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| Experimental study of the effect of loading frequency on the impact
rockburst of sandstone |
| LIU Dongqiao1，HU Tianxiang1，2，WANG Yang1，3，LING Kai1，2，HAN Zijie1，2，HE Manchao1 |
| (1. State Key Laboratory for Geomechanics and Deep Underground Engineering，China University of Mining and Technology(Beijing)，Beijing 100083，China；2. School of Mechanics and Civil Engineering，China University of Mining and Technology(Beijing)，Beijing 100083，China；3. Institute of Geomechanics，Chinese Academy of Geological Sciences，Beijing 100081，China) |
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Abstract After the excavation unloading of rock mass，the formed roadway structures are in a relatively stable state. Disturbed by engineering disturbance，strain energy is accumulated in the rock mass surrounding the roadway. The surrounding rock mass may fail catastrophically under such combined dynamic and static loads，which is defined as impact rockburst. In this paper，the rockburst experiment was carried out under different dynamic load frequencies. Using the image acquisition system，pictures of the whole process of destructive rockburst inside the sample cavern were captured to reveal the destructive characteristics of impact rockburst. Resutls show that the incubation and destruction process of the rockburst can be divided into the calm stage，the particle ejection stage，the local drum stage，the detrital exfoliation stage，the penetration failure stage and the rockburst stage. The cross-section of the blast crater of a rock burst is V-shaped. As the frequency of the dynamic load increases，the damage of the V-shaped blast crater becomes more concentrated，and the blast crater becomes narrower and deeper. The dynamic load frequency thus has a significant impact on the intensity of impact rockburst failure. With increasing the dynamic loading frequency，the acoustic emission increases in the rockburst stage，releasing more strain energy. In addition，the fragmentation degree and the intensity of rockburst also increase with the loading frequency.
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| [1] HE M C，REN F Q，LIU D Q. Rockburst mechanism research and its control[J]. International Journal of Mining Science and Technology，2018，28(5)：829–837.
[2] 王明洋，周泽平，钱七虎. 深部岩体的构造和变形与破坏问题[J]. 岩石力学与工程学报，2006，25(3)：448–455.(WANG Mingyang，ZHOU Zeping，QIAN Qihu. Tectonic，deformation and failure problems of deep rock mass[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(3)：448–455.(in Chinese))
[3] 钱七虎. 岩爆、冲击地压的定义、机制、分类及其定量预测模型[J]. 岩土力学，2014，35(1)：1–6.(QIAN Qihu. Definition，mechanism，classification and quantitative forecast model for rockburst and pressure bump[J]. Rock and Soil Mechanics，2014，35(1)：1–6.(in Chinese))
[4] 周 辉，卢景景，胡善超，等. 开挖断面曲率半径对高应力下硬脆性围岩板裂化的影响[J]. 岩土力学，2016，37(1)：140–146.(ZHOU Hui，LU Jingjing，HU Shanchao，et al. Influence of curvature radius of tunnels excavation section on slabbing of hard brittle rockmass under high stress[J]. Rock and Soil Mechanics，2016，37(1)：140–146.(in Chinese))
[5] 李天斌，钟雨奕，潘皇宋，等. 高地应力隧道岩爆破坏特征物理模型试验研究[J]. 地下空间与工程学报，2019，15(6)：1 639–1 645.(LI Tianbin，ZHONG Yuyi，PAN Huangsong，et al. Physical model test on rock burst failure characteristics of high ground stress tunnel[J]. Journal of Underground Space and Engineering，2019，15(6)：1 639–1 645.(in Chinese))
[6] SU G S，CHEN Z Y，JU J W，et al. Experimental study of the dynamically induced rockburst of a rock wall with double free faces[J]. International Journal of Damage Mechanics，2019，28(4)：611–637.
[7] 苗金丽，何满潮，李德建，等. 花岗岩应变岩爆声发射特征及微观断裂机制[J]. 岩石力学与工程学报，2009，28(8)：1 593–1 603. (MIAO Jinli，HE Manchao，LI Dejian，et al. Acoustic emission characteristics of granite under strain rockburst test and its micro-fracture mechanism[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(8)：1 593–1 603.(in Chinese))
[8] 何满潮，刘冬桥，宫伟力，等. 冲击岩爆试验系统研发及试验[J]. 岩石力学与工程学报，2014，33(9)：1 729–1 739.(HE Manchao，LIU Dongqiao，GONG Weili，et al. Development of a testing system for impact rockbursts[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(9)：1 729–1 739.(in Chinese))
[9] 刘冬桥，何满潮，汪承超，等. 动载诱发冲击地压的实验研究[J]. 煤炭学报，2016，41(5)：1 099–1 105.(LIU Dongqiao，HE Manchao，WANG Chengchao，et al. Experimental study on rock burst induced by dynamic load[J]. Journal of China Coal Society，2016，41(5)：1 099–1 105.(in Chinese))
