Study on the Characteristics of Strata Movement and Surface Subsidence Induced by Multiseam Mining
Publication: International Journal of Geomechanics
Volume 23, Issue 6
Abstract
Multiseam mining generates enhanced characteristics of strata movement and surface subsidence (CSMSS) than single seam mining, which strongly increases the possibility of mine water disasters and surface deformation. In this study, the effect of seam separation distances and key stratum (KS) configurations on CSMSS is evaluated using the discrete-element method. The results of the analyses indicated that control function loss of the KS aggravated the failure of the overlying strata and expanded the original water-flowing fractured zone, which grew by 91.49% and 23.40% in short-distance and medium-distance multiseam mining. In addition, the subsidence was higher in the first two cases and also in the tilts and strains. The separation and penetrating tensile cracks determined the upper boundary of the caved and fractured zones in the discrete-element method simulation analysis supported by field data. Finally, this study provides a method for identifying the multiseam category according to the CSMSS resulting from multiseam mining operations, which is the first step toward effective disaster prevention and management.
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Acknowledgments
This paper was supported by the National Natural Science Foundation of China (U1710253, 51909032, 52004052, and U1903216). In addition, we would like to thank anonymous reviewers and the editor for constructive comments that helped improve the quality of this manuscript.
References
Adhikary, D., M. Khanal, C. Jayasundara, and R. Balusu. 2016. “Deficiencies in 2D simulation: A comparative study of 2D versus 3D simulation of multi-seam longwall mining.” Rock Mech. Rock Eng. 49: 2181–2185. https://doi.org/10.1007/s00603-015-0842-7.
Cheng, G., T. Ma, C. Tang, H. Liu, and S. Wang. 2017. “A zoning model for coal mining—Induced strata movement based on microseismic monitoring.” Int. J. Rock Mech. Min. Sci. 94: 123–138. https://doi.org/10.1016/j.ijrmms.2017.03.001.
Cheng, G., T. Yang, H. Liu, L. Wei, Y. Zhao, Y. Liu, and J. Qian. 2020. “Characteristics of stratum movement induced by downward longwall mining activities in middle-distance multi-seam.” Int. J. Rock Mech. Min. Sci. 136: 104517. https://doi.org/10.1016/j.ijrmms.2020.104517.
Coal Industry Bureau of China. 2017. Coal mining regulations and coal pillar design affected by buildings, water bodies, railways and main roadway. Beijing: China Coal Industry Publishing House.
Do, T. N., J. H. Wu, and H. M. Lin. 2017. “Investigation of sloped surface subsidence during inclined seam extraction in a jointed rock mass using discontinuous deformation analysis.” Int. J. Geomech. 17 (8): 04017021. https://doi.org/10.1061/(ASCE)GM.1943-5622.0000894.
Ghabraie, B., G. Ren, J. Barbato, and J. V. Smith. 2017a. “A predictive methodology for multi-seam mining induced subsidence.” Int. J. Rock Mech. Min. Sci. 93: 280–294. https://doi.org/10.1016/j.ijrmms.2017.02.003.
Ghabraie, B., G. Ren, and J. V. Smith. 2017b. “Characterising the multi-seam subsidence due to varying mining configuration, insights from physical modelling.” Int. J. Rock Mech. Min. Sci. 93: 269–279. https://doi.org/10.1016/j.ijrmms.2017.02.001.
Ghabraie, B., G. Ren, X. Zhang, and J. Smith. 2015. “Physical modelling of subsidence from sequential extraction of partially overlapping longwall panels and study of substrata movement characteristics.” Int. J. Coal Geol. 140: 71–83. https://doi.org/10.1016/j.coal.2015.01.004.
Hood, M., R. T. Ewy, and L. R. Riddle. 1983. “Empirical methods of subsidence prediction—A case study from Illinois.” Int. J. Rock Mech. Min. Sci. Geomech. Abstr. 20: 153–170. https://doi.org/10.1016/0148-9062(83)90940-3.
