DOI QR코드

DOI QR Code

New approaches to testing and evaluating the impact capability of coal seam with hard roof and/or floor in coal mines

  • Tan, Y.L. (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) ;
  • Liu, X.S. (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) ;
  • Shen, B. (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) ;
  • Ning, J.G. (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) ;
  • Gu, Q.H. (College of Mining and Safety Engineering, Shandong University of Science and Technology)
  • 투고 : 2017.03.27
  • 심사 : 2017.08.24
  • 발행 : 2018.03.20

초록

Samples composed of coal and rock show different mechanical properties of the pure coal or rock mass. For the same coal seam with different surrounding rocks, the frequency and intensity of rock burst can be significantly different in. First, a method of measuring the strain variation of coal in the coal-rock combined sample was proposed. Second, laboratory tests have been conducted to investigate the influences of rock lithologies, combined forms and coal-rock height ratios on the deformation and failure characteristics of the coal section using this method. Third, a new bursting liability index named combined coal-rock impact energy speed index (CRIES) was proposed. This index considers not only the time effect of energy, but also the influence of surrounding rocks. At last, a new approach considering the influences of roof and/or floor was proposed to evaluate the impact capability of coal seam. Results show that the strength and elastic modulus of coal section increase significantly with the coal-rock height ratio decreasing. In addition, the values of bursting liability indexes of the same coal seam vary greatly when using the new approach. This study not only provides a new approach to measuring the strain of the coal section in coal-rock combined sample, but also improves the evaluation system for evaluating the impact capability of coal.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China, Ministry of Education of China

