1. S.S. Peng, H.S. Chiang, Longwall Mining (Wiley, New York, 1984)
2. D.M. Pappas, C. Mark, Behaviour of Simulated Longwall Gob Material, RI 9458, United States Department of Interior, Bureau of Mines, Pittsburgh, PA, USA (1993)
3. M.G.D. Salamon, Mechanism of caving in longwall coal mining, in Proceedings of the 31st US Symposium: Rock Mechanics Contributions and Challenges, ed. by W.A. Hustrulid, G.A. Johnson (A.A. Balkema, Rotterdam, 1990), pp. 161–168
4. Y.J. Zhang, G.R. Feng, T.Y. Qi, Experimental research on internal behaviour of caved rocks under the uniaxial confined compression. Adv. Mater. Sci. Eng. 2017, Article ID 6949264, pp. 8 (2017)
5. A.H. Wilson, Stress, stability in coal rib sides and pillars, in Proceedings of the First Conference on Ground Control in Mining, Morgantown, West Virginia (1981), pp. l–12