Discussion on the stability evaluation standard of a rock slope in a noncoal open-pit mine

被引：0
作者：
Wu S.-C. [1 ,2 ]
He P.-B. [1 ]
Cheng H.-Y. [1 ,2 ]
Wang G.-H. [3 ]
Zhang X.-Q. [1 ]
Zhang Z.-X. [1 ]
机构：
[1] Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming
[2] Key Laboratory of High Efficient Mining and Safety of Metal Mines (Ministry of Education), University of Science and Technology Beijing, Beijing
[3] Zhongkan Metallurgical Geotechnical Investigation Design and Research Institute Co., Ltd, Baoding
来源：
Gongcheng Kexue Xuebao/Chinese Journal of Engineering | 2022年 / 44卷 / 05期
关键词：
Design safety factor; Evaluation standard; Instability probability; Open-pit mine; Rock slope; Slope stability;
D O I：
10.13374/j.issn2095-9389.2021.02.01.001
中图分类号：
学科分类号：
摘要：
As an important way to obtain mineral resources, open-pit mining has accounted for about 77% of the total production of the mined iron ore, and about 52% of the total production of non-ferrous ore, indicating huge development potential. With the continuous development of open-pit mines to deep and large-scale directions, the height of mine slopes is constantly increasing and the maximum height has exceeded kilometers. Slope instability disaster is a major problem faced by open-pit mines, and the evaluation and analysis of the stability of mine slopes are of great importance. However, in the stability evaluation and analysis of rock slopes in many open-pit mines, the engineering scale is ignored, the value of design safety factor is too conservative, and the evaluation index is single, rendering it difficult to consider the economy and safety of mine slope evaluation and resulting in the waste of resources and frequent accidents. In this paper, rock slopes were divided into three scales according to the production process characteristics of open-pit mines: (1) overall slope, (2) inter-ramp slope, and (3) bench slope. Moreover, the control elements and failure modes of the slopes were analyzed. Combined with the design safety factor value of the civil-engineering slope standards and specifications of a non-coal open-pit mine slope, the design safety factor requirements of non-coal open-pit mine slopes at home and abroad were discussed, then six suggestions were put forward. Comprehensively taking service years and the improved scheme of design safety factor in slope scale into consideration, the instability probability were introduced to extend the design standard of slope stability evaluation in different scales, which can effectively improve the rationality and scientificity of the rock slope stability evaluation in non-coal open-pit mines, further improving the mining slope design theory and method. Copyright ©2022 Chinese Journal of Engineering. All rights reserved.
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页码：876 / 885
页数：9
相关论文
共 39 条
  • [1] Qian M G, Miao X X, Xu J L, Et al., On scientized mining, J Min Saf Eng, 25, 1, (2008)
  • [2] Wang Q M., Status que of large and medium slopes in China non-coal open-pit mines and countermeasures, Met Mine, 10, (2007)
  • [3] Qin H N., Study on Waste Dump Landslide Inducement Mechanism and Monitoring and Early Warning Technology of Zijinshan Gold and Copper Mine, (2016)
  • [4] Statistical Analysis report on production safety accidents in non-coal Mines nationwide in 2017》was released, Occup Health Emerg Rescue, 36, 3, (2018)
  • [5] Wang S W, Liu H D, Wan L H., Research of safety standard of pit slope, J North China Inst Water Conserv Hydroelectr Power, 25, 1, (2004)
  • [6] GB51016-2014 Technical Code for Non-coal Open Mine Slope Engineering, (2014)
  • [7] Du S G, Yong R, Chen J Q, Et al., Graded analysis for slope stability assessment of large open-pit mines, Chin J Rock Mech Eng, 36, 11, (2017)
  • [8] Du S G., Method of equal accuracy assessment for the stability analysis of large open-pit mine slopes, Chin J Rock Mech Eng, 37, 6, (2018)
  • [9] Terbrugge P J, Wesseloo J, Venter J, Et al., A risk consequence approach to open pit slope design, J S Afr Inst Min Metall, 106, 7, (2006)
  • [10] Johari A, Lari A M., System probabilistic model of rock slope stability considering correlated failure modes, Comput Geotech, 81, (2017)
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