Abstract With the development of railway, water conservancy, mining and other projects, increasing caverns need to be excuvated in the deep. Dynaimic loads includying blasting excavation and fault-ship burst seriavsly affect the stability of surrounding rockmass of undergroud cavern. The finite difference software FLAC3D was used to simulate the surrounding rockmass stability of underground cavern under blasting and fault-slip burst conditions. The peak ground velocity(PGV)was used, and the mathematical relationship of the surrounding rock PGV under different focal mechanisms was obtained by fitting the Sadovs formula and the McGarrs formula. It was concluded that under the blasting load condition, the distance between the underground cavern and the source had a significant influence on the stability of the cavern. The Sadovs deformation formula could well characterize the PGV of the surrounding rockmass response, but the McGarrs deformation formula was not applicable. Under the condition of fault-slip, the Sadovs deformation formula and the McGarrs deformation formula did not have high goodness of fit, the slip angle had a greater influence on the stability of the cavern. Based on the above analysis, it was recommended that deep underground cavern support should consider the influence of the source, such as PGV. For the source of fault-slip, the influence of the slip angle on PGV should be considered. The above conclusions provide data support and technical basis for the excavation and support of geotechnical engineering underground cavern.
DONG Longjun,WANG Junhui,MA Ju. Response and support suggestions of surrounding rock of underground cavern under different microseismic source mechanism[J]. Hazard Control in Tunnelling and Underground Engineering,
2019, 1(3): 68-76.
杨小林,侯爱军,梁为民,等. 隧道掘进爆破的损伤机理与振动危害[J]. 煤炭学报, 2008, 33(4): 400-404. YANG Xiaolin, HOU Aijun, LIANG Weimin, et al. Damage mechanism and vibration effects in tunnel blasting[J]. Journal of China Coal Society, 2008, 33(4): 400-404.
[2]
王薇,王连捷,王红才,等. 青藏铁路昆仑山隧道稳定性分析[J]. 地球学报, 2002, 23(4): 359-362. WANG Wei, WANG Lianjie, WANG Hongcai, et al. Stability analysis of Kunlun Mountain Tunnel for Qinghai-Tibet Railway[J]. Acta Geoscientia Sinica, 2002, 23(4): 359-362.
[3]
陈国庆, 冯夏庭, 周辉, 等. 锦屏二级水电站引水隧洞长期稳定性数值分析[J]. 岩土力学, 2007(增刊1): 417-422. CHEN Guoqing, FENG Xiating, Zhou Hui, et al. Numerical analysis of the long-term stability of the seepage tunnel in Jinping II Hydropower Station[J]. Rock and Soil Mechanics, 2007(Suppl.1): 417-422.
[4]
董陇军,李夕兵,唐礼忠,等. 无需预先测速的微震震源定位的数学形式及震源参数确定[J]. 岩石力学与工程学报,2011,30(10): 2057-2067. DONG Longjun, LI Xibing, TANG Lizhong, et al. Mathematical functions and parameters for microseismic source location without pre-measuring speed[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(10): 2057-2067.
[5]
董陇军,孙道元,李夕兵,等. 微震与爆破事件统计识别方法及工程应用[J]. 岩石力学与工程学报, 35(7): 1423-1433. DONG Longjun, SUN Daoyuan, LI Xibing, et al. A statistical method to identify blasts and microseismic events and its engineering application[J]. Chinese Journal of Rock Mechanics and Engineering, 35(7): 1423-1433.
[6]
DONG L J, WESSELOO J, POTVIN Y, et al. Discrimination of mine seismic events and blasts using the fisher classifier,naïve bayesian classifier and logistic regression[J]. Rock Mechanics and Rock Engineering, 2015, 48(11): 1-29.
[7]
DONG L J, SUN D Y, LI X B, et al. Interval non-probabilistic reliability of surrounding jointed rockmass considering microseismic loads in mining tunnels[J]. Tunnelling and Underground Space Technology, 2018, 81: 326-335.