Huang, W. P., C. Li, L. W. Zhang, Q. Yuan, Y. S. Zheng, and Y. Liu. 2018. “In situ identification of water-permeable fractured zone in overlying composite strata.” Int. J. Rock Mech. Min. Sci. 105: 85–97. https://doi.org/10.1016/j.ijrmms.2018.03.013.
Ju, J., and J. Xu. 2013. “Structural characteristics of key strata and strata behaviour of a fully mechanized longwall face with 7.0 m height chocks.” Int. J. Rock Mech. Min. Sci. 58: 46–54. https://doi.org/10.1016/j.ijrmms.2012.09.006.
Ju, J., and J. Xu. 2015. “Surface stepped subsidence related to top-coal caving longwall mining of extremely thick coal seam under shallow cover.” Int. J. Rock Mech. Min. Sci. 78: 27–35. https://doi.org/10.1016/j.ijrmms.2015.05.003.
Khanal, M., D. Adhikary, C. Jayasundara, and R. Balusu. 2016. “Numerical study of mine site specific multiseam mining and its impact on surface subsidence and chain pillar stress.” Geotech. Geol. Eng. 34: 217–235. https://doi.org/10.1007/s10706-015-9940-2.
Lai, X., M. Cai, F. Ren, M. Xie, and T. Esaki. 2006. “Assessment of rock mass characteristics and the excavation disturbed zone in the Lingxin Coal Mine beneath the Xitian River, China.” Int. J. Rock Mech. Min. Sci. 43: 572–581. https://doi.org/10.1016/j.ijrmms.2005.10.005.
Li, G., P. Steuart, and R. Pâquet. 2007. “A case study on multi-seam subsidence with specific reference to longwall mining under existing longwall goaf.” In Proc., 7th Triennial Conf. on Mine Subsidence, 111–125. Sydney, Australia: Mine Subsidence Technological Society.
Li, L. C., C. A. Tang, X. D. Zhao, and M. Cai. 2014. “Block caving-induced strata movement and associated surface subsidence: A numerical study based on a demonstration model.” Bull. Eng. Geol. Environ. 73: 1165–1182. https://doi.org/10.1007/s10064-014-0656-y.
Li, Y., T.-h. Yang, H.-l. Liu, X.-g. Hou, and H. Wang. 2017. “Effect of mining rate on the working face with high-intensity mining based on microseismic monitoring: A case study.” J. Geophys. Eng. 14: 350–358. https://doi.org/10.1088/1742-2140/aa5b5a.
Liu, C., H. Li, and H. Mitri. 2019. “Effect of strata conditions on shield pressure and surface subsidence at a longwall top coal caving working face.” Rock Mech. Rock Eng. 52: 1523–1537. https://doi.org/10.1007/s00603-018-1601-3.
Liu, X., Y. Tan, J. Ning, C. Tian, and J. Wang. 2015. “The height of water-conducting fractured zones in longwall mining of shallow coal seams.” Geotech. Geol. Eng. 33: 693–700. https://doi.org/10.1007/s10706-015-9851-2.
Ma, K., and G. Liu. 2022. “Three-dimensional discontinuous deformation analysis of failure mechanisms and movement characteristics of slope rockfalls.” Rock Mech. Rock Eng. 55: 275–296. https://doi.org/10.1007/s00603-021-02656-z.
Peng, S. S., W. M. Ma, and W. L. Zhong. 1992. Surface subsidence engineering. Littleton, CO: Society for Mining, Metallurgy, and Exploration.
Qian, M. G., and P. W. Shi. 2003. Control of mine ground pressure and strata. Xuzhou, China: China Univ. of Mining and Technology Press.
Qu, Q., J. Xu, R. Wu, W. Qin, and G. Hu. 2015. “Three-zone characterisation of coupled strata and gas behaviour in multi-seam mining.” Int. J. Rock Mech. Min. Sci. 78: 91–98. https://doi.org/10.1016/j.ijrmms.2015.04.018.
