Influence of vibration loading on impact crack propagation and energy utilization efficiency in green sandstone

ZHAO Huanshuai; PAN Yongtai; YU Chao; QIAO Xin; CAO Xingjian; NIU Xuechao

doi:10.16511/j.cnki.qhdxxb.2024.22.029

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Journal of Tsinghua University(Science and Technology) ›› 2024, Vol. 64 ›› Issue (12) : 2155-2165. DOI: 10.16511/j.cnki.qhdxxb.2024.22.029

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Influence of vibration loading on impact crack propagation and energy utilization efficiency in green sandstone

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Abstract

[Objective] In rock-crushing processes, external loading methods are important factors affecting the mechanical properties and fracture behavior of rocks. Among these loading methods, vibration and impact methods are the most common ones. However, previous research has mainly focused on macroscopic failure features and energy dissipation properties under the singular loading of vibration or impact. Research on the composite loading of vibration and impact is relatively scarce, and few studies have investigated the influence of vibration loading on the microscopic fracture characteristics and energy evolution during rock impacts. In particular, quantitative characterization studies are lacking. The research on the influence of vibration loading on the propagation of impact cracks and the energy utilization efficiency in rocks has significant academic and engineering applications to fully adapt to the needs of modern mine construction and high efficiency, energy saving, and green production. [Methods] The quasi-brittle green sandstone material, commonly used in rock-crushing operations, was taken as the research object. The macro/micromechanical response relationship of green sandstone was established by integrating indoor experiments with microscopic parameter calibration. The parallel bonding model was adopted, and two loading methods — impact and composite loading of vibration and impact — were compared and analyzed to investigate the influence of vibration loading on the propagation of impact cracks and the energy utilization efficiency in the failure process of green sandstone. The analysis was conducted using the particle flow code (PFC). [Results] The research results indicate that under the same impact velocity, increasing the frequency or amplitude of vibration leads to an increasing trend in the number of cracks in green sandstone. Under the two loading methods, the maximum number of cracks in green sandstone shows a nearly linear increase as the impact velocity increases, with the majority being tensile cracks. The distribution characteristics of cracks exhibit the X-shaped conjugate slope. However, the growth rate of cracks is relatively high under composite loading of vibration and impact. The quantitative characterization of the increase in the number of cracks and impact velocity under vibration loading is established. Under equivalent impact velocity, as the frequency and amplitude increase, there is a corresponding increase in both the proportion of vibration input energy and the energy utilization efficiency in green sandstone. However, as the impact velocity increases, the proportion of vibration input energy within the total input energy in green sandstone decreases. Concurrently, the maximum energy utilization efficiency shows a trend of rapid increase followed by a decrease, with the maximum increase reaching 0.725%. [Conclusions] In practical rock-crushing applications, appropriately increasing vibration loading can exacerbate the damage and deterioration of rocks. This process significantly enhances the energy utilization efficiency with lower energy input. This study preliminarily explores the impact of vibration loading on the propagation of impact cracks and the energy utilization efficiency in green sandstone to provide a reference for the rational selection of parameters in rock-crushing processes.

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green sandstone / vibration loading / crack propagation / fracture energy

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ZHAO Huanshuai, PAN Yongtai, YU Chao, QIAO Xin, CAO Xingjian, NIU Xuechao. Influence of vibration loading on impact crack propagation and energy utilization efficiency in green sandstone[J]. Journal of Tsinghua University(Science and Technology). 2024, 64(12): 2155-2165 https://doi.org/10.16511/j.cnki.qhdxxb.2024.22.029

