Geomechanics and Engineering

  • 제11권3호
  • /
  • Pages.345-359
  • /
  • 2016
  • /
  • 2005-307X(pISSN)
  • /
  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Failure characteristics of combined coal-rock with different interfacial angles

  • Zhao, Tong-Bin (Key Laboratory of Safety and High-efficiency Coal Mining, Ministry of Education (Anhui University of Science and Technology)) ;
  • Guo, Wei-Yao (State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology) ;
  • Lu, Cai-Ping (School of Mining Engineering, Key Laboratory of Deep Coal Resource Mining (Ministry of Education), China University of Mining and Technology) ;
  • Zhao, Guang-Ming (Key Laboratory of Safety and High-efficiency Coal Mining, Ministry of Education (Anhui University of Science and Technology))
  • 투고 : 2015.11.25
  • 심사 : 2016.05.10
  • 발행 : 2016.09.25
⟨ 이전 논문 다음 논문 ⟩

초록

In order to investigate the influence of the interfacial angel on failure characteristics and mechanism of combined coal-rock mass, 35 uniaxial/biaxial compressive simulation tests with 5 different interfacial angels of combined coal-rock samples were conducted by PFC2D software. The following conclusions are drawn: (1) The compressive strength and cohesion decrease with the increase of interfacial angle, which is defined as the angle between structure plane and the exterior normal of maximum principal plane, while the changes of elastic modulus and internal friction angle are not obvious; (2) The impact energy index $K_E$ decreases with the increase of interfacial angle, and the slip failure of the interface can be predicted based on whether the number of acoustic emission (AE) hits has multiple peaks or not; (3) There are four typical failure patterns for combined coal-rock samples including I (V-shaped shear failure of coal), II (single-fracture shear failure of coal), III (shear failure of rock and coal), and IV (slip rupture of interface); and (4) A positive correlation between interfacial angle and interface effect is shown obviously, and the interfacial angle can be divided into weak-influencing scope ($0-15^{\circ}$), moderate-influencing scope ($15-45^{\circ}$), and strong-influencing scope (> $45^{\circ}$), respectively. However, the confining pressure has a certain constraint effect on the interface effect.

키워드

과제정보

연구 과제 주관 기관 : Natural Science Foundation of China, Anhui University of Science and Technology

