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Dynamic Mechanical Properties and Fragment Fractal Characteristics of Fractured Coal–Rock-Like Combined Bodies in Split Hopkinson Pressure Bar Tests

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Abstract

To investigate the effect of fracture distribution on the mechanical responses and failure forms of coal–rock combined masses under impact loading, dynamic impact tests on coal–rock-like combined bodies containing pre-existing cracks were carried out using split Hopkinson pressure bar. The dynamic mechanical properties and the failure and fractal characteristics of specimens under different impact velocities were investigated. The obtained results showed that the strength of fractured combined bodies was influenced by the positions and angles of cracks. It was found that fractures in coal sections had great influence on specimen strength and the maximum influence was obtained for the angle of 30°. An obvious strain rate effect was also observed on the dynamic strength of RCB (combined body with fractures in rock section) specimens. Fractal dimensions of the coal sections of cracked combined bodies were close to those of intact ones when at angles 60° and 90°, while they were smaller at angle 30°. The existence of cracks changed stress concentration in specimens under impact loading, changing their dynamic mechanics and failure characteristics, where fractures in coal sections with lower strength had a greater effect on the overall stability of combined bodies. Therefore, strengthening supporting work on the weak part of combined or layered rock masses has to be conducted in engineering practice and the failure of rock masses due to crack propagation in adjacent rock masses should be prevented.

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References

  • Charlie, C. L. (2006). Disturbance of mining operations to a deep underground workshop. Tunnelling and Underground Space Technology, 21(1), 1–8.

    Article  Google Scholar 

  • Chen, X. J., Li, L. Y., Wang, L., & Qi, L. L. (2019a). The current situation and prevention and control countermeasures for typical dynamic disasters in kilometer-deep mines in China. Safety Science, 115, 229–236.

    Article  Google Scholar 

  • Chen, G. B., Qin, Z. C., Zhang, G. H., Li, T., & Li, J. K. (2020). Law of energy distribution before failure of loaded coal–rock combined body. Rock Soil Mech, 41(6), 1–13. (in Chinese).

    Google Scholar 

  • Chen, Y. L., Zuo, J. P., Liu, D. J., & Wang, Z. B. (2019b). Deformation failure characteristics of coal–rock combined body under uniaxial compression: experimental and numerical investigations. Bulletin of Engineering Geology and the Environment, 78(5), 3449–3464.

    Article  Google Scholar 

  • Deng, Y., Chen, M., Jin, Y., & Zou, D. W. (2016). Theoretical analysis and experimental research on the energy dissipation of rock crushing based on fractal theory. J Nat Gas Sci Eng, 33, 231–239.

    Article  Google Scholar 

  • Dou, L. M., Lu, C. P., Mu, Z. L., & Gao, M. S. (2009). Prevention and forecasting of rock burst hazards in coal mines. Min Sci Technol (China), 19(5), 585–591.

    Article  Google Scholar 

  • Du, F., & Wang, K. (2019). Unstable failure of gas-bearing coal–rock combination bodies: insights from physical experiments and numerical simulations. Process Safety and Environment Protection, 129, 264–279.

    Article  Google Scholar 

  • Du, F., Wang, K., Wang, G. D., Jiang, Y. F., Xin, C. P., & Zhang, X. (2018). Investigation of the acoustic emission characteristics during deformation and failure of gas-bearing coal–rock combined bodies. Journal of Loss Prevention in the Process Industries, 55, 253–266.

    Article  Google Scholar 

  • Gong, F. Q., Ye, H., & Luo, Y. (2018). The effect of high loading rate on the behaviour and mechanical properties of coal–rock combined body. Shock Vib, 2018, 1–9.

    Article  Google Scholar 

  • Gu, J., & Zhao, Z. (2009). Considerations of the discontinuous deformation analysis on wave propagation problems. Int J Numer Anal Methods Geomech, 33(12), 1449–1465.

    Article  Google Scholar 

  • Guo, W. Y., Zhao, T. B., Tan, Y. L., Yu, F. H., Hu, S. C., & Yang, F. Q. (2017). Progressive mitigation method of rock bursts under complicated geological conditions. Int J Rock Mech Min Sci Geomech, 96, 11–22.

    Article  Google Scholar 

  • Huang, B. X., & Liu, J. W. (2013). The effect of loading rate on the behavior of samples composed of coal and rock. International Journal of Rock Mechanics and Mining Sciences, 61, 23–30.

