Yu, W & Wu, G 2017, 'Cooperative control mechanism and control effect analysis of coal seam backfill mining', in A Wu & R Jewell (eds), Proceedings of the 20th International Seminar on Paste and Thickened Tailings
, University of Science and Technology Beijing, Beijing, pp. 302-314.
Aiming at the strata movement and control problems caused by coal seam backfill mining, the control mechanism of “backfill + pillar + bearing strata” cooperative support system was proposed based on rock mechanics, surrounding rock control mechanism and related theories. The stability condition of “backfill + pillar+ bearing strata” cooperative support system was then obtained. Considering factors such as the weight of the overlying strata, waste backfill size, goaf size and so on, the concept of equivalent mining height was put forward. The compression value and the formula for analyzing equivalent mining heights for different waste backfill compactness were derived. Finally, along with practical work, theoretical calculations and numerical simulation are used to analyze overlying strata movement law of different waste backfill replacement in the corresponding pillar. The results show that the roof subsidence value and the equivalent mining height caused by secondary strata movement increased with the decrease of compactness degree of waste backfill. When the void ratio is approximately 0.55, the increment rate of equivalent mining height becomes more sensitive.
Karfakis, M.G., Bowman, C.H. and Topuz, E. 1996, ‘Characterization of coal-mine refuse as backfilling material’, Geotechnical and Geological Engineering, vol. 14, no. 2, pp. 129-150.
Liu, J.G., Zhao, J.W., Li, M.M. and Zuo, J.P. 2016, ‘Continuous curved beam formation and strata control theory in coal backfill mining’, Journal of China Coal Society, vol. 41, no. 2, pp. 383-391.
Liu, T.Y. and Cai, S.J. 1998, ‘Status quo of application and research of paste fill technology in China and abroad’, China Mining Magazine, vol. 7, no. 5, pp. 1-4.
Miao, X.X. and Qian, M.G. 2009, ‘Research on green mining of coal resources in China: current status and future prospects’, Journal of Mining& Safety Engineering, vol. 26, no. 1, pp. 1-14.
Miao, X.X., Huang, Y.L., Ju, F., Mao, X.B. and Guo, G.L. 2012, ‘Strata movement theory of dense backfilling mining’, Journal of China University of Mining & Technology, vol. 41, no. 6, pp. 863-867.
Miao, X.X., Zhang, J.X. and Guo, G.L. 2010, ‘Study of waste-filling method and technology in fully-mechanized coal mining’, Journal of China Coal Society, vol. 35, no. 1, pp. 1–6.
Siriwardane, H.J., Kaman, R.S.S. and Ziemkiewicz, P.F. 2003, ‘Use of waste materials for control of acid mine drainage and subsidence’, Journal of Environmental Engineering, vol. 129, no. 10, pp. 910-915.
Sun, X.G., Zhou, H.Q. and Wang G.W. 2007, ‘Digital simulation of strata control by solid waste paste-like body for backfilling’, Journal of Mining& Safety Engineering, vol. 24, no. 1, pp. 117-126.
Xu, J.L., You Q., Zhu, W.B., Li, X.S. and Lai W.Q. 2007, ‘Theorectical study of strip filling to control mining subsidence’, Journal of China Coal Society, vol. 32, no. 2, pp. 119-122.
Yang, J.W., Yu, W.J. and Gao, Q. 2010, ‘Optimization and practice of mechanized panel cutting and filing mining method in no.2 mine district, jinchuan mine’, Mineral Engineering Research, vol. 25, no. 3, pp. 11-15.
Yu, W.J. and Wang, W.J. 2011, ‘Strata movement induced by coal-pillar under three circumstances exchanged by waste backfill and quadratic stability law’, Chinese Journal of Rock Mechanics and Engineering, vol. 30, no. 1, pp. 105-112.
Yu, X.F. and Liu, T.Y. 1996, ‘The filling mechanism and mining theory in Jinchuan’, The 4th academic meeting symposium, Chinese Society for Rock Mechanics and Engineering.
Zhang, J.X., Miao, X.X., Mao, X.B. and Chen, Z.W. 2007, ‘Research onwaste substitution extraction of strip extraction coal-pillarmining’, Chinese Journal of Rock Mechanics and Engineering, vol. 26, no. S1, pp. 2687-2693.
Zhou, H.Q., Hou, C.J. and Yi, H.W. 1991, ‘Research and application of the roadside backfilling technique with high water content materials in China and abroad’. Ground Pressure and Strata Control, vol. 8, no. 4, pp. 2-6.
Zhou, H.Q., Hou, C.J., Sun, X.K., Qu, Q. and Chen, D.J. 2004, ‘Solid waste paste filling for none-village-relocation coal mining’, Journal of China University of Mining & Technology, vol. 33, no. 2, pp. 154-158.