Gold Science and Technology
img

Wechat

Adv. Search
Online Submission Peer Review Office Work

Gold Science and Technology ›› 2023, Vol. 31 ›› Issue (5): 803-810.doi: 10.11872/j.issn.1005-2518.2023.05.058

• Mining Technology and Mine Management • Previous Articles     Next Articles

Fracture Performances of Bedding Structure Slate Under Dynamic Loading

Yu ZHANG1,2(),Wenji WANG1,2,Jiaqi SUN3,Yonggang XIAO2   

  1. 1.China Construction Sixth Engineering Bureau Hydropower Construction Co. , Ltd. , Tianjin 300350, China
    2.Institute of Engineering Technology, China Construction Sixth Engineering Bureau Co. , Ltd. , Tianjin 300171, China
    3.College of Civil Engineering, Huaqiao University, Xiamen 361021, Fujian, China
  • Received:2023-04-19 Revised:2023-08-03 Online:2023-10-31 Published:2023-11-21

RichHTML

0

PDF (PC)

213

Abstract:

Bedding structure slate can be always observed in civil and mining engineering in recent years，their physical and mechanical properties are significantly controlled by the existing bedding planes，which are generally considered as weak links that can cause various geological disasters.The fracture behavior of bedding structure slate under dynamic loading is therefore a critical issue for the selection of blasting parameters，stability analysis of rock mass，collapse and burst disaster prevention in tunnel，drift，and other underground structures.In order to investigate the effects of the inclination angle of bedding plane and impact velocity on the dynamic fracture behavior of bedding structure slate，the dynamic impact test and numerical simulation method inserted cohesive element were conducted on the notched semicircular bending（NSCB） specimens by a split-Hopkinson pressure bar（SHPB）system.Tests of NSCB specimens under static loading were conducted for comparison，and the inserted cohesive element method was also used to develop the numerical model of layered NSCB specimens under dynamic loading.The fracture initiation and propagation process of the layered specimen under varied loading conditions were modeled.The results show：（1）Impact velocity and the inclination angle of bedding plane has obvious influence on the crack propagation，and three typical cracking paths can be found for NSCB specimens under both static and dynamic loading.（2）The crack propagates along the bedding plane and then directly propagates to the loading point，the cracking path evidently exhibits dependence on the impact velocity and the inclination angle of bedding plane.For specimens under static loading，the dominated crack is more likely to propagate along the bedding planes while the cracks tend to ignore bedding planes as the impact velocity or the inclination angle of bedding plane increases.At the same time，the crack length along the bedding plane is considerably reduced under dynamic loading than under static loading.（3）It is obvious that the impact velocity and the inclination angle of bedding plane have important influence on fracture toughness，it becomes larger with the increasing impact velocity or the inclination angle of bedding plane.

Key words: bedding structure, dynamic impact, numerical simulation, cracking mode, fracture toughness

CLC Number: 

  • U45

Fig.1

Connection diagram of two types of elements"

Fig.2

Constitutive model of cohesive element"

Fig.3

Geometric model of bedding structure rocks"

Fig.4

Finite element mesh for bedding structure slate with cohesive element"

Fig.5

SHPB test apparatus"

Table 1

Physical and mechanical parameters of bedding structure slate specimen"

θ/（°）fr/MPaEr/GPaμrρ/（kg·m-3）
0196.0095.1650.0922.62×103
1584.9953.6960.071
3070.8137.7680.230
4561.1224.4360.280
6083.1423.8030.318

Fig.6

Specimens preparing process"

Fig.7

Dynamic force balance check for specimens"

Fig.8

Comparison of failure modes of bedding structure slate under impact action"

Fig.9

Comparison of crack propagation paths under different loading velocities"

Fig.10

Influences of impact velocities on cracking length along bedding plane"

Fig.11

Finite element mesh for stress intensity factor calculation"

Fig.12

Dimensionless stress intensity factor"