참고문헌

  1. Bell, F.G. (2000), Engineering Properties of Soils and Rocks, (4th Edition), Butterworth-Heinemann, Oxford, UK, 482 p.
  2. Brady, B.H.G. and Brown, E.T. (1993), Rock Mechanics for Underground Coal Mining, (2nd Edition), George Allen and Unwin, London, UK, 571 p.
  3. Chen, X., Liao, Z.H. and Peng, X. (2012), "Deformability characteristics of jointed rock masses under uniaxial compression", Int. J. Mining Sci. Technol., 22(2), 213-221. https://doi.org/10.1016/j.ijmst.2011.08.012
  4. Inmaculada Alvarez-Fernandez, M., Amor-Herrera, E., Gonzalez-Nicieza, C., Lopez-Gayarre, F. and Rodriguez Avial-Llardent, M. (2013), "Forensic analysis of the instability of a large-scale slope in a coal mining operation", Eng. Fail. Anal., 33, 197-211. https://doi.org/10.1016/j.engfailanal.2013.05.001
  5. Guo, D.M., Zuo, J.P., Zhang, Y. and Yang, R.S. (2011), "Research on strength and failure mechanism of deep coal-rock combination bodies of different inclined angles", Rock Soil Mech., 32(5), 1333-1339. [In Chinese]
  6. Lu, C.P., Liu, G.J., Liu, Y., Zhang, N., Xue, J.H. and Zhang, L. (2015), "Microseismic multi-parameter characteristics of rockburst hazard induced by hard roof fall and high stress concentration", Int. J. Rock Mech. Min. Sci., 76, 18-32.
  7. Mishra, B. and Verma, P. (2015), "Uniaxial and triaxial single and multistage creep tests on coal-measure shale rocks", Int. J. Coal Geol., 137, 55-65. https://doi.org/10.1016/j.coal.2014.11.005
  8. Mohtarami, E., Jafari, A. and Amini, M. (2014), "Stability analysis of slopes against combined circulartoppling failure", Int. J. Rock Mech. Min. Sci., 67, 43-56.
  9. Petukhov, I.M. and Linkov, A.M. (1979), "The theory of post-failure deformations and the problem of stability in rock mechanics", Int. J. Rock Mech. Min. Sci., 16(2), 57-76.
  10. Poulsen, B.A., Shen, B., Williams, D.J., Huddlestone-Holmes, C., Erarslan, N. and Qin, J. (2014), "Strength reduction on saturation of coal and coal measures rocks with implications for coal pillar strength", Int. J. Rock Mech. Min. Sci., 71, 41-52.
  11. Tan, Y.L., Li, F.C. and Zhou, H. (2000), "Analysis on acoustic emission pattern for rock burst", Chinese J. Rock Mech. Eng., 19(4), 425-428. [In Chinese]
  12. Tan, Y.L., Zang, Z. and Zhao, T.B. (2011), "AE pattern of rock burst disaster induced by strata activation in coal mine", Disaster Adv., 4(4), 29-33.
  13. Tan, Y.L., Yin, Y.C. and Gu, S.T. (2015), "Multi-index monitoring and evaluation on rock burst in Yangcheng Mine", Shock Vib., Article ID 624893.
  14. Thomas, L. (2002), Coal Geology, John Wiley and Sons, New York, NY, USA, 384 p.
  15. Vakili, A. and Hebblewhite, B.K. (2010), "A new cavability assessment criterion for longwall top coal caving", Int. J. Rock Mech. Min. Sci., 47(8), 1317-1329. https://doi.org/10.1016/j.ijrmms.2010.08.010
  16. Ward, C.R. (1984), Coal Geology and Coal Technology, Blackwell Scientific Publications, Melbourne, Australia, 345 p.
  17. Yin, Y.C., Zhao, T.B. and Tan, Y.L. (2015), "Reconstruction and numerical test of the mesoscopic model of rockbased on Otsu digital image processing", Rock Soil Mech., 36(9), 2532-2540.
  18. Zhao, Z.H., Wang, W.M., Wang, L.H. and Dai, C.Q. (2015a), "Compressive-shear strength criterion of coalrock combination model considering interface effect", Tunn. Undergr. Sp. Tech., 47, 193-199. https://doi.org/10.1016/j.tust.2015.01.007
  19. Zhao, T.B., Yin, Y.C., Tan, Y.L. and Song, Y.M. (2015b), "Deformation tests and failure process analysis of an anchorage structure", Int. J. Min. Sci. Technol., 25(2), 237-242. https://doi.org/10.1016/j.ijmst.2015.02.012
  20. Zuo, J.P., Wang, Z.F., Zhou, H.W., Pei, J.L. and Liu, J.F. (2013), "Failure behavior of a rock-coal-rock combined body with a weak coal interlary", Int. J. Min. Sci. Technol., 23(6), 907-912. https://doi.org/10.1016/j.ijmst.2013.11.005