    Article  Google Scholar 

  • Ji, H. G., Ma, H. S., Wang, J. A., Zhang, Y. H., & Cao, H. (2012). Mining disturbance effect and mining arrangements analysis of near-fault mining in high tectonic stress region. Safety Science, 50(4), 649–654.

    Article  Google Scholar 

  • Kang, H. P., Li, J. Z., Yang, J. H., & Gao, F. Q. (2017). Investigation on the influence of abutment pressure on the stability of rock bolt reinforced roof strata through physical and numerical modeling. Rock Mechanics and Rock Engineering, 50(2), 387–401.

    Article  Google Scholar 

  • Klepaczko, J. R., & Brara, A. (2001). An experimental method for dynamic tensile testing of concrete by spalling. International Journal of Impact Engineering, 25(4), 387–409.

    Article  Google Scholar 

  • Kulatilake, P. H. S. W., Malama, B., & Wang, J. L. (2001). Physical and particle flow modeling of jointed rock block behavior under uniaxial loading. International Journal of Rock Mechanics and Mining Sciences, 38(5), 641–657.

    Article  Google Scholar 

  • Laghaei, M., Baghbanan, A., Hashemolhosseini, H., & Dehghanipoodeh, M. (2018). Numerical determination of deformability and strength of 3D fractured rock mass. International Journal of Rock Mechanics and Mining Sciences, 110, 246–256.

    Article  Google Scholar 

  • Li, D. Y., Han, Z. Y., Sun, X. L., Zhou, T., & Li, X. B. (2019). Dynamic mechanical properties and fracturing behavior of marble specimens containing single and double flaws in SHPB tests. Rock Mechanics and Rock Engineering, 52, 1623–1643.

    Article  Google Scholar 

  • Li, X. B., Lok, T. S., & Zhao, J. (2005). Dynamic characteristics of granite subjected to intermediate loading rate. Rock Mechanics and Rock Engineering, 38(1), 21–39.

    Article  Google Scholar 

  • Li, X. B., Zhou, T., & Li, D. Y. (2017). Dynamic strength and fracturing behavior of single-flawed prismatic marble specimens under impact loading with a split-Hopkinson pressure bar. Rock Mechanics and Rock Engineering, 50(1), 29–44.

    Article  Google Scholar 

  • Liu, S. H. (2014). Nonlinear catastrophy model and chaotic dynamic mechanism of compound coal–rock unstable failure under coupled static-dynamic loading. J China Coal Soc, 39(2), 292–300. (In Chinese).

    Google Scholar 

  • Liu, X. S., Tan, Y. L., Ning, J. G., Lu, Y. W., & Gu, Q. H. (2018). Mechanical properties and damage constitutive model of coal in coal–rock combined body. International Journal of Rock Mechanics and Mining Sciences, 110, 140–150.

    Article  Google Scholar 

  • Lu, J., Yin, G. Z., Deng, B. Z., Zhang, W. Z., Li, M. H., Chai, X. W., et al. (2019). Permeability characteristics of layered composite coal–rock under true triaxial stress conditions. J Nat Gas Sci Eng, 66, 60–76.

    Article  Google Scholar 

  • Mark, C., & Gauna, M. (2016). Evaluating the risk of coal bursts in underground coal mines. Int J Min Sci Technol, 26(1), 47–52.

    Article  Google Scholar 

  • Nazarova, L. A., Zakharov, V. N., Shkuratnik, V. L., Nazarov, L. A., Protasov, M. I., & Nikolenko, P. V. (2017). Use of tomography in stress-strain analysis of coal–rock mass by solving boundary inverse problems. Procedia Eng, 191, 1048–1055.

    Article  Google Scholar 

  • Pan, Y. S., Li, Z. H., & Zhang, M. T. (2003). Distribution, type, mechanism and prevention of rockburst in China. Chin J Rock Mech Eng, 22(11), 1844–1851. (in Chinese).

    Google Scholar 

  • Vazaios, I., Vlachopoulos, N., & Diederichs, M. S. (2019). Assessing fracturing mechanisms and evolution of excavation damaged zone of tunnels in interlocked rock masses at high stresses using a finite-discrete element approach. J Rock Mech Geotechn Eng, 11(4), 701–722.

    Article  Google Scholar 

  • Wang, Z. C., Guo, X. P., & Wang, C. (2018). Measurement of the strong pressure appearance laws with hard roof and full mechanized mining extra thick coal seam. Geotechnical and Geological Engineering, 36(6), 3399–3409.