Table 2

Dynamic impact test results of bedding structure slate"

倾角/（o）冲击速度/（m·s-1）峰值荷载/N断裂韧度/（MPa·mm0.5）
0123 928.32212.58
204 935.74267.09
256 453.85349.24
15124 296.16232.48
205 500.20297.64
256 152.45332.93
30123 920.10212.13
205 943.53321.63
256 646.04359.64
45125 131.72277.70
206 297.23340.77
257 238.87391.72
60125 290.28286.28
206 179.06334.37
258 088.75437.71
75125 416.12293.09
206 454.50349.28
257 558.56409.02
90126 505.87352.06
207 287.28394.34
257 947.93430.09

Fig.13

Fracture toughness for bedding structure slate under dynamic loading"

Chang X， Lu J Y， Wang S Y，et al，2017.Formation of cracks in layered rock considering layer thickness variations ［J］.Geophysical Journal International，210（3）：1623-1640.
Chen D F， Feng X T， Xu D P，et al，2016.Use of an improved ANN model to predict collapse depth of thin and extremely thin layered rock strata during tunnelling［J］.Tunnelling and Underground Space Technology，51：372-386.
Dai F， Xia K W，2010.Loading rate dependence of tensile strength anisotropy of barre granite［J］.Pure and Applied Geophysics，167（11）：1419-1432.
Deng Shuai， Zhu Zheming， Wang Lei，et al，2019.Study on the influence of in-situ stresses on dynamic fracture behaviors of cracks［J］.Chinese Journal of Rock Mechanics and Engineering，38（10）：1989-1999.
Gong Fengqiang， Wang Jin， Li Xibing，2018.The rate effect of compression characteristics and a unified model of dyna-mic increasing factor for rock materials［J］.Chinese Journal of Rock Mechanics and Engineering，37（7）：1586-1595.
Li Diyuan， Gao Feihong， Liu Meng，et al，2021.Research on failure mechanism of stratified sandstone with pre-cracked hole under combined static-dynamic loads［J］.Rock and Soil Mechanics，42（8）：2127-2140.
Li Qing， Guo Yang， Tian Ce，et al，2016.Effect of material crack flaws on dynamic fracture behavior［J］.Science Technology and Engineering，16（28）：1-5.
Li Xiang， Huai Zhen， Li Xibing，et al，2019.Study on fracture characteristics and mechanical properties of brittle rock based on crack propagation mode［J］.Gold Science and Technology，27（1）：41-51.
Lu C， Sun Q， Zhang W Q，et al，2017.The effect of high temperature on tensile strength of sandstone［J］.Applied Thermal Engineering，111：573-579.
Shen W L， Shi G C， Wang Y G，et al，2021.Tomography of the dynamic stress coefficient for stress wave prediction in sedimentary rock layer under the mining additional stress ［J］.International Journal of Mining Science and Technology，31（4）：653-663.
Shi X S， Liu D A， Yao W，et al，2018.Investigation of the anisotropy of black shale in dynamic tensile strength［J］.Arabian Journal of Geosciences，11（2）：1-11.
Shoeb M， Khan S A， Alam T，et al，2023.Dynamic stability analysis of metro tunnel in layered weathered sandstone［J］.Ain Shams Engineering Journal： 102258..