[10] 司雪峰，宫凤强，罗 勇，等. 深部三维圆形洞室岩爆过程的模拟试验[J]. 岩土力学，2018，39(2)：621–634.(SI Xuefeng，GONG Fengqiang，LUO Yong，et al. Experimental simulation on rockburst process of deep three-dimensional circular cavern[J]. Rock and Soil Mechanics，2018，39(2)：621–634.(in Chinese))
[11] 刘冬桥，张晓云，何满潮，等. 砂岩冲击岩爆实验碎屑研究[J]. 矿业科学学报，2018，3(3)：246–252.(LIU Dongqiao，ZHANG Xiaoyun，HE Manchao，et al. Study on sandstone fragments from impact rockburst experiments[J]. Journal of Mining Science and Technology，2018，3(3)：246–252.(in Chinese))
[12] 王 炀，何满潮，刘冬桥，等. 深部椭圆形洞室围岩冲击岩爆实验研究[J]. 岩石力学与工程学报，2021，40(11)：2 214–2 228.(WANG Yang，HE Manchao，LIU Dongqiao，et al. Experimental study on impact rockburst of surrounding rock in deep elliptical caverns[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(11)：2 214–2 228.(in Chinese))
[13] 刘岩鑫，蒋剑青，苏国韶，等. 弱动力扰动对花岗岩圆形隧洞岩爆影响的试验研究[J]. 爆炸与冲击，2020，40(9)：88–99.(LIU Yanxin，JIANG Jianqing，SU Guoshao，et al. Experimental study on influence of weak dynamic disturbance on rockburst of granite in a circular tunnel[J]. Explosion and Shock Waves，2020，40(9)：88–99.(in Chinese))
[14] 李夕兵，宫凤强，王少锋，等. 深部硬岩矿山岩爆的动静组合加载力学机制与动力判据[J]. 岩石力学与工程学报，2019，38(4)：708–723.(LI Xibing，GONG Fengqiang，WANG Shaofeng，et al. Coupled static-dynamic loading mechanical mechanism and dynamic criterion of rock burst in deep hard rock mines[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(4)：708–723.(in Chinese))
[15] 赵 凯，乔春生，罗富荣，等. 不同频率循环荷载下石灰 岩疲劳特性试验研究[J]. 岩石力学与工程学报，2014，33(增2)：3 466–3 475. (ZHAO Kai，QIAO Chunsheng，LUO Furong，et al. Experimental study of fatigue characteristics of limestone samples subjected to uniaxial cyclic loading with different frequencies[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(Supp.2)：3 466–3 475.(in Chinese))
[16] 王 宇，高少华，孟华君，等. 不同频率增幅疲劳荷载下双裂隙花岗岩破裂演化声发射特性与裂纹形态研究[J]. 岩石力学与工程学报，2021，40(10)：1 976–1 989.(WANG Yu，GAO Shaohua，MENG Huajun，et al. Investigation on acoustic emission characteristics and fracture network patterns of pre-flawed granite subjected to increasing-amplitude fatigue loads[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(10)：1 976–1 989.(in Chinese))
[17] 苏国韶，胡李华，冯夏庭，等. 低频周期扰动荷载与静载联合作用下岩爆过程的真三轴试验研究[J]. 岩石力学与工程学报，2016，35(7)：1 309–1 322.(SU Guoshao，HU Lihua，FENG Xiating，et al. True triaxial experimental study of rockburst process under low frequency cyclic disturbance load combined with static load[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(7)：1 309–1 322. (in Chinese))
[18] 赵光明，刘崇岩，许文松，等. 扰动诱发高应力卸荷岩体破坏特征实验研究[J]. 煤炭学报，2021，46(2)：412–423.(ZHAO Guangming，LIU Chongyan，XU Wensong，et al. Experimental study on the failure characteristics of high stress unloading rock mass induced by disturbance[J]. Journal of China Coal Society，2021，46(2)：412–423.(in Chinese))
[19] WANG Y，CHUN Z，HE M C，et al. Fragmentation characteristics analysis of sandstone fragments for impact rockburst under different dynamic loading frequency[J]. Geotechnical and Geological Engineering，2019，37(4)：2 715–2 727.
[20] 黄禄渊，杨树新，崔效锋，等. 华北地区实测应力特征与断层稳定性分析[J]. 岩土力学，2013，34(增1)：204–213.(HUANG Luyuan，YANG Shuxin，CUI Xiaofeng，et al. Analysis of characteristics of measured stress and stability of faults in North China[J]. Rock and Soil Mechanics，2013，34(Supp.1)：204–213.(in Chinese))
[21] 黄润秋，黄 达. 卸荷条件下花岗岩力学特性试验研究[J]. 岩石力学与工程学报，2008，27(11)：2 205–2 213.(HUANG Runqiu，HUANG Da. Experimental study on mechanical properties of granite under loading conditions[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(11)：2 205–2 213.(in Chinese))
[22] 何满潮，杨国兴，苗金丽，等. 岩爆实验碎屑分类及其研究方法[J]. 岩石力学与工程学报，2009，28(8)：1 521–1 529.(HE Manchao，YANG Guoxing，MIAO Jinli，et al. Classification and research methods of rockburst experimental fragments[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(8)：1 521–1 529.(in Chinese))
[23] ROSIN P，RAMMLER E. The laws governing the fineness of powdered coal[J]. Journal of Institute of Fue，1933，(7)：29–36.
[24] 李德建，贾雪娜，苗金丽，等. 花岗岩岩爆试验碎屑分形特征分析[J]. 岩石力学与工程学报，2010，29(增1)：3 280–3 289.(LI Dejian，JIA Xuena，MIAO Jinli，et al. Analysis of fractal characteristics of fragment from rockburst test of granite[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(Supp.1)：3 280–3 289.(in Chinese))
[25] 徐芝纶. 弹性力学简明教程[M]. 3 版. 北京：高等教育出版社，2002：67–72.(XU Zhilun. A concise course in elasticity[M]. 3rd ed. Beijing：Higher Education Press，2002：67–72.(in Chinese))
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2022, Vol. 41 
