Stability analysis for jointed rock slope in an open iron ore mine

被引：0
|
作者：
Wang J.-C. [1 ,2 ]
Chen C. [1 ,2 ]
机构：
[1] College of Resources and Safety Engineering, China University of Mining and Technology (Beijing), Beijing
[2] Coal Industry Engineering Research Center of Top-coal Caving Mining, Beijing
来源：
| 1643年 / China Coal Society卷 / 42期
关键词：
3D discontinuity network simulation; Jointed rock mass; Slope; Stability analysis;
D O I：
10.13225/j.cnki.jccs.2016.1243
中图分类号：
学科分类号：
摘要：
According to the structure characteristics of the joint rock mass of the east slope of Gongchangling open iron ore mine, using the 3 dimensional rock non-contact measurement system (3GSM), the investigation and statistical analysis of surface structure are performed. Detailed statistics data including surface structure tendency, inclination, joint trace length, and joints pitch are obtained. Based on Monte-Carlo stochastic simulation method, the three-dimensional network model of jointed rock mass is obtained by the structural network simulation software FracSim3D. The rock quality index RQD is obtained by drilling samples on the three-dimensional network model. Then the RMR index is evaluated combined with on-site point load test. The shear strength parameters of jointed rock mass are obtained by Hoek-Brown method. Jointed rock slope is modeled through the FISH language programming, and the stability of the slope using the discrete element software UDEC is performed. The results show that the slope is in a stable state, but the local wedge failure of rock mass occur in the upper areas of slope, which is controlled by the joints along slope direction. The phenomenon of block out also appears in dispersion zone. © 2017, Editorial Office of Journal of China Coal Society. All right reserved.
引用
收藏
页码：1643 / 1649
页数：6
相关论文
共 18 条
  • [1] Wang J., Tan W., Three dimensional stochastic analysis of slope progressive failure, Journal of China Coal Society, 22, 1, pp. 29-33, (1997)
  • [2] Wang J., Chang L., Xia C., Et al., Study on stability of jointed rock slope of an open iron mine, Chinese Journal of Rock Mechanics and Engineering, 24, 18, pp. 3350-3354, (2005)
  • [3] Wang J., Chang L., Chen Y., Study on probability damage evolutionary rule of jointed rock mass slope, Chinese Journal of Rock Mechanics and Engineering, 25, 7, pp. 1396-1401, (2006)
  • [4] Robertson A., Mac G., Piteau D.R., Determination of Joint populations and their significance for tunnel stability, Transactions of the Society of Mining Engineers of AIME, 254, 2, pp. 135-139, (1973)
  • [5] Priest S.D., Hudson J.A., Discontinuity spacings in rock, International Journal of Rock Mechanics and Mining Sciences, 13, 5, pp. 135-148, (1976)
  • [6] Larocque G.E., Kapeller F., Coates D.F., Seismic measurements and bore hole photographic observation, Canadian Mining Journal, 94, 3, pp. 44-45, (1973)
  • [7] Lautsch, Hermann, Stereo recording camera and exploratory boreholes in coal seams, Glueckauf-Forschungshefte, 34, 6, pp. 253-258, (1973)
  • [8] Long J.C.S., Remer J.S., Wilson C.R., Porous media equivalent for networks of discontinuous fractures, Water Resources Research, 18, 3, pp. 645-658, (1982)
  • [9] Priest S.D., Samaniego A., Model for the analysis of discontinuity characteristics in two dimensions, Proceedings-Congress of the International Society for Rock Mechanics, pp. F199-F207, (1983)
  • [10] Samaniego J.A., Priest S.D., Prediction of water flows through discontinuity networks into underground excavations, British Geotechnical Soc., pp. 157-164, (1984)
12