Deformation reasons and support technology of deep and high-stress soft rock roadway

被引：0
|
作者：
Yang R. [1 ,2 ]
Li Y. [1 ,2 ]
Guo D. [1 ,2 ]
Zhu Y. [1 ]
Yao L. [1 ]
Yang T. [1 ]
Yu X. [1 ]
机构：
[1] School of Mechanics and Architecture Engineering, China University of Mining & Technology (Beijing), Beijing
[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 | 2017年 / 34卷 / 06期
关键词：
Controlling floor heave; Coordinating deformation; Failure reasons; High-stress soft rock; Strengthening surrounding rock;
D O I：
10.13545/j.cnki.jmse.2017.06.001
中图分类号：
学科分类号：
摘要：
To solve the roadway support problems in high-stress and soft surrounding rock, based on the -850 track roadway in Jiulong coal mine, the field research, the mineral composition analysis, the tests of rock structure and etc. have been employed to investigate the deformation reasons of surrounding rock. The results show that the main reasons resulting in the supporting failure and deformation instability are the poor environmental geological settings, dramatically non-uniform deformation of surrounding rock, low working resistance of supporting structure and poor bearing capacity of surrounding rock. Based on such results, a combined supporting technology concentrating on coordinating the non- uniform deformation of surrounding rock, controlling squeeze flow floor heave and strengthening the bearing structure of surrounding rock is proposed. This support technology is based on the high strength bolts and pre-tensioned anchor cables: adding anchors in the weak parts of the roadway to implement asymmetric support to coordinate the surrounding deformation, employing the channel steel girder truss anchor cable to control floor heave by strengthening the support, spraying the shotcrete layer and erecting U-shaped steel in time to make the surface of the surrounding rock uniform compression, and finally, grouting on the whole section to strengthen the bearing structure of surrounding rock and to achieve the hierarchical cooperative bearing. The numerical results and field measurements indicate that this support technology can control the roadway deformation in the deep, high stress and soft surrounding rock which can avoid further repairing. © 2017, Editorial Board of Journal of Mining & Safety Engineering. All right reserved.
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页码：1035 / 1041
页数：6
相关论文
共 10 条
  • [1] Yuan L., Xue J., Liu Q., Et al., Surrounding rock stability control theory and support technique in deep rock roadway for coal mine, Journal of China Coal Society, 36, 4, pp. 535-543, (2011)
  • [2] 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)
  • [3] Kang H., Wang J., Lin J., High pretensioned stress and intensive bolting system and its application in deep roadways, Journal of China Coal Society, 32, 12, pp. 1233-1238, (2007)
  • [4] Sun X., He M., Numerical simulation research on coupling support theory of roadway within soft rock at depth, Journal of China University of Mining & Technology, 34, 2, pp. 166-169, (2007)
  • [5] Wang W., Guo G., Zhu Y., Et al., Malignant development process of plastic zone and control technology of high stress and soft rock roadway, Journal of China Coal Society, 40, 12, pp. 2747-2754, (2015)
  • [6] Yu W., Wang W., Huang W., Et al., Deformation mechanism and rework control technology of high stress and soft rock roadway, Journal of China Coal Society, 39, 4, pp. 614-623, (2014)
  • [7] Jiang Y., Zhao Y., Liu W., Et al., Research on floor heave of roadway in deep mining, Chinese Journal of Rock Mechanics and Engineering, 23, 14, pp. 2396-2401, (2004)
  • [8] Jiang J., Cao P., Floor heaving mechanism of soft rock in high-stress deep roadway and its control technology, Journal of Central South University (Science and Technology), 46, 11, pp. 4218-4224, (2015)
  • [9] Bai J., Wang X., Jia M., Et al., Theory and application of supporting in deep soft roadways, Chinese Journal of Geotechnical Engineering, 30, 5, pp. 632-635, (2008)
  • [10] Kang H., Fan M., Gao F., Et al., Deformation and support of rock roadway at depth more than 1000 meters, Journal of Rock Mechanics and Engineering, 34, 11, pp. 2212-2240, (2015)
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