    Article  Google Scholar 

  • Wang, F. Y., Yang, K., You, J. X., & Lei, X. J. (2019). Analysis of pore size distribution and fractal dimension in tight sandstone with mercury intrusion porosimetry. Results Phys, 13, 102283.

    Article  Google Scholar 

  • Xie, H. P., Gao, M. Z., Zhang, R., Peng, G. Y., Wang, W. Y., & Li, A. Q. (2019). Study on the mechanical properties and mechanical response of coal mining at 1000 m or deeper. Rock Mechanics and Rock Engineering, 52, 1475–1490.

    Article  Google Scholar 

  • Xie, H. P., Wang, J. N., & Qan, P. G. (1996). Fractal characters of micropore evolution in marbles. Physics Letters A, 218(3–6), 275–280.

    Article  Google Scholar 

  • Xie, B. J., & Yan, Z. (2019). Dynamic mechanical constitutive model of combined coal–rock mass based on overlay model. J China Coal Soc, 44(2), 463–472. (in Chinese).

    Google Scholar 

  • Xu, X. D., He, M. C., Zhu, C., Lin, Y., & Cao, C. (2019). A new calculation model of blasting damage degree-Based on fractal and tie rod damage theory. Engineering Fracture Mechanics. https://doi.org/10.1016/j.engfracmech.2019.106619.

    Article  Google Scholar 

  • Zhang, H. W., Elsworth, D., & Wang, Z. J. (2018). Failure response of composite rock-coal samples. Geomech Geophys Geo-Energy Geo-Resour, 4(2), 175–192.

    Article  Google Scholar 

  • Zhang, N. B., & Liu, C. Y. (2016). Arch structure effect of the coal gangue flow of the fully mechanized caving in special thick coal seam and its impact on the loss of top coal. Int J Min Sci Technol, 26(4), 593–599.

    Article  Google Scholar 

  • Zhao, H. T., Tao, M., Li, X. B., Cao, W. Z., & Wu, C. Q. (2019). Estimation of spalling strength of sandstone under different pre-confining pressure by experiment and numerical simulation. International Journal of Impact Engineering, 133, 103359.

    Article  Google Scholar 

  • Zhao, Z. H., Wang, W. M., Dai, C. Q., & Yan, J. X. (2014). Failure characteristics of three-body model composed of rock and coal with different strength and stiffness. Transactions of the Nonferrous Metals Society of China, 24(5), 1538–1546.

    Article  Google Scholar 

  • Zhao, Z. H., Wang, W. M., Wang, L. H., & Dai, C. Q. (2015). Compression-shear strength criterion of coal–rock combination model considering interface effect. Tunnelling and Underground Space Technology, 47, 193–199.

    Article  Google Scholar 

  • Zhou, Y. X., Xia, K. W., Li, X. B., Li, H. B., Ma, G. W., Zhao, J., et al. (2012). Suggested methods for determining the dynamic strength parameters and mode-I fracture toughness of rock materials. International Journal of Rock Mechanics and Mining Sciences, 49(1), 105–112.

    Article  Google Scholar 

  • Zhu, S., Feng, Y., & Jiang, F. (2016). Determination of abutment pressure in coal mines with extremely thick alluvium stratum: a typical kind of rockburst mines in China. Rock Mechanics and Rock Engineering, 49(5), 1943–1952.

    Article  Google Scholar 

  • Zuo, J. P., Wang, Z. F., Zhou, H. W., Pei, J. L., & Liu, J. F. (2013). Failure behavior of a rock–coal–rock combined body with a weak coal interlayer. Int J Min Sci Technol, 23(6), 907–912.

    Article  Google Scholar 

Download references

Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (51374012 and 51174004).

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Authors and Affiliations

  1. School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan, 232001, Anhui, China

    Chengjie Li, Ying Xu, Peiyuan Chen, Hailong Li & Peijie Lou

  2. Engineering Research Center of Underground Mine Construction, Ministry of Education, Anhui University of Science and Technology, Huainan, 232001, Anhui, China

    Ying Xu & Peijie Lou

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  1. Chengjie Li
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  2. Ying Xu
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Correspondence to Peiyuan Chen.

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Li, C., Xu, Y., Chen, P. et al. Dynamic Mechanical Properties and Fragment Fractal Characteristics of Fractured Coal–Rock-Like Combined Bodies in Split Hopkinson Pressure Bar Tests. Nat Resour Res 29, 3179–3195 (2020). https://doi.org/10.1007/s11053-020-09656-w

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