Current Science

Open Access Open Access  Restricted Access Subscription Access

Determination of the Critical Span for a Large-Caving above a Mined-out Area


Affiliations
1 College of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, 430081, China
2 College of Resources and Civil Engineering, Northeastern University, Shenyang, Liaoning, 110819, China
3 Xigang Dengta Mining Co Ltd, Liaoning, Liaoyang, 111300, China
 

An analytical model presented here was developed to determine the critical span for a large-caving that developed above the mined out area in Xiaowanggou Iron Mine. The model development is based on field observations measurements, examination of the characteristics of overlying rock masses, research on caving process and application of simple loading conditions in the gravitational field. Key input parameters were determined and utilized to predict the critical span for a large-caving. The difference between the predicted and measured values is less than ±3%. Results from the analytical model and field measurements have demonstrated that the proposed model can be used to predict the timing and crater location of large-caving and it forms the theoretical basis for mitigation of risk associated with a largecaving in a safe and economical manner.

Keywords

Arch Theory, Critical Span, Large Caving, Mined Out Area, Subsidence.
User
Notifications
Font Size

  • Li, Q. W., Ren, F. Y., Hou, J. G. and Li, J., Regularity of roof-fall in the southern worked-out zone of Xishimen Iron Ore Mine. China Min. Mag., 2001, 3, 44–46.

  • Zhou, Z. H., Ren, F. Y., Yuan, G. Q. and Ma, W. F., Application of induced caving technique in goaf treatment. Met. Mine., 2005, 12, 73–74.

  • Ren, F. Y., Li, H. Y., Ren, M. L., Liang, B. D. and Hu, F. Y., Technique of induced caving on adjacent mined-out areas in Shujigou Iron Mine. China Min. Mag., 2012, 1, 378–380.

  • Ren, F. Y., Han, Z. Y., Zhao, E. P. and Wang, W. J., Induced caving technique and its application in Beiminghe Iron Mine. Min. Res. Develop., 2007, 1, 17–19.

  • Zhao, W. and Ren, F., Prevention of rock falling and impact waves in a large-size connected mined-out area of dumbbell shape. China Min. Mag., 2000, 3, 79–82.

  • Szwedzicki, T., Geotechnical precursors to large-scale ground collapse in mines. Int. J. Rock Mech. Min., 2001, 38, 957–965.

  • Arvind, K. M., Awadh, K. M. and Manamohan, R., Blast-induced caving from surface over continuous miner panel at a 110 m cover in an Indian mine. Arab. J. Sci. Eng., 2013, 38, 1861–1870.

  • Wu, A. X., Wang, Y. M. and Hu, G. B., Air shock wave induced by roof falling in a large scale in ultra-huge mined-area. J. China Univ. Min. Technol., 2007, 4, 473–477.

  • Li, J. P., Xiao, X. F. and Feng, C. G., Progress in developing methods for dealing with Forsaken Stope. Chin. Saf. Sci. J., 2012, 3, 48–54.

  • Villegas, T. T., Nordlund, E. E. and Dahner, L. C. C., Hangingwall surface subsidence at the Kiirunavaara Mine, Sweden. Eng. Geol., 2011, 121, 18–27.

  • Gu, X. J., Study of mechanism of mine tremor due to falling-in by catastrophic theory. Chin. Saf. Sci. J., 2003, 10, 12–14+2.

  • Hudyma, M., Potvin, Y. and Allison, D., Seismic monitoring of the Northparkes lift 2 block cave – part I undercutting. J. South Afr. Inst. Min. Metall., 2008, 7, 405–419.

  • Jie, X., Jiang, J. D., Liu, Q. S. and Gao, Y. F., Stability analysis and failure forecasting of deep-buried underground caverns based on microseismic monitoring. Arab. J. Sci. Eng., 2018, 43, 1709–1719.

  • Waltham, T., Park, H. D., Suh, J., Yu, M. H., Kwon, H. H. and Bang, K. M., Collapses of old mines in Korea. Eng. Geol., 2011, 118, 29–36.

  • Hu, J. Y., Li, S. L., Lin, F., Peng, F. H., Yang, S. and Yu, Z. F., Research on disaster monitoring of overburden ground pressure and surface subsidence in extra-large mined-out area. Rock Soil Mech., 2014, 4, 1117–1122.

