Stability and Deformation Analysis for Excavation and Backfilling of Fushun West Open-Pit Coal Mine

Abstract:

Taking section W400 of Fushun west open-pit coal mine for the research, the interface model of fracture zone and surrounding rock was established. FLAC^3D is used to analysis the influence of excavation and backfill of open-fit coal mine to the slope stability and deformation. The numerical results and analysis show that: (1) when the open-pit coal mine slope is excavated to final production line, the safety coefficient is 2.98, with the excavation, the deformation of the Fushun No.1 Refinery Factory area increases. (2) With the increase of backfilling, the slope coefficient increases to 3.32, this will reduce the deformation of the Fushun No.1 Refinery Factory area. Furthermore, the positions of the dangerous slip surface and serious deformation part of factory area should be regards as key areas. These conclusions could provide technical basis for the stability analysis of Fushun west open-pit coal mine.

• Periodical: Applied Mechanics and Materials (Volumes 353-356)
• Pages: 751-755
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.353-356.751
• Online since: August 2013
• Authors: Yong Cheng Yan, Xian Zhang Ling, Feng Zhang, Jia Hui Wang
• Keywords: Fault, Ground Deformation, Interface Model, Numerical Simulation, Open-Pit Coal Mine Slope

References

[1] M. C. He, Stability Analysis Report of Foundation in Fushun No. 1 Petroleum Factory, China University of Excavation and Technology. (1989).

[2] T. H. Yang, Y. Q. Rui, C. A. Tang, et al, Study on Deformation Features and Dynamic Stability of Creeping Slope of Fushun West Strip Mine, Rock and Soil Mechanics, Vol. 25 (2004), pp.153-156.

[3] X. M. Ma, Y. Q. Rui, Q. Y. Huo, et al. Dynamic Analysis of Large-scale Toppling Deformation Slope and the Problem of Trends Prediction, Coal Science and Technology, Vol. 25, (1997), pp.38-40.

[4] Regional Geology of Liaoning Province(Liaoning Provincial Bureau of Geology and Mineral Resources). Liaoning: Geological Publishing House. (1989), pp.679-691.

[5] Q. Y. Huo, Dynamic Analysis of Creep Slope Deformation at Surface Coal Mines, Opencast Coal Excavation Technology, Vol. 2, (1997), pp.33-35.

[6] Y. Q. Rui, The Study on the Stability of Northern Slope of Fushun West Open-pit Mine, Coal Research Institute, Fushun Branch. (1990).

[7] Y. C. Yan, X. Z. Ling, The Study on the Underground Deformation under the Effect of Excavation Opencast Coal Mine, Journal of Northeastern University, Vol. 33(s2), 2012, pp.226-230.