References

[1] 谢和平, 彭瑞东, 鞠杨, 等. 岩石破坏的能量分析初探[J]. 岩石力学与工程学报, 2005, 24(15): 2603-2608. XIE H P, PENG R D, JU Y, et al. On energy analysis of rock failure[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(15): 2603-2608. (in Chinese)
[2] HOEK E, BIENIAWSKI Z T. Brittle fracture propagation in rock under compression[J]. International Journal of Fracture Mechanics, 1965, 1(3): 137-155.
[3] YAHYAEI M, HILDEN M, SHI F, et al. Comminution[M]. Cham, Switzerland: Springer International Publishing, 2016.
[4] ZHANG Z X, OUCHTERLONY F. Energy requirement for rock breakage in laboratory experiments and engineering operations: A review[J]. Rock Mechanics and Rock Engineering, 2022, 55(2): 629-667.
[5] 夏晓鸥, 罗秀建. 惯性圆锥破碎机[M]. 北京: 冶金工业出版社, 2015. XIA X O, LUO X J. Inertia cone crusher[M]. Beijing: Metallurgical Industry Press, 2015. (in Chinese)
[6] WANG K, FENG G R, QI T Y, et al. Experimental investigation on dynamic mechanical characteristics and fracture mechanism of coal under repeated impact loads[J]. Arabian Journal of Geosciences, 2021, 14(14): 1311.
[7] 李成杰, 徐颖, 叶洲元. 冲击荷载下类煤岩组合体能量耗散与破碎特性分析[J]. 岩土工程学报, 2020, 42(5): 981-988. LI C J, XU Y, YE Z Y. Energy dissipation and crushing characteristics of coal-rock-like combined body under impact loading[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(5): 981-988. (in Chinese)
[8] GAN D Q, GAO F, ZHANG Y P, et al. Effects of the shape and size of irregular particles on specific breakage energy under drop weight impact[J]. Shock and Vibration, 2019, 2019: 2318571.
[9] 周强, 潘永泰, 郭庆, 等. 不同冲击比能下煤岩颗粒破碎的分形演化[J]. 煤炭工程, 2020, 52(4): 143-148. ZHOU Q, PAN Y T, GUO Q, et al. Fractal evolution of particle fragmentation of ore and rock under different impact energy[J]. Coal Engineering, 2020, 52(4): 143-148. (in Chinese)
[10] ZHANG L, WANG X F, WANG J Y, et al. Research on fracture characteristics and energy dissipation of hard rock under the excitation of ultrasonic vibration[J]. Geofluids, 2022, 2022: 8351316.
[11] 尹崧宇. 超声波振动下花岗岩裂纹变化特性的研究[D]. 长春: 吉林大学, 2017. YIN S Y. Research on the characteristics of granite crack variation under ultrasonic vibration[D]. Changchun: Jilin University, 2017. (in Chinese)
[12] GUO Q, PAN Y T, ZHOU Q, et al. Kinetic energy calculation in granite particles comminution considering movement characteristics and spatial distribution[J]. Minerals, 2021, 11(2): 217.
[13] 张磊. 超声振动激励下坚硬岩石高效破碎基础研究[D]. 徐州: 中国矿业大学, 2021. ZHANG L. Basic research on high efficient crushing of hard rock under ultrasonic vibration excitation[D]. Xuzhou: China University of Mining and Technology, 2021. (in Chinese)
[14] 石崇, 张强, 王盛年. 颗粒流(PFC5.0)数值模拟技术及应用[M]. 北京: 中国建筑工业出版社, 2018. SHI C, ZHANG Q, WANG S N. Numerical simulation technology and application with particle flow code (PFC5.0)[M]. Beijing: China Architecture & Building Press, 2018. (in Chinese)
[15] POTYONDY D O, CUNDALL P A. A bonded-particle model for rock[J]. International Journal of Rock Mechanics and Mining Sciences, 2004, 41(8): 1329-1364.
[16] 阿比尔的, 郑颖人, 冯夏庭, 等. 平行黏结模型宏细观力学参数相关性研究[J]. 岩土力学, 2018, 39(4): 1289-1301. ERDI A, ZHENG Y R, FENG X T, et al. Relationship between particle micro and macro mechanical parameters of parallel-bond model[J]. Rock and Soil Mechanics, 2018, 39(4): 1289-1301. (in Chinese)
[17] 程爱平, 舒鹏飞, 邓代强, 等. 单轴压缩下尾砂胶结充填体细观能量耗散与损伤表征研究[J]. 采矿与安全工程学报, 2022, 39(6): 1227-1234. CHENG A P, SHU P F, DENG D Q, et al. Study on mesoscale energy dissipation and damage characterization of cemented tailings backfill under uniaxial compression[J]. Journal of Mining & Safety Engineering, 2022, 39(6): 1227-1234. (in Chinese)
[18] 徐小敏, 凌道盛, 陈云敏, 等. 基于线性接触模型的颗粒材料细-宏观弹性常数相关关系研究[J]. 岩土工程学报, 2010, 32(7): 991-998. XU X M, LING D S, CHEN Y M, et al. Correlation of microscopic and macroscopic elastic constants of granular materials based on linear contact model[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(7): 991-998. (in Chinese)
[19] 佟安, 张军徽, 武娜. 红砂岩单轴压缩宏细观参数映射关系研究[J]. 力学与实践, 2020, 42(2): 202-208. TONG A, ZHANG J H, WU N. Macro and microscopic parameter mapping relationship for red sandstone[J]. Mechanics in Engineering, 2020, 42(2): 202-208. (in Chinese)
[20] 龚囱, 包涵, 王文杰, 等. 红砂岩破坏过程声发射震源演化规律及其主频特征[J]. 煤炭学报, 2022, 47(6): 2326-2339. GONG C, BAO H, WANG W J, et al. Evolution law and dominant frequency characteristics of acoustic emission sources during red sandstone failure process[J]. Journal of China Coal Society, 2022, 47(6): 2326-2339. (in Chinese)
[21] 于利强, 姚强岭, 徐强, 等. 加载速率影响下裂隙细砂岩裂纹扩展试验及数值模拟研究[J]. 煤炭学报, 2021, 46(11): 3488-3501. YU L Q, YAO Q L, XU Q, et al. Experimental and numerical simulation study on crack propagation of fractured fine sandstone under the influence of loading rate[J]. Journal of China Coal Society, 2021, 46(11): 3488-3501. (in Chinese)
[22] 赵环帅, 潘永泰, 余超, 等. 锤式破碎机冲击速率对青砂岩破碎效果及能量利用效率的影响[J/OL]. 煤炭科学技术, 2024: 1-13.[2024-04-15]. http://kns.cnki.net/kcms/detail/11.2402.TD.20240205.1820.005.html. ZHAO H S, PAN Y T, YU C, et al. The influence of impact velocities of hammer crusher on the crushing effect and utilization efficiency of fracture energy in green sandstone[J/OL]. Coal Science and Technology, 2024: 1-13.[2024-04-15]. http://kns.cnki.net/kcms/detail/11.2402.TD.20240205.1820.005.html. (in Chinese)
[23] 丁桐桐, 徐建华, 李远安, 等. 基于离散单元法的立轴冲击破碎机成砂率数值计算[J]. 应用力学学报, 2021, 38(5): 2018-2024. DING T T, XU J H, LI Y A, et al. Numerical calculation of sand formation rate of vertical shaft impact crusher based on discrete element method[J]. Chinese Journal of Applied Mechanics, 2021, 38(5): 2018-2024. (in Chinese)
[24] LIN Z Y, WANG Y S, TANG C S, et al. Discrete element modelling of desiccation cracking in thin clay layer under different basal boundary conditions[J]. Computers and Geotechnics, 2021, 130: 103931.