CMS-Assisted Rock Mass Stability Assessment for Underground Excavation

CMS-Assisted Rock Mass Stability Assessment for Underground Excavation

H. Lu Z.Q. Luo M. Momayez 

School of Resources and Safety Engineering, Central South University, People’s Republic of China

Department of Mining & Geological Engineering, University of Arizona, USA

Page: 
261-270
|
DOI: 
https://doi.org/10.2495/SAFE-V4-N3-261-270
Received: 
N/A
| |
Accepted: 
N/A
| | Citation

OPEN ACCESS

Abstract: 

The accurate shape and position of cavities in an underground mine are important factors that could affect the reliability of numerical modeling analysis result. The traditional numerical stability analysis of underground mined out stopes either considers the cavity shape as a regular geometric object or uses a simple model created for analysis purposes; both of the methods could affect the accuracy of numerical simulation results. Cavity monitoring system (CMS)  is used to survey the actual 3D shape and the true position of the cavities. The 3D digital terrain model (DTM) of the grouped cavities is then created in the mine design software. A novel and integrated approach to access the stability of the underground cavity based on the DTM and numerical models is presented. By following a planned excavation sequence, the in situ stress distribution condition of the mining area has been assessed. The result will be considered as the basis of the excavation re-arrangement and safety strategy of the mining area.

Keywords: 

CMS, FLAC, mining cavity, numerical simulation, rock mass, safety & stability

  References

[1] Luo, Z., Wu, Y., Liu, X., Wang-ping, L. & Biao, Y., FLAC3D modeling for complex geologic body based on Surpac. Rock and Soil Mechanics (in Chinese), 29(5), pp. 1134–1138, 2008.

[2] Luo, Z., Liu, X., Zhang, B., Lu, H. & Li, C., Cavity 3D modeling and correlative tech-niques based on cavity monitoring. Journal of Central South University of Technology, 15(5), pp. 639–644, 2008. doi: http://dx.doi.org/10.1007/s11771-008-0119-3

[3] Wu, Y., The cavity stability numerical simulation based on CMS survey, Master Degree Thesis, Central South University, Changsha, 2007.

[4] Liu, X., Luo, Z., Yang, B., Lu, G., Cao, S. & Jiang, X., Visible calculation of mining index based on stope 3D surveying and block modeling. International Journal of Mining Science and Technology, 22(2), pp. 139–144, 2012. doi: http://dx.doi.org/10.1016/j. ijmst.2011.08.001

[5] Maerz, N., Assebaum, T.K., Williams, D., Shea, K., Xi, Y., Li, X. & Duan, Y., Visual-izing and modeling interior spaces of dangerous structures using Lidar. International Journal of Safety and Security Engineering, 2(4), pp. 330–350, 2012. doi: http://dx.doi. org/10.2495/SAFE-V2-N4-330-350

[6] Wu, Q., Xu, H. & Zou, X., An effective method for 3D geological modeling with multi-source data integration. Computers & Geosciences, 31, pp. 35–43, 2005. doi: http:// dx.doi.org/10.1016/j.cageo.2004.09.005

[7] Zeng, P., Finite Element Analysis and Applications. Tsinghua University Press: Beijing, pp. 101–214, 2004.

[8] Bakun-Mazor, D., Hatzor, Y.H. & Dershowitz, W.S., Modeling mechanical layering effects on stability of underground openings in jointed sedimentary rocks. International Journal of Rock Mechanics and Mining Sciences, 46(2), pp. 262–271, 2009. doi: http:// dx.doi.org/10.1016/j.ijrmms.2008.04.001

[9] Prusek, S. & Bock, S., Assessment of rock mass stresses and deformations around mine workings based on three-dimensional numerical modelling. Archives of Mining Sciences, 53(3), pp. 349–360, 2008. 

[10] Latha, G.M. & Garaga, A., Elasto-plastic analysis of jointed rocks using discrete continuum and equivalent continuum approaches. International Journal of Rock Mechanics and Mining Sciences, 53(7), pp. 56–63, 2012. doi: http://dx.doi.org/10.1016/j. ijrmms.2012.03.013

[11] Arosio, D., Longoni, L., Papini, M. & Zanzi, L., Seismic characterization of an abandoned mine site. ACTA Geophysica, 61(3), pp. 611–623, 2013. doi: http://dx.doi.org/10.2478/s11600-012-0090-0