Zhang, C, Canbulat, I, Tahmasebinia, F, Vardar, O & Saydam, S 2017, 'Analysis of a potential coalburst phenomenon in different strata layers in underground coal mines', in J Wesseloo (ed.), Deep Mining 2017: Proceedings of the Eighth International Conference on Deep and High Stress Mining
, Australian Centre for Geomechanics, Perth, pp. 413-422, https://doi.org/10.36487/ACG_rep/1704_29_Zhang
Coalburst is referred to as the violent failure of overstressed coal, which has been recognised as one of the most critical dynamic failures in coal mines. This paper aims to analytically and numerically evaluate the energy transformation between the different strata and coal layers. An accurate closed-form solution is developed. Due to the complexity of the causes and mechanisms contributing to the coalburst occurrence, 3D finite element modelling was developed to validate the suggested analytical assessments of rock/coalburst occurrence. The energy concept is emphasised in order to improve the understanding of the underlying mechanisms of coalburst. Only with enhanced understanding of the driving mechanisms, a reliable coalburst risk assessment can be achieved.
Keywords: coalburst, mechanisms, energy, numerical modelling
Cai, M 2013, ‘Principles of rock support in burst-prone ground’, Tunnelling and Underground Space Technology, vol. 36, pp. 46–56.
Cook, NGW, Hoek, E, Pretorius, JPG, Ortlepp, WD & Salamon, MDG 1966, ‘Rock mechanics applied to the study of rockbursts’, The Journal of the South African Institute of Mining and Metallurgy, vol. 66, pp. 435–528.
Cook, NGW 1983, ‘Origin of rockbursts’, in L Richards (ed.), Rockbursts; Prediction and Control, Institution of Mining and Metallurgy, London, pp. 1–9.
Dassault Systèmes Simulia Corp. 2012, ABAQUS/Explicit User’s Manual, version 6.13EF-2, Dassault Systèmes Simulia Corp., Providence, Rhode Island.
Gong, QM, Yin, LJ, Wu, SY, Zhao, J& Ting, Y 2012, ‘Rock burst and slabbing failure and its influence on TBM excavation at headrace tunnels in Jinping II hydropower station’, Engineering Geology, vol. 124, no. 1, pp. 98–108.
Li, S, Feng, XT, Li, Z, Chen, B, Zhang, C, & Zhou, H 2012, ‘In situ monitoring of rockburst nucleation and evolution in the deeply buried tunnels of Jinping II hydropower station’, Engineering Geology, vol. 137–138, pp. 85–96.
Linkov, AM 1996, ‘Rockbursts and the instability of rock masses’, International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, vol. 33, no. 7, pp. 727–732.
Mitri, HS, Tang, B & Simon, R 1999, ‘FE modelling of mining-induced energy release and storage rates’, The Journal of the South African Institute of Mining and Metallurgy, vol. 99, no. 2, pp. 103–110.
Mortazavi, A & Alavi, FT 2013, ‘A numerical study of the behavior of fully grouted rockbolts under dynamic loading’, Soil Dynamics and Earthquake Engineering, vol. 54, pp. 66–72.
Nie, W, Zhao, ZY, Ning, YJ & Guo, W 2014, ‘Numerical studies on rockbolts mechanism using 2D discontinuous deformation analysis’, Tunnelling and Underground Space Technology, vol. 41, pp. 223–233.
Ortlepp, WD & Stacey, TR 1994, ‘Rockburst mechanisms in tunnels and shafts’, Tunnelling and Underground Space Technology, vol. 9, no. 1, pp. 59–65.
Peng, SS 2008, Coal Mine Ground Control, Department of Mining Engineering, College of Engineering and Mineral Resources, Morgantown, West Virginia.
Poeck, EC, Zhang, K, Garvey, R & Ozbay, U 2015, ‘Energy concepts in the analysis of unstable coal pillar failures’, Proceedings 34th International Conference on Ground Control in Mining, 28–30 July 2015, Morgantown, West Virginia, West Virginia University, Morgantown, pp. 105–111.
Ranzi, G, Gilbert, R 2015, Structural Analysis: Principles, Methods and Modelling, CRC Press, Boca Raton, Florida.
Ranzi, G, Dall Asta, A, Ragni, L & Zona, A 2010, ‘A geometric nonlinear model for composite beams with partial interaction’, Engineering Structures, vol. 32, no. 5, pp. 1384–1396.
Salamon, MDG 1984, ‘Energy considerations in rock mechanics; fundamental results’, The Journal of the South African Institute of Mining and Metallurgy, vol. 84, pp. 233–246.
Sirait, B, Wattimena, RK, & Widodo, NP 2013, ‘Rockburst prediction of a cut and fill mine by using energy balance and induced stress’, Procedia Earth and Planetary Science, vol. 6, pp. 426–434.
Tarasov, BG & Randolph, MF 2008, ‘Frictionless shear at great depth and other paradoxes of hard rocks’, International Journal of Rock Mechanics and Mining Sciences, vol. 45, no. 3, pp. 316–328.
Wang, JA & Park, HD 2001, ‘Comprehensive prediction of rockburst based on analysis of strain energy in rocks’, Tunnelling and Underground Space Technology, vol. 16, no. 1, pp. 49–57.
Wattimena, RK, Sirait, B, Widodo, NP & Matsui, K 2012, ‘Evaluation of rockburst potential in a cut-and-fill mine using energy balance’, International Journal of the Japanese Committee for Rock Mechanics, vol. 8, no. 1, pp. 19–23.
Zhang, X, Feng, G, Kang, L & Yang, S 2009, ‘Method to determine burst tendency of coal rock by residual energy emission speed’, Journal of the China Coal Society, vol. 34, pp. 1165-1168.