참고문헌

  1. Cai, W., Dou, L.M., Si, G.Y., Cao, A.Y., He, J. and Liu, S. (2016), "A principal component analysis/fuzzy comprehensive evaluation model for coal burst liability assessment", J. Rock Mech. Min. Sci., 81, 62-69.
  2. Dehghan, S., Shahriar, K., Maarefvand, P. and Goshtasbi, K. (2013), "3-D modeling of rock burst in pillar No. 19 of Fetr6 chromite mine", J. Min. Sci. Technol., 23(2), 231-236. https://doi.org/10.1016/j.ijmst.2013.04.014
  3. Dou, L.M., Lu, C.P., Mu, Z.L., Zhang, X.T. and Li, Z.H. (2006), "Rock burst tendency of coal-rock combinations sample", J. Min. Safe. Eng., 23(1), 43-46.
  4. Feng, X.J., Wang, E.Y., Shen, R.X., Wei, M.Y., Chen, Y. and Cao, X.Q. (2011), "The dynamic impact of rock burst induced by the fracture of the thick and hard key stratum", Proc. Eng., 26, 457-465. https://doi.org/10.1016/j.proeng.2011.11.2192
  5. GB/T 25217.2-2010 (2010), Methods for Test, Monitoring and Prevention of Rock Burst-Part 2: Classification and laboratory Test Method on Bursting Liability of Coal, Standards Press of China, Beijing, China.
  6. Ghanbari, E. and Hamidi, A. (2014), "Numerical modeling of rapid impact compaction in loose sands", Geomech. Eng., 6(5), 487-502. https://doi.org/10.12989/gae.2014.6.5.487
  7. Gholizadeh, S., Leman, Z. and Baharudin, B.T.H.T. (2015) "A review of the application of acoustic emission technique in engineering", Struct. Eng. Mech., 54(6), 1075-1095. https://doi.org/10.12989/sem.2015.54.6.1075
  8. Guo, W.Y., Zhao, T.B., Tan, Y.L., Yu, F.H., Hu, S.C. and Yang, F.Q. (2017), "Progressive mitigation method of rock bursts under complicated geological conditions", J. Rock Mech. Min. Sci., 96, 11-22.
  9. Hu, S.C., Tan, Y.L., Zhou, H., Guo, W.Y., Hu, D.W., Meng, F.Z. and Liu, Z.G. (2017), "Impact of bedding planes on mechanical properties of sandstone", Rock Mech. Rock Eng., 50(8), 2243-2251. https://doi.org/10.1007/s00603-017-1239-6
  10. Huang, B.X. and Liu, J.W. (2013), "The effect of loading rate on the behavior of samples composed of coal and rock", J. Rock Mech. Min. Sci., 61, 23-30.
  11. Jiang, Q., Feng, X.T., Xiang, T.B. and Su, G.S. (2010), "Rockburst characteristics and numerical simulation based on a new energy index: a case study of a tunnel at 2,500 m depth", Bull. Eng. Geol. Environ., 69(3), 381-388. https://doi.org/10.1007/s10064-010-0275-1
  12. Jiang, Y.D., Wang, H.W., Zhao, Y.X., Zhu, J. and Pang, X.F. (2011), "The influence of roadway backfill on bursting liability and strength of coal pillar by numerical investigation", Proc. Eng., 26, 1125-1143. https://doi.org/10.1016/j.proeng.2011.11.2283
  13. Kidybinski, A. (1981), "Bursting liability indexes of coal", J. Rock Mech. Min. Sci. Geomech. Abstr., 18(4), 295-304. https://doi.org/10.1016/0148-9062(81)91194-3
  14. Li, H.T., Zhou, H.W., Jiang, Y.D. and Wang, H.W. (2016), "An evaluation method for the bursting characteristics of coal under the effect of loading rate", Rock Mech. Rock Eng., 49(8), 3281-3291. https://doi.org/10.1007/s00603-016-0984-2
  15. Li, J.Q., Qi, Q.X., Mao, D.B. and Wang, Y.X. (2005), "Discussion on evaluation method of bursting liability with composite model of coal and rock", Chin. J. Rock Mech. Eng., 24(S1), 4805-4810.
  16. Liu, B., Yang, R.S., Guo, D.M. and Zhang, D.Z. (2004), "Burstprone experiments of coal-rock combination at -1100 m level in suncun coal mine", Chin. J. Rock Mech. Eng., 23(14), 2402-2408.
  17. Liu, X.S., Ning, J.G., Tan, Y.L. and Gu, Q.H. (2016), "Damage constitutive model based on energy dissipation for intact rock subjected to cyclic loading", J. Rock Mech. Min. Sci., 85, 27-32.
  18. Liu, X.S., Tan, Y.L., Ning, J.G., Tian, C.L. and Tian, Z.W. (2016), "Energy criterion of abutment pressure induced strain-mode rockburst", Rock Soil Mech., 37(10), 2929-2936.
  19. Ning, J.G., Wang, J., Tan, Y.L. and Shi, X.S. (2016), "Dissipation of impact stress waves within the artificial blasting damage zone in the surrounding rocks of deep roadway", Shock Vibr.
  20. Pan, Y.S., Geng, L. and Li, Z.H. (2010), "Research on evaluation indexes for impact tendency and danger of coal seam", J. Chin. Coal Soc., 35(12), 1175-1178.
  21. Panaghi, K., Golshani, A. and Takemura, T. (2015), "Rock failure assessment based on crack density and anisotropy index variations during triaxial loading tests", Geomech. Eng., 9(6), 793-813. https://doi.org/10.12989/gae.2015.9.6.793
  22. Prochazka, P.P. (2014), "Rock bursts due to gas explosion in deep mines based on hexagonal and boundary elements", Adv. Eng. Softw., 72, 57-65. https://doi.org/10.1016/j.advengsoft.2013.06.013
  23. Qiu, S.L., Feng, X.T., Jiang, Q. and Zhang, C.Q. (2014), "A novel numerical index for estimating strainburst vulnerability in deep tunnels", Chin. J. Rock Mech. Eng., 33(10), 2007-2017.
  24. Song, D.Z., Wang, E.Y., Li, Z.H., Qiu, L.M. and Xu, Z.Y. (2017), "EMR: An effective method for monitoring and warning of rock burst hazard", Geomech. Eng., 12(1), 53-69. https://doi.org/10.12989/gae.2017.12.1.053
  25. Tajdus, A., Cieslik, J. and Tajdus, K. (2014), "Rockburst hazard assessment in bedded tock mass: Laboratory tests of rock samples and numerical calculations", Arch. Min. Sci., 59(3), 591-608.
  26. Tan, Y.L., Guo, W.Y., Gu, Q.H., Zhao, T.B., Yu, F H., Hu, S.C. and Yin, Y.C. (2016), "Research on the rockburst tendency and AE characteristics of inhomogeneous coal-rock combination bodies", Shock Vibr., 1-11.
  27. Tan, Y.L., Liu, X.S., Ning, J.G. and Lu, Y.W. (2017), "In situ investigations on failure evolution of overlying strata induced by mining multiple coal seams", Geotech. Test. J., 40(2), 244-257.
  28. Wang, J.C., Jiang, F.X., Meng, X.J., Wang, X.Y., Zhu, S.T. and Feng, Y. (2016), "Mechanism of rock burst occurrence in specially thick coal seam with rock parting", Rock Mech. Rock Eng., 49(5), 1953-1965. https://doi.org/10.1007/s00603-015-0894-8
  29. Wang, T., Jiang, Y.D., Zhan, S.J. and Wang, C. (2014), "Frictional sliding tests on combined coal-rock samples", J. Rock Mech. Geotech. Eng., 6(3), 280-286. https://doi.org/10.1016/j.jrmge.2014.03.007
  30. Yang, F.J., Zhou, H., Lu, J.J., Zhang, C.Q. and Hu, D.W. (2015), "An energy criterion in process of rockburst", Chin. J. Rock Mech. Eng., 34(S1), 2706-2714.
  31. Yang, S.Q. (2015), "An experimental study on fracture coalescence characteristics of brittle sandstone specimens combined various flaws", Geomech. Eng., 8(4), 541-557. https://doi.org/10.12989/gae.2015.8.4.541
  32. Zhang, X.Y., Feng, G.R., Kang, L.X. and Yang, S.S. (2009), "Method to determine burst tendency of coal rock by residual energy emission speed", J. Chin. Coal Soc., 34(9), 1165-1168.
  33. Zhao, T.B., Guo, W.Y., Lu, C.P. and Zhao, G.M. (2016), "Failure characteristics of combined coal-rock with different interfacial angles", Geomech. Eng., 11(3), 345-359. https://doi.org/10.12989/gae.2016.11.3.345
  34. Zhao, T.B., Guo, W.Y., Tan, Y.L., Lu, C.P. and Wang, C.W. (2017), "Case histories of rock bursts under complicated geological conditions", Bull. Eng. Geol. Environ., 1-17.
  35. Zhao, Z.H., Wang, W.M., Wang, L.H. and Dai, C.Q. (2015), "Compression-shear strength criterion of coal-rock combination model considering interface effect", Tunn. Undergr. Sp. Technol., 47, 193-199. https://doi.org/10.1016/j.tust.2015.01.007
  36. 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 interlayer", J. Min. Sci. Technol., 23(6), 907-912. https://doi.org/10.1016/j.ijmst.2013.11.005