Sheorey, P. R., J. P. Loui, K. B. Singh, and S. K. Singh. 2000. “Ground subsidence observations and a modified influence function method for complete subsidence prediction.” Int. J. Rock Mech. Min. Sci. 37: 801–818. https://doi.org/10.1016/S1365-1609(00)00023-X.
Suchowerska, A. M. 2014. The geomechanics of single-seam and multi-seam longwall coal mining. Callaghan, Australia: Univ. of Newcastle.
Sun, Y., J. Zuo, M. Karakus, and J. Wang. 2019. “Investigation of movement and damage of integral overburden during shallow coal seam mining.” Int. J. Rock Mech. Min. Sci. 117: 63–75. https://doi.org/10.1016/j.ijrmms.2019.03.019.
Wang, G.-f., S.-y. Gong, Z.-l. Li, L.-m. Dou, W. Cai, and Y. Mao. 2016. “Evolution of stress concentration and energy release before rock bursts: Two case studies from Xingan Coal mine, Hegang, China.” Rock Mech. Rock Eng. 49: 3393–3401. https://doi.org/10.1007/s00603-015-0892-x.
Wang, P., L. S. Jiang, J. Q. Jiang, P. Q. Zheng, and W. Li. 2018. “Strata behaviors and rock burst-inducing mechanism under the coupling effect of a hard, thick stratum and a normal fault.” Int. J. Geomech. 18 (2): 04017135. https://doi.org/10.1061/(ASCE)GM.1943-5622.0001044.
Wang, Y., K. Deng, D. Zhang, and M. Zhou. 1998. “Study on subsidence characteristics of overburden under repeated mining.” J. China Coal Soc. 5: 3–5.
Xu, J., X. Wang, W. Liu, and Z. Wang. 2009. “Effects of primary key stratum location on height of water flowing fracture zone.” Chin. J. Rock Mech. Eng. 28: 381–385.
Xu, J., W. Zhu, J. Xu, J. Wu, and Y. Li. 2021. “High-intensity longwall mining-induced ground subsidence in Shendong coalfield, China.” Int. J. Rock Mech. Min. Sci. 141: 104730. https://doi.org/10.1016/j.ijrmms.2021.104730.
Yan, H., J. Zhang, R. Feng, W. Wang, Y. Lan, and Z. Xu. 2020. “Surrounding rock failure analysis of retreating roadways and the control technique for extra-thick coal seams under fully-mechanized top caving and intensive mining conditions: A case study.” Tunnelling Underground Space Technol. 97: 103241. https://doi.org/10.1016/j.tust.2019.103241.
Ying-ke, L., Z. Fu-bao, L. Lang, L. Chun, and H. Shen-yong. 2011. “An experimental and numerical investigation on the deformation of overlying coal seams above double-seam extraction for controlling coal mine methane emissions.” Int. J. Coal Geol. 87: 139–149. https://doi.org/10.1016/j.coal.2011.06.003.
Yu, B., R. Gao, T. Kuang, B. Huo, and X. Meng. 2019. “Engineering study on fracturing high-level hard rock strata by ground hydraulic action.” Tunnelling Underground Space Technol. 86: 156–164. https://doi.org/10.1016/j.tust.2019.01.019.
Zhang, C., R. Mitra, J. Oh, and B. Hebblewhite. 2016. “Analysis of mining-induced valley closure movements.” Rock Mech. Rock Eng. 49: 1923–1941. https://doi.org/10.1007/s00603-015-0880-1.
Zhang, K., T. Yang, H. Bai, and R. P. Gamage. 2018. “Longwall mining–induced damage and fractures: Field measurements and simulation using FDM and DEM coupled method.” Int. J. Geomech. 18 (1): 04017127. https://doi.org/10.1061/(ASCE)GM.1943-5622.0001040.
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Published In
International Journal of Geomechanics
Volume 23 • Issue 6 • June 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Jun 7, 2022
Accepted: Nov 5, 2022
Published online: Apr 10, 2023
Published in print: Jun 1, 2023
Discussion open until: Sep 10, 2023
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