120.55
ICV
8
MNiSW
CC BY-NC 3.0 Polska
 
 

STUDY ON INTENSIVE DESIGN AND CONTROL OF CHAMBER GROUP UNDER THE CONDITION OF WEAK SURROUNDING ROCK

Jun Yang 1, 2,  
Shilin Hou 1, 2,  
Kaifang Zhou 1, 2  ,  
Bowen Qiao 1, 2,  
Hongyu Wang 1, 2,  
 
1
Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining & Technology, Beijing
2
School of Mechanics and Civil Engineering, China University of Mining & Technology, Beijing
Mining Science 2019;26:223–240
KEYWORDS
TOPICS
ABSTRACT
In order to study the design and stability control of deep soft rock chamber group, taking ninth coal mine of Hebi Coal Power Co., Ltd. as the engineering background, The main problem in normal design is analyzed with the combined method of FLAC3D numerical simulation and field engineering test. and then puts forward targeted control measures and carries out field application. The results show that, compared with the conventional design, the intensive design can reduce the stress concentration degree and plastic zone range of the surrounding rock, as well as reduce the quantities. Compared with conventional supporting schemes, the surrounding rock deformation greatly reduces by more than 82% after adopting bolting and shotcreting with wire mesh + anchor cable + floor anchor supporting. Among them, the floor heave control has obvious effect, and the decreasing amplitude reaches more than 93%. The field application shows that the surrounding rock deformation of the main chamber is within the allowable range, and the chamber control effect is good. Therefore, the research results can provide reference for the design and control of similar chamber groups.
CORRESPONDING AUTHOR
Kaifang Zhou   
Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining & Technology, Beijing
 
REFERENCES (22):
1. YOICHI H., YAMASHITA R., 1985, Study on the stability of a group of caverns. Proceedings of the Fifth International Conference on Numerical Methods in Geomechanics, Vol. 2, 1201–1206.
2. HAGAN T.N., 1984, Blast design considerations for underground mining and construction operation. ISRM Symposium: Design and Performance of Underground Excavation, 255–262.
3. YU Y., XIAO M., 1987, Three Dimensions Elasto-Plastic Finite Element Analysis for the Surrounding Rock Stability of Large-scale Underground Openings, Chinese Journal of Rock Mechanics and Engi-neering, 6 (1), 47–56.
4. LI S.C., ZHU W.S., CHEN W.Z., 1996, Optimization of Constructional Sequence for Excavation of a Group of Underground Chambers in Xiaolangdi Water Conservancy Project. Journal of China Coal Society, 21 (4), 393–398.
5. ZHANG Y.X., 1998, Research on recognition for stability of rock around roadway by fuzzy neural net-works and fuzzy mathematics, Chinese Journal of Geotechnical Engineering, 20 (3), 90–93.
6. XIAO M., GONG Y.F., YU Y.T., 1987, Three-dimensional stability analysis on surrounding rock of underground houses of xilongchi pumped storage hydro-power station. Chinese Journal of Rock Me-chanics and Engineering, 1987, 6 (1), 47–56.
7. YAN C.B., XU G.Y., 2006, Numerical simulation analysis on stability of vertically arranged under-ground chambers under dynamic load, Journal of Central South University (Science and Technology), 37 (3), 593–599.
8. LI A., DAI F., XU N.W. et al., 2017, Failure mechanism and mode of surrounding rock of underground powerhouse at the right bank of Wudongde hydropower station subjected to excavation, Chinese Journal of Rock Mechanics and Engineering, 36 (4): 781–793.
9. DUAN S.Q., FENG X., JIANG Q. et al., 2017, Failure modes and mechanisms for rock masses with staggered zones of Baihetan underground caverns under high geostress, Chinese Journal of Rock Mechanics and Engineering, 36 (4), 852–864.
10. HAN Y.Q., LI M.C., ZHOU H.B., 2014, 3D geological analysis and application of underground caverns under environment of complicated faults network structure, Rock and Soil Mechanics, 35 (11), 3303–3309.
11. RUI P., QI W., BEI J. et al., 2017, Failure of bolt support and experimental study on the parameters of bolt-grouting for supporting the roadways in deep coal seam, Engineering Failure Analysis, 80, 218–233.
12. PAN R., WANG Q., WANG L. et al., 2018, Research on mechanical effect and parameters of bolt-grouting reinforcement for deep roadway, Journal of Mining and Safety Engineering, 35 (2), 267–275.
13. HE M.C., GONG W.L., WANG Q. et al., 2014, Development of a novel energy-absorbing bolt with extraordinarily large elongation and constant resistance, International Journal of Rock Mechanics and Mining Sciences, 67, 29–42.
14. WANG W.J., ZHANG P., PENG W.Q. et al., 2008, Deformation Analysis on Surrounding Rock of Large Cross Section Coal Bunker Chamber Supported with Bolting and Grouting, Journal of Hunan University of Science and Technology (Natural Science Edition), 23 (4), 6–9.
15. SUN X.M., WANG D., MIAO C.Y. et al., 2015, Research on dynamic pressure instability mechanism and control countermeasure of deep pump room and chamber group in Nantun Coal Mine, Journal of China Coal Society, 40 (10), 2303–2312.
16. KANG Y.S., LIU Q.S., GONG G.Q. et al., 2014, Application of a combined support system to the weak floor reinforcement in deep underground coal mine. International Journal of Rock Mechanics and Mining Sciences, 71, 143–150.
17. CHEN S.Y., DU B.B., GUO Z.B. et al., 2015, Failure mechanism analysis and control technology of roadway in structure broken zone, Coal Science and Technology, 43 (9), 47–52, 128.
18. NAITHANI A.K., 2017, Geotechnical Investigations and Support Design of Underground Pump House Cavern: A Case Study from Lift Irrigation Project, Geotechnical and Geological Engineering, 35 (5), 2445–2453.
19. PENG G., WANG W.J., LI S.Q., 2008, Study on the Bolt- grouting Repairing Reinforcement Technology in Incompact and Fractured Chamber, Journal of Hunan University of Science and Technology (Natural Science Edition), 23 (1), 6–9.
20. BEHNIA M., SEIFABAD M.C., 2018, Stability analysis and optimization of the support system of an underground powerhouse cavern considering rock mass variability, Environmental Earth Sciences,.
21. 77 (18), 645.
22. HE M.C., 2004, A kind of pump house suction well. Chinese patent: ZL:2003200532.6.
Copy url
Share
 
 
Sign up for email alerts
 
eISSN:2353-5423
ISSN:2300-9586