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Support parameters optimization and engineering application of roadway with broken-expand surrounding rock in deep

Weijian Yu 1  ,  
 
1
Key Laboratory of Safe and Effective Coal Mining (Anhui University of Science and Technology) Huainan, China
2
School of Resource, Environment and safety Engineering, Hunan University of Science and Technology
Mining Science 2017;24:252–268
KEYWORDS:
TOPICS:
ABSTRACT:
Aiming at the deformation characteristics and the support problem of deep high stress broken-expand surrounding rock, the secondary support of the deep roadway engineering of Fenglong coal mine in Jiangxi Province, China, is carried out to optimize the parameters. First of all, according to the characteristics of deep roadway deformation in Fenglong coal mine, the specific support scheme was put forward on the basis of the original support, then, the secondary support parameters and the support time are designed. The softening strength parameters of the surrounding rock in the roadway are obtained by using the piecewise linear strain softening model and the dilatancy angle of the rock mass. Considering the strength effect of cable anchor, the calculation equation and support strength index ID concept of anchor cable are put forward, and the corrected calculation parameters of anchorage effect are given. Then, the numerical calculation is carried out for 16 schemes, meanwhile, the optimal scheme of the comprehensive evaluation index Es of roadway engineering stability is adopted. The influence of different anchoring effect on the stability of roadway and different secondary displacement value on the stability of roadway are analyzed respectively. Finally, the optimized support scheme is used to carry out the engineering practice, the results of monitoring the deformation of roadway by cross method show that the deformation value is within the controllable range, which can better control the roadway deformation.
CORRESPONDING AUTHOR:
Weijian Yu   
Key Laboratory of Safe and Effective Coal Mining (Anhui University of Science and Technology),Ministry of Education, Key Laboratory of Safe and Effective Coal Mining (Anhui University of Science and Technology),Minist, 232001 Huainan, China
 
REFERENCES (18):
1. BAI J.B., HOU C.J., 2006. Control principle of surrounding rocks in deep roadway and its application, Journal of China University of Mining and Technology, 35 (2), 145–148.
2. CHANG J.C., XIE G.X., 2012. Research on space-time coupling action laws of anchor-cable strengthening supporting for rock roadway in deep coal mine, Journal of Coal Science & Engineering, 18 (2), 113–117.
3. CHANG Q.L., ZHOU H.Q., LI D.W. et al., 2007. Stability Principle of Extremely Rigid Secondary Support for Soft and Broken Rock Roadway, Journal of Mining and Safety Engineering, 24 (2), 169–172.
4. KANG H.P., WANG J.H., LIN J., 2007. High pretension stress and intensive bolting system and its application in deep roadways, Journal of China Coal Society, 32 (12), 1233–1238.
5. LI X.F., CHENG G.H., LI X.Q. et al., 2014. A Study of Soft Rock Roadway Coupling Support in Xiajing Coal Mine, Procedia Engineering, 84, 812–817.
6. LI Y.M., ZHANG H., MENG X.R., 2015. Research on secondary support time of soft rock roadway, Journal of China Coal Society, 40 (s1), 47–52. 268 W.J. YU, G.S. WU.
7. LIU H.T., LI J.Q., 2015. Research on timeliness of coordination support of bolting-mesh-shotcretinggrouting in deep roadway, Journal of China Coal Society, 40 (10), 2347–2354.
8. NIU S.J., JING H.W., YANG X.X. et al., 2012. Experimental study of strength degradation law of surrounding rock in fractured zone of deep roadway, Chinese Journal of Rock Mechanics and Engineering, (08), 1587–1596.
9. WANG W.J., LI S.Q., OUYANG G.B., 2006. Study on technique and test of surrounding rock control of deep shaft coal roadway. Chinese Journal of Rock Mechanics and Engineering, 25 (10), 2102–2107.
10. XIAO T.Q., BAI J.B., WANG X.Y. et al., 2011. Stability principle and control of surrounding rock in deep coal roadway with large section and thick top-coal, Rock and Soil Mechanics, 32 (6), 1874–1880.
11. YANG R.S., LI Y.L., GUO D.M. et al., 2017. Failure mechanism and control technology of waterimmersed roadway in high-stress and soft rock in a deep mine, International Journal of Mining Science and Technology, 27 (2), 245–252.
12. YU W.J., WANG P., DU S.H., 2014a. Deformation mechanism of high stress and broken-expansion surrounding rock and supporting optimization based on the gray correlation theory, Journal of Chongqing University (English Edition), 13 (3), 99–114.
13. YU W.J., WANG W.J., HUANG W.Z. et al., 2014b. Deformation mechanism and rework control technology of high stress and soft rock roadway, Journal of China Coal Society, 39 (4), 614–623.
14. YU W.J., WANG W.J., WU G.S. et al., 2017. Three Zones and Support Technique for Large Section Incline Shaft Crossing Goaf, Geotechnical & Geological Engineering, 1, 1–11.
15. YU W.J., WANG W.J., CHEN X.Y. et al., 2015. Field investigations of high-stress soft surrounding rocks and deformation control, Journal of Rock Mechanics and Geotechnical Engineering, 7 (4), 421–433.
16. ZHANG G.C., HE F.L., 2015. Deformation failure mechanism of high stress deep soft roadway and its control, Journal of Mining and Safety Engineering, 32 (4), 571–577.
17. ZHANG N., WANG B.G., ZHENG X.G. et al., 2010. Analysis on Grouting Reinforcement Results in Secondary Support of Soft Rock Roadway in Kilometre Deep Mine, Coal Science and Technology, 38 (5), 34–38.
18. ZHAO Z.Q., MA N.J, GUO X.F. et al., 2016. Falling principle and support design of butterfly-failure.
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