[8]
DONG L J, WANG J H, LI X B, et al. Dynamic stability analysis of rockmass: a review [J]. Advances in Civil Engineering, 2018(4): 1-22.
[9]
LI X B, LI C J, CAO W Z, et al. Dynamic stress concentration and energy evolution of deep-buried tunnels under blasting loads[J]. International Journal of Rock Mechanics and Mining Sciences, 2018, 104: 131-146.
[10]
YANG J H, LU W B, HU Y G, et al. Numerical simulation of rock mass damage evolution during deep-buried tunnel excavation by drill and blast[J]. Rock Mechanics and Rock Engineering, 2015, 48(5): 2045-2059.
[11]
LI X P, HUANG J H, LUO Y, et al. Numerical simulation of blast vibration and crack forming effect of rock-anchored beam excavation in deep underground caverns[J]. Shock and Vibration, 2017: 1-13.
[12]
ZHENG X, HUA J, ZHANG N, et al. Simulation of the load evolution of an anchoring system under a blasting impulse load using FLAC3D[J]. Shock and Vibration, 2015: 1-8.
[13]
MORTAZAVI A, ALAVI F T.A numerical study of the behavior of fully grouted rockbolts under dynamic loading[J]. Soil Dynamics and Earthquake Engineering, 2013, 54: 66-72.
[14]
SJÖBERG J, PERMAN F, QUINTEIRO C, et al. Numerical analysis of alternative mining sequences to minimise potential for fault slip rockbursting[J]. Mining Technology, 2012, 121(4): 226-235.
[15]
MA J, DONG L J, ZHAO G Y, et al. Qualitative method and case study for ground vibration of tunnels induced by fault-slip in underground mine[J]. Rock Mechanics and Rock Engineering, 2018: 1-15.
[16]
陈光辉, 李夕兵, 张平, 等. 基于改进Haskell模型的断层滑移型岩爆震源模拟研究[J]. 中国安全科学学报, 2016, 26(8):122-127. CHEN Guanghui, LI Xibing, ZHANG Ping, et al. Simulation of fault slip rockburst seismic source based on improved Haskell model[J]. China Safety Science Journal, 2016, 26(8):122-127.
[17]
陈光辉, 李夕兵, 董陇军, 等. 基于震源机制的断层滑移型岩爆岩体震动响应研究[J]. 中国安全科学学报, 2016, 26(11): 121-126. CHEN Guanghui, LI Xibing, DONG Longjun, et al. Dynamic response of rockmass under fault-slip rockburst based on focal mechanism[J]. China Safety Science Journal, 2016, 26(11): 121-126.
[18]
陈光辉, 李夕兵, 董陇军. 考虑断层滑移应力波辐射特征的巷道支护参数优化研究[J]. 采矿与安全工程学报, 2017, 34(4): 715-722. CHEN Guanghui, LI Xibing, DONG Longjun. Optimization of tunnel support parameters with consideration of seismic wave radiation pattern in the fault-slip burst[J]. Journal of Mining and Safety Engineering, 2017, 34(4): 715-722.
[19]
王志荣,李潇旋,陈玲霞. 基于断层带瓦斯突出的巷道冲击波对围岩的三维动力效应[J]. 岩石力学与工程学报,2015, 34(9):1796-1804. WANG Zhirong, LI Xiaoxuan, CHEN Lingxia.Three-dimensional dynamic effect of gas burst shock wave on roadway surrounding rock based on fault damage[J]. Chinese Journal of Rock Mechanics and Engineering, 2015, 34(9):1796-1804.
MCGARR A, GREEN RW, SPOTTISWOODE S M. Strong ground motion of mine tremors: some implications for near-source ground motion parameters[J]. Bulletin of the Seismological Society of America, 1981, 71(1): 295-319.
[22]
AKI K, RICHARDS P G. Quantitative seismology theory and methods[M]. San Francisco, USA: Freeman W H, 1980.
[23]
POTVIN Y, WESSELOO J. Towards an understanding of dynamic demand on ground support[J]. Journal of the Southern African Institute of Mining and Metallurgy, 2013, 113(12): 913-922.