Wen Ming， Xu Jinyu， Wang Haoyu，et al，2017.Fractography analysis of sandstone failure under low temperature-dynamic loading coupling effects［J］.Chinese Journal of Rock Mechanics and Engineering，36（Supp.2）：3822-3830.
Wen S， Zhang C S， Chang Y L，2020.Dynamic compression characteristics of layered rock mass of significant strength changes in adjacent layers［J］.Journal of Rock Mechanics and Geotechnical Engineering，12（2）：353-365.
Xiao Fukun， Wang Houran， Zhang Rui，et al，2018.Fracture characteristics underlying sandstones under different impact loading［J］.Journal of Heilongjiang University of Science and Technology，28（6）：603-607.
Yang Liyun， Wang Qingcheng， Ding Chenxi，et al，2020.Experimental analysis on the mechanism of slotting blasting in deep rock mass［J］.Journal of Vibration and Shock，39（2）：40-46.
Zhang Sheng， Wang Qizhi， Xie Heping，2008.Size effect of rock dynamic fracture toughness ［J］.Explosion and Shock Waves，28（6）：544-551.
Zhao Fujun， Xie Shiyong， Pan Jianzhong，et al，2011.Numerical simulation and experimental investigation on rock fragmentation under combined dynamic and static loading［J］.Chinese Journal of Geotechnical Engineering，33（8）：1290-1295.
Zhao Guangming， Ma Wenwei， Meng Xiangrui，2015.Damage modes and energy characteristics of rock-like materials under dynamic load［J］.Rock and Soil Mechanics，36（12）：3598-3605.
Zhou Shengquan， Wang Rui， Tian Nuocheng，et al，2022.Research on dynamic mechanical properties of heat-treated granite under impact loading ［J］.Gold Science and Technology，30（2）：222-232.
邓帅，朱哲明，王磊，等，2019.原岩应力对裂纹动态断裂行为的影响规律研究［J］.岩石力学与工程学报，38（10）：1989-1999.
宫凤强，王进，李夕兵，2018.岩石压缩特性的率效应与动态增强因子统一模型［J］.岩石力学与工程学报，37（7）：1586-1595.
李地元，高飞红，刘濛，等，2021.动静组合加载下含孔洞层状砂岩破坏机制探究［J］.岩土力学，42（8）：2127-2140.
李清，郭洋，田策，等，2016.不同角度裂纹缺陷对材料动态断裂行为的影响［J］.科学技术与工程，16（28）：1-5.
李响，怀震，李夕兵，等，2019.基于裂纹扩展模型的脆性岩石破裂特征及力学性能研究［J］.黄金科学技术，27（1）：41-51.
闻名，许金余，王浩宇，等，2017.低温—动荷载耦合作用下砂岩破坏断口的形貌分析［J］.岩石力学与工程学报，36（增2）：3822-3830.
肖福坤，王厚然，张睿，等，2018.不同冲击加载作用下砂岩的破碎特征［J］.黑龙江科技大学学报，28（6）：603-607.
杨立云，王青成，丁晨曦，等，2020.深部岩体中切槽爆破机理实验分析［J］.振动与冲击，39（2）：40-46.
张盛，王启智，谢和平，2008.岩石动态断裂韧度的尺寸效应［J］.爆炸与冲击，28（6）：544-551.
赵伏军，谢世勇，潘建忠，等，2011.动静组合载荷作用下岩石破碎数值模拟及试验研究［J］.岩土工程学报，33（8）：1290-1295.
赵光明，马文伟，孟祥瑞，2015.动载作用下岩石类材料破坏模式及能量特性［J］.岩土力学，36（12）：3598-3605.
周盛全，王瑞，田诺成，等，2022.冲击荷载作用下热处理花岗岩动态力学特性研究［J］.黄金科学技术，30（2）：222-232.
[1] Wenfa SHAN, Xiancheng MAO, Zhankun LIU, Hao DENG, Jin CHEN, Wei ZHANG, Haizheng WANG, Xin YANG. Numerical Simulation of Metallogenic Processes of Dayingezhuang Gold Deposit in Jiaodong Peninsula and Its Prospecting Significance [J]. Gold Science and Technology, 2023, 31(5): 707-720.
[2] Weihua WANG, Kai LI, Ruixin HUANG. Study on the Effect of Thermal Shock on Dynamic Fracture Behavior of Granite [J]. Gold Science and Technology, 2023, 31(5): 752-762.
[3] Yanan ZHAO, Yihang ZHAO, Zhongming JIANG, Hongmin ZHAO. Preliminary Study on Static and Dynamic Stability of Canister for High-level Radioactive Nuclear Waste Disposal Based on Discrete Element Method [J]. Gold Science and Technology, 2023, 31(4): 592-604.