  • Wang, Y. M., Lu, Y. G. and Sun, G. Q., Study on the law of rock movement and surface subsidence by deep mining with sublevel caving. Met. Mine., 2015, 6, 6–9.

  • Zheng, H. C., Song, C. Y., Hu, L., Xiao, G., Li, M. and Zhang, X. J., Simulation of air shock waves induced by large-scale roof caving in huge mined out area. J. Univ. Sci. Technol. Beijing, 2010, 3, 277–281+3.

  • Carter, T. G., Guidelines for use of the scaled span method for surface crown pillar stability assessment. In Proceedings of 1st International Conference on Applied Empirical Design Methods in Mining, Lima-Perú, 9–11 June 2014, pp. 1–34.

  • Zhang, M. S., Zhu, W. C., Hou, Z. S. and Guo, X. Q., Numerical simulation for determining the safe roof thickness and Critical Goaf Span. J. Min. Saf. Eng., 2012, 4, 543–548.

  • Garrard, G. F. G. and Taylor, R. K., Collapse mechanisms of shallow coal-mine workings from field measurements. Geol. Soc. Eng. Geol. Spec. Publ., 1988, 25, 181–192.

  • Kratzsch, H., Mining Subsidence Engineering, Springer-Verlag, Berlin, Heidelberg, New York, 1983, pp. 58–59.

  • Sainsbury, B., Pierce, M. and Mas Ivars, D., Analysis of caving behaviour using a synthetic rock mass – ubiquitous joint rock mass modelling technique. In Proceedings of the 1st Southern Hemisphere International Rock Mechanics Symposium (SHIRMS), 2008, pp. 243–253.

  • Terzaghi, K., Theoretical Soil Mechanics, John Wiley and Sons, New York, 1943.

  • Duplancic, P., Characterization of caving mechanisms through analysis of stress and seismicity. Unpublished Ph D thesis, Department of Civil and Resource Engineering, University of Western Australia, 2002, p. 227.

  • Cai., M., Kaiser, P. K. and Uno, H., Estimation of rock mass deformation modulus and strength of jointed hard rock masses using the GSI system. Int. J. Rock Mech. Min. Sci., 2004, 41(1), 3–19.

  • Hu, S. M. and Hu, X. W., Estimation of rock mass parameters based on quantitative GSI system and Hoek-Brown criterion. Rock Soil Mech., 2011, 32, 861–866.

  • Hoek, E., Carter, T. G. and Diederichs, M. S., Quantification of the geological strength index chart. In 47th US Rock Mechanics/ Geomechanics symposium, San Francisco, USA, 23–26 June 2013, p. 8.

  • Hoek, E., Carranza-Torres, C. T. and Corkum, B., Hoek-brown failure Crition, 2002 Edition, Ion Proceedings of Narms-tac Conference, Toronto, 2002, 1, 267–273.


Abstract Views: 154

PDF Views: 70




  • Determination of the Critical Span for a Large-Caving above a Mined-out Area

Abstract Views: 154  |  PDF Views: 70

Authors

Haiying
College of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, 430081, China
Fengyu Ren
College of Resources and Civil Engineering, Northeastern University, Shenyang, Liaoning, 110819, China
Yunfeng Zhao
Xigang Dengta Mining Co Ltd, Liaoning, Liaoyang, 111300, China
Sitong Ren
College of Resources and Civil Engineering, Northeastern University, Shenyang, Liaoning, 110819, China

Abstract


An analytical model presented here was developed to determine the critical span for a large-caving that developed above the mined out area in Xiaowanggou Iron Mine. The model development is based on field observations measurements, examination of the characteristics of overlying rock masses, research on caving process and application of simple loading conditions in the gravitational field. Key input parameters were determined and utilized to predict the critical span for a large-caving. The difference between the predicted and measured values is less than ±3%. Results from the analytical model and field measurements have demonstrated that the proposed model can be used to predict the timing and crater location of large-caving and it forms the theoretical basis for mitigation of risk associated with a largecaving in a safe and economical manner.

Keywords


Arch Theory, Critical Span, Large Caving, Mined Out Area, Subsidence.

References





DOI: https://doi.org/10.18520/cs%2Fv116%2Fi4%2F654-660