Static and dynamic studies of phase composition in a polydisperse system. Polymer, 45(12), 4307-4314.
Johnson, K. (1985). Contact mechanics. Cambridge [Cambridgeshire]: Cambridge University Press.
Miura, K. (2003). Design and construction of mountain tunnels in Japan. Tunnelling And Underground Space Technology, 18(2-3), 115-126.
Ramoni, M., & Anagnostou, G. (2010). Tunnel boring machines under squeezing conditions. Tunnelling And Underground Space Technology, 25(2), 139-157.
Vahedifard, F., Nili, M., & Meehan, C. (2010). Assessing the effects of supplementary cementitious materials on the performance of low-cement roller compacted concrete pavement. Construction And Building Materials, 24(12), 2528-2535.
Zenunović, D., & Folić, R. (2012). Models for behaviour analysis of monolithic wall and precast or monolithic floor slab connections. Engineering Structures, 40, 466-478.
Zinchuk, A., Mullarney, M., & Hancock, B. (2004). Simulation of roller compaction using a laboratory scale compaction simulator. International Journal Of Pharmaceutics, 269(2), 403-415.