Stability evaluation and layout of surrounding rock in deep large section tunnel

被引：0
|
作者：
Zhu C. [1 ,2 ]
Yuan Y. [1 ,2 ]
Yuan C. [1 ,2 ]
Wang W. [1 ,2 ]
Meng C. [1 ,2 ]
机构：
[1] School of Mines, China University of Mining and Technology, Xuzhou, 221116, Jiangsu
[2] State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, 221116, Jiangsu
来源：
Yuan, Yong (yy20062006@163.com) | 1600年 / China University of Mining and Technology卷 / 37期
关键词：
Boundary stress coefficient; Numerical calculation; Peak value region of maximum principal stress; Stability of surrounding rock;
D O I：
10.13545/j.cnki.jmse.2020.01.002
中图分类号：
学科分类号：
摘要：
In view of the characteristics of large deformation and difficult supporting of the rock surrounding in deep large-section roadways and chambers, FLAC3D numerical calculation method has been used to reveal the spatiotemporal evolution of the peak value region of maximum principal stress in surrounding rock. And the control effect of the peak value region of maximum principal stress on deformation and failure of surrounding rock has been analyzed. Consequently, the comprehensive methods for evaluating the development range of plastic zone and stability of surrounding rock have been put forward. 151 numerical simulation schemes have been designed to study the influence of tectonic stress on the stability of rock surrounding large-section roadways and chambers in three types of in-situ stress field according to the differences of in-situ stress field type, lateral pressure coefficient and the angle between chamber axial and maximum horizontal principal stress. The results have shown that the development of plastic zone is consistent with the migration of the peak value region of maximum principal stress in the surrounding rock. The development range of plastic zone can be determined by the boundary stress coefficient K, and the K value is 0.96 by ergodic numerical calculation. In the σH-type stress field, the optimum layout angle of roadways and chambers is 30 degrees when λH equals λh. The roadways and chambers are arranged parallel to the maximum horizontal principal stress when λH is not equal to λh, which is most conducive to the stability of surrounding rock. In the σHv-type stress field, the optimum layout angle of roadways and chambers are 0 to 15 degrees between its axis and the maximum horizontal principal stress. In the σv-type stress field, there is no best arrangement angle for roadways and chambers when λH equals λh. The layout of roadways and chambers should follow the maximum horizontal stress theory when λH is not equal to λh. © 2020, Editorial Board of Journal of Mining & Safety Engineering. All right reserved.
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页码：11 / 22
页数：11
相关论文
共 14 条
  • [1] Jing S., Su Z., Wang X., Research and application on the coupling mechanism of cable and masonry for chamber with large-section, Journal of Mining & Safety Engineering, 35, 6, pp. 1158-1163, (2018)
  • [2] Xiao T., Li H., Wang G., Et al., Study on surrounding rock stability control in large section chamber with complex structure, Journal of Mining & Safety Engineering, 34, 1, pp. 9-15, (2017)
  • [3] Xiao T., Li H., Yang J., Et al., Deformation and failure mechanism of surrounding rock in chamber with super large section and its control, Journal of China Coal Society, 39, 4, pp. 631-636, (2014)
  • [4] Zhang Z., Tang C., Yu Q., Et al., Numerical simulation on influence coefficient of lateral pressure on broken zone of circular aperture, Rock and Soil Mechanics, 30, 2, pp. 413-418, (2009)
  • [5] He F., Zhang G., Stability analysis and control of deep underground roadways subjected to high horizontal tectonic stress, Journal of China University of Mining & Technology, 44, 3, pp. 466-476, (2015)
  • [6] Gale W.J., Blackwood R.L., Stress distributions and rock failure around coal mine roadways, International Journal of Rock Mechanics & Mining Sciences & Geomechanics Abstracts, 24, 3, pp. 165-173, (1987)
  • [7] Sun Y., Affects of in-situ horizontal stress on stability of surrounding rock roadway, Journal of China Coal Society, 35, 6, pp. 891-895, (2010)
  • [8] Chen D., Hua X., The deformation law of the surrounding rock in deep mining roadways under the influence of multi-factors and the control countermeasures, Journal of Mining & Safety Engineering, 34, 4, pp. 760-768, (2017)
  • [9] Liu Q., Study on affecting of in-situ stress distribution law on stability of roadway surrounding rock, Coal Technology, 34, 12, pp. 37-39, (2015)
  • [10] Zhao W., Han L., Zhang Y., Et al., Study on the influence of principal stress on the stability of surrounding rock in deep soft rock roadway, Journal of Mining & Safety Engineering, 32, 3, pp. 504-510, (2015)
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