[4] Duiming GUO,Guoqing LI,Jie HOU,Nailian HU. Optimization of Local Ventilation Parameters of Deep Mine Excavation Roadway Based on FLUENT [J]. Gold Science and Technology, 2022, 30(5): 753-763.
[5] Heng MA,Jiayi GAO,Shihu LI,Ke GAO. Influence of Jet Angle of Twin Parallel Air Curtains on the Tunnel Airflow [J]. Gold Science and Technology, 2022, 30(5): 743-752.
[6] Zhanxing ZHOU,Kewei LIU,Xudong LI,Xiaohui HUANG,Sizhou MA. Numerical Simulation of Dynamic Response of Tunnel Lining Under Oil Tank Explosion [J]. Gold Science and Technology, 2022, 30(4): 612-622.
[7] Weihua WANG,Yang LIU,Liwei ZHANG,Henggen ZHANG. Numerical Simulation of Homogeneous Rock Mass Damage Caused by Two-hole Simultaneous Blasting Based on RHT Model [J]. Gold Science and Technology, 2022, 30(3): 414-426.
[8] Lingzhi ZHONG,Xiancheng MAO,Zhankun LIU,Keyan XIAO,Chuntan WANG,Wu CHEN. Ore-controlling Effect of Structural Geometry Features in the Sanshandao Gold Belt，Jiaodong Peninsula，China： Insights from Numerical Simulation [J]. Gold Science and Technology, 2022, 30(3): 352-365.
[9] Liqiang CHEN,Guoyan ZHAO,Yang LI,Wenjie MAO,Chengkai DANG,Boyang FANG. Deep Roadway Support and Its Effect Evaluation Under Excavation Unloading Disturbance [J]. Gold Science and Technology, 2022, 30(3): 438-448.
[10] Xuan FU,Linqi HUANG,Jiangzhan CHEN,Yangchun WU,Xibing LI. Meeting the Challenge of High Geothermal Ground Temperature Environ-ment in Deep Mining—Research on Geothermal Ground Temperature Simula-tion Platform of Rock True Triaxial Testing Machine [J]. Gold Science and Technology, 2022, 30(1): 72-84.
[11] Xiaodong FAN,Xiang LI,Ming TAO,Tubing YIN,Xibing LI. Study on Mode Ⅰ and Mode Ⅱ Fracture Characteristics of Granite Under Different Thermal Shock Process [J]. Gold Science and Technology, 2021, 29(6): 834-842.
[12] Dan HUANG,He CHEN,Zhijie ZHENG. Model of the Height of Overburden Fracture Zone Based on Void Conservation [J]. Gold Science and Technology, 2021, 29(6): 843-853.
[13] Hongwei DENG,Zhiming ZHONG,Guanglin TIAN. Numerical Simulation of Sectional Oxygen⁃Enrichment Ventilation in Plateau Mine [J]. Gold Science and Technology, 2021, 29(5): 698-708.
[14] Lulu XU,Qinli ZHANG,Ru FENG. Numerical Simulation of Backfill Strength Based on Optimization Results of Stope Structural Parameters [J]. Gold Science and Technology, 2021, 29(3): 421-432.
[15] Jingkai JIA,Gun HUANG,Long WANG,Qiang CHENG,Libing ZHEN. Study on a New Method of Weakening End Effect in Uniaxial Compression Test [J]. Gold Science and Technology, 2021, 29(3): 382-391.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!

©2018 Gold Science and Technology　

Telephone：0931-8277791　

E-mail: hjkx@lzb.ac.cn Postcode：730000　

Powered by Beijing Magtech Co. Ltd

陇ICP备17001318号-1