피인용 문헌

  1. Effect of Saturation Time on the Coal Burst Liability Indexes and Its Application for Rock Burst Mitigation vol.36, pp.1, 2018, https://doi.org/10.1007/s10706-017-0300-2
  2. Simulation Study on Strength and Failure Characteristics for Granite with a Set of Cross-Joints of Different Lengths vol.2018, pp.1687-8094, 2018, https://doi.org/10.1155/2018/2384579
  3. Effect of joint angle in coal on failure mechanical behaviour of roof rock–coal combined body vol.51, pp.2, 2018, https://doi.org/10.1144/qjegh2017-041
  4. Acoustic Emission and Failure Modes for Coal-Rock Structure under Different Loading Rates vol.2018, pp.1687-8094, 2018, https://doi.org/10.1155/2018/9391780
  5. Numerical Research on Energy Evolution and Burst Behavior of Unloading Coal–Rock Composite Structures pp.1573-1529, 2018, https://doi.org/10.1007/s10706-018-0609-5
  6. Numerical Simulation on Uniaxial Compression Failure of A Roof Rock–Coal–Floor Rock Composite Sample with Coal Persistent Joint pp.1573-1529, 2019, https://doi.org/10.1007/s10706-018-0585-9
  7. Influence of interaction between coal and rock on the stability of strip coal pillar vol.16, pp.2, 2016, https://doi.org/10.12989/gae.2018.16.2.151
  8. Investigation lateral deformation and failure characteristics of strip coal pillar in deep mining vol.14, pp.5, 2016, https://doi.org/10.12989/gae.2018.14.5.421
  9. Mechanical behavior of rock-coal-rock specimens with different coal thicknesses vol.15, pp.4, 2016, https://doi.org/10.12989/gae.2018.15.4.1017
  10. Strength and failure characteristics of the rock-coal combined body with single joint in coal vol.15, pp.5, 2016, https://doi.org/10.12989/gae.2018.15.5.1113
  11. The establishment of IB-SEM numerical method and verification of fluid-solid interaction vol.15, pp.6, 2016, https://doi.org/10.12989/gae.2018.15.6.1161
  12. An Experimental Study of the Uniaxial Failure Behaviour of Rock-Coal Composite Samples with Pre-existing Cracks in the Coal vol.2019, pp.None, 2016, https://doi.org/10.1155/2019/8397598
  13. Experimental Investigations on the Progressive Failure Characteristics of a Sandwiched Coal-Rock System Under Uniaxial Compression vol.9, pp.6, 2016, https://doi.org/10.3390/app9061195
  14. Experimental Study on Mechanical Properties, Failure Behavior and Energy Evolution of Different Coal-Rock Combined Specimens vol.9, pp.20, 2016, https://doi.org/10.3390/app9204427
  15. Effects of coal's initial macro-cracks on rockburst tendency of rock-coal composite samples vol.6, pp.11, 2019, https://doi.org/10.1098/rsos.181795
  16. A new burst evaluation index of coal-rock combination specimen considering rebound and damage effects of rock vol.11, pp.1, 2020, https://doi.org/10.1080/19475705.2020.1760945
  17. Mechanical properties and failure mechanisms of sandstone with pyrite concretions under uniaxial compression vol.22, pp.5, 2020, https://doi.org/10.12989/gae.2020.22.5.385
  18. Material constituents and mechanical properties and macro-micro-failure modes of tight gas reservoirs vol.38, pp.6, 2016, https://doi.org/10.1177/0144598720913069
  19. Investigations of Coal-Rock Parting-Coal Structure (CRCS) Slip and Instability by Excavation vol.2021, pp.None, 2021, https://doi.org/10.1155/2021/1715644
  20. Effects of interface angles on properties of rock-cemented coal gangue-fly ash backfill bi-materials vol.24, pp.1, 2021, https://doi.org/10.12989/gae.2021.24.1.081
  21. Experimental study on mechanical properties and failure behaviour of the pre-cracked coal-rock combination vol.80, pp.3, 2016, https://doi.org/10.1007/s10064-020-02049-6
  22. Experimental and numerical simulation of loading rate effects on failure and strain energy characteristics of coal-rock composite samples vol.28, pp.10, 2016, https://doi.org/10.1007/s11771-021-4831-6
  23. Experimental Study on the Short-Term Uniaxial Creep Characteristics of Sandstone-Coal Composite Samples vol.11, pp.12, 2021, https://doi.org/10.3390/min11121398