피인용 문헌

  1. Prediction Model of Failure Zone in Roadway Sidewall considering the Lithologic Effect of Rock Formation vol.2018, pp.None, 2018, https://doi.org/10.1155/2018/9627564
  2. An Experimental Study of the Uniaxial Failure Behaviour of Rock-Coal Composite Samples with Pre-existing Cracks in the Coal vol.2019, pp.None, 2018, https://doi.org/10.1155/2019/8397598
  3. Physio-Mechanical Characterization of Rocks vol.49, pp.3, 2018, https://doi.org/10.1520/jte20180955
  4. Study on Failure Modes and Energy Evolution of Coal-Rock Combination under Cyclic Loading vol.2020, pp.None, 2018, https://doi.org/10.1155/2020/5731721
  5. Impact Dynamic Properties and Energy Evolution of Damaged Sandstone Based on Cyclic Loading Threshold vol.2020, pp.None, 2018, https://doi.org/10.1155/2020/6615602
  6. Effects of Temperature and Water on Mechanical Properties, Energy Dissipation, and Microstructure of Argillaceous Sandstone under Static and Dynamic Loads vol.2020, pp.None, 2018, https://doi.org/10.1155/2020/8827705
  7. Experimental Study on the Dynamic Mechanical Properties of Large-Diameter Mortar and Concrete Subjected to Cyclic Impact vol.2020, pp.None, 2018, https://doi.org/10.1155/2020/8861197
  8. Study on Microseismic Monitoring, Early Warning, and Comprehensive Prevention of a Rock Burst under Complex Conditions vol.2020, pp.None, 2020, https://doi.org/10.1155/2020/8863771
  9. Mechanical Characteristics of Coal Samples under Triaxial Unloading Pressure with Different Test Paths vol.2020, pp.None, 2018, https://doi.org/10.1155/2020/8870821
  10. Study on Deflection of Surrounding Rock Force Chain and Disaster Mechanism of Instability in Deep Stope vol.2020, pp.None, 2018, https://doi.org/10.1155/2020/8883897
  11. Analysis of Failure Characteristics and Strength Criterion of Coal-Rock Combined Body with Different Height Ratios vol.2020, pp.None, 2018, https://doi.org/10.1155/2020/8842206
  12. Laboratory investigation of the mechanical properties of coal-rock combined body vol.79, pp.4, 2018, https://doi.org/10.1007/s10064-019-01613-z
  13. Numerical simulation research on response characteristics of surrounding rock for deep super-large section chamber under dynamic and static combined loading condition vol.27, pp.12, 2018, https://doi.org/10.1007/s11771-020-4509-5