Mining of Mineral Deposits

ISSN 2415-3443 (Online)

ISSN 2415-3435 (Print)

Flag Counter

Implementing FLAC3D model for simulating deformation mechanism of steel frame support set by actual profile

V. Nazymko1, V. Griniov1

1Institute for Physics of Mining Processes the National Academy of Sciences of Ukraine, Dnipropetrovsk, Ukraine

Min. miner. depos. 2016, 10(1):57-62

Full text (PDF)


      Purpose. The problem of simulating steel frame irreversible deformation and displacement remains unsolved. The purpose of this research was to develop a new approach to simulation of frame yield support.

      Methods. We used combination of different methods, namely FLAC3D model, benchmark tests and materialistic frames profile in the form of primitive proxies in place of standard structural elements, for instance, beams, which are actually mathematical lines that have abstract geometrical characteristics of the frame profile.

      Findings. The research focused on the interaction of steel frame supports and the surrounding rocks during tail entry maintenance behind the longwall face to provide direct flow of air, which reduces methane explosion hazard.

      Originality. The proposed profile model can be helpful as a practical tool that can assist in frame support improvement during complex interaction of rock massif with frame support in difficult geological and geomechanical conditions.

      Practical implications. Owing to this approach, we were able to obtain practically all patterns of the actual frame profile behavior: frame turn and displacement, plastic hinge in coffering, longitudinal twisting and splitting, lateral bending, breakage and sliding in yield joints. Surprisingly, frame support behavior in computer model was extraordinary realistic despite primitive approximation of the frame profile, which demonstrates originality of the new approach.

      Keywords: air gate, rock pressure, support, strains, computer simulation


Baisarov, L. (2001). Entry Maintenance with Pumped Cribs during Longwall Mining. Coal of Ukraine, 9, 3-5.

FLAC3D (2008). Fast Lagrangian Analysis of Continua in 3 Dimensions. Online Manual. Minneapolis, Itasca.

Guo, Z., Wang, J., & Zhang, Y. (2015). Failure mechanism and supporting measures for large deformation of Tertiary deep soft rock. International Journal Of Mining Science And Technology, 25(1), 121-126.

Hadjigeorgiou, J., & Potvin, Y. (2011). A Critical Assessment of Dynamic Rock Reinforcement and Support Testing Facilities. Rock Mechanics and Rock Engineering, 44(5), 565-578.

Kang, H. (2014). Support technologies for deep and complex roadways in underground coal mines: a review. International Journal Of Coal Science & Technology, 1(3), 261-277.

Korzeniowski, W, Plechota S., & Stachowicz, S. (2000). Obudo-wa mieszana chodnikow przianowych w Kopalni Wegla Kamienego “Bogdanka”. Wiadomosci Gorniczne, 4, 34-41.

Qingbin, M., Lijun, H., Jingwu, S., Min, F., Feng, W., & Zhou, X. (2015). Experimental study on the bolt-cable combined supporting technology for the extraction roadways in weakly cemented strata. International Journal of Mining Science and Technology 25, 113–119.

Šňupárek, R., & Konečný P. (2010). Stability of roadways in coalmines alias rock mechanics in practice. Journal of Rock Mechanics and Geotechnical Engineering, 2 (3), 281–288.

Stahlmann, J., Missal, C., Hahn, P., & Edel, T. (2014). Geotechnical conditions at the Konrad mine - Excavation of drifts and rooms in squeezing rock. Mining Report, 150(5), 277-288.

Stenmans, K., & Hellwig, R. (2013). Operating experience with high-tempered steel roadway supports at West colliery. Mining Report, 149(S1), 37-47.

Tatone, B.S.A., & Grasselli G. (2015). A calibration procedure for two-dimensional laboratory-scale hybrid finite–discrete element simulations. International Journal of Rock Mechanics and Mining Sciences, 75, 56-72.

Лицензия Creative Commons