Coordination control and stress evolution of surrounding rock of gob-side entryretaining cutting roof in deep mine

被引：0
|
作者：
Chen S. [1 ]
He M. [2 ]
Wang H. [1 ]
Yuan G. [1 ]
Zhao F. [1 ]
Guo Z. [2 ]
机构：
[1] College of Geosciences and Engineering, North China University of Water Resources and Electric Power, Zhengzhou, 450046, Henan
[2] State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology (Beijing), Beijing
来源：
Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | 2019年 / 36卷 / 04期
关键词：
Coordination control; Deep mine; Gob-side entry retaining; Influence law; Stress evolution;
D O I：
10.13545/j.cnki.jmse.2019.04.003
中图分类号：
学科分类号：
摘要：
In order to solve the problems of the increased dynamic pressure in deep gob-side entry-retaining and the difficulty in supporting the roadway, the effect of pressure relief, the stress evolution law and control technology of surrounding rock are studied in depth based on the technical principle of gob-side entry retaining cutting roof. The kerf of leading roof cuts the path through which the stress is transmitted from the roof of goaf to that of the reserved tunnel, avoiding the superposition of the mining stress and eliminating the "stress cusp" at the intersection of the working face and the mining roadway. The average pressure and periodic pressure of the bracket in the working face can be reduced by the kerf and gradually disappear with the increased distance from the kerf. And that is mainly due to the reduction of the length of direct overhead cantilever beam and the effective load of the basic roof. According to the deep geomechanical environment and the deformation characteristics of rock mass, the collaborative control system of surrounding rock of deep gob-side entry-retaining cutting roof of "Constant resistance to allow pressure to control the roof, flexible retractable place to resist lateral pressure, high resistance temporary support against dynamic pressure, and increase support length to protect coal sidewall" are constructed and the field test is carried out in working face 21304 of suburban coal mine. The results have shown that the collaborative control system can effectively control the deformation of the deep rock mass and has been well applied. © 2019, Editorial Board of Journal of Mining & Safety Engineering. All right reserved.
引用
收藏
页码：660 / 669
页数：9
相关论文
共 14 条
  • [1] He M., Xie H., Peng S., Et al., Study on rock mechanics in deep mining engineering, Chinese Journal of Rock Mechanics and Engineering, 24, 16, pp. 2803-2813, (2005)
  • [2] Xie H., Zhou H., Xue D., Et al., Research and consideration on deep coal mining and critical mining depth, Journal of China Coal Society, 37, 4, pp. 535-542, (2012)
  • [3] Hua X., Development status and improved proposals on gob-side entry retaining support technology, Coal Science and Technology, 34, 12, pp. 78-81, (2006)
  • [4] Chen Y., Bai J., Wang X., Et al., Support technology research and application inside roadway of gob-side entry retaining, Journal of China Coal Society, 37, 6, pp. 903-910, (2012)
  • [5] Tang J., Hu H., Tu X., Et al., Experimental on roadside packing gob-side entry retaining for ordinary concrete, Journal of China Coal Society, 35, 9, pp. 1425-1429, (2010)
  • [6] Kang H., Niu D., Zhang Z., Et al., Deformation characteristics of surrounding rock and supporting technology of gob-side entry retaining, Chinese Journal of Rock Mechanics and Engineering, 29, 10, pp. 1977-1987, (2010)
  • [7] Zhang G., He M., Yu X., Et al., Research on the technique of no-pillar mining with gob-side entry retaining formed by advanced roof caving in the protective seam in Baijiao coal mine, Journal of Mining & Safety Engineering, 28, 4, pp. 511-516, (2011)
  • [8] Sun X., Liu X., Liang G., Et al., Key parameters of gob-side entry retaining formed by roof cut and pressure releasing in thin seams, Chinese Journal of Rock Mechanics and Engineering, 33, 7, pp. 1449-1456, (2014)
  • [9] Guo Z., Wang J., Cao T., Et al., Research on key parameters of gob-side entry retaining automatically formed by roof cut and pressure releasing in thin coal seams mining, Journal of China University of Mining & Technology, 45, 5, pp. 879-885, (2016)
  • [10] Zhang G., Xu Y., Ge P., Research on cut gob-side entry retaining in thin coal seam of Tangshan ditch, Chinese Journal of Rock Mechanics and Engineering, 35, 7, pp. 1397-1406, (2016)
12