›› 2013, Vol. 34 ›› Issue (9): 2622-2628.

• Geotechnical Engineering • Previous Articles     Next Articles

Analysis of energy fractal and microseismic information characteristics about immediate rockbursts in deep tunnels with different excavation methods

YU Yang1，FENG Xia-ting1, 2，CHEN Bing-rui2，XIAO Ya-xun2，FENG Guang-liang2，LI Qing-peng2   

  1. 1. Key Laboratory of Ministry of Education for Safe Mining of Deep Metal Mines, Northeastern University, Shenyang 110819, China; 2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
  • Received:2013-04-28 Online:2013-09-11 Published:2013-09-13

PDF (Chinese)

1592

Abstract: Based on a large amount of microseismic informations and hundreds of rockbursts with different intensities occurring in the deep diversion tunnels of Jinping II hydropower station excavated with drill-and-blast method and tunnel boring machine (TBM), the energy release processes of immediate rockbursts with different excavation methods are compared; and energy distribution of microseismic events are analyzed by fractal theory. The achieved results are as follows: (1) Damage of rock mass are gathering and expanding in the processes of immediate rockbursts. (2) Elastic potential energy which stored within the rock mass has different ways of release with different excavation methods. (3) The energy fractal dimension values would increase continuously before the rockburst happens and they totally increase to a critical value when the rockburst approaches during drill-and-blast method excavation. (4) The energy fractal dimension values in TBM excavation which is bigger than that in drill-and-blast method can describe the mild and moderate rockbursts of the working face.

Key words: drill-and-blast method, immediate rockburst, seismic event, energy fractal, fractal dimension

CLC Number: 

  • TU 45
[1] SUN Hong, SONG Chun-yu, TENG Mu-wei, GE Xiu-run. Pore evolution characteristics of soft clay under loading [J]. Rock and Soil Mechanics, 2020, 41(1): 141-146.
[2] ZHAO Guo-yan, LI Zhen-yang, WU Hao, WANG En-jie, LIU Lei-lei. Dynamic failure characteristics of sandstone with non-penetrating cracks [J]. Rock and Soil Mechanics, 2019, 40(S1): 73-81.
[3] ZHANG Xiao-yan, CAI Yan-yan, ZHOU Hao-ran, YANG Yang, LI Yu-long, . Shear behaviors and fractal dimensions of carol sand at large shear strains [J]. Rock and Soil Mechanics, 2019, 40(2): 610-615.
[4] XIAO Xiao-chun, FAN Yu-feng, WU Di, DING Xin, WANG Lei, ZHAO Bao-you, . Energy dissipation feature and rock burst risk assessment in coal-rock combinations [J]. Rock and Soil Mechanics, 2019, 40(11): 4203-4212.
[5] ZENG Yin, LIU Jian-feng, ZHOU Zhi-wei, WU Chi, LI Zhi-cheng, . Creep acoustic emission and damage evolution of salt rock under uniaxial compression [J]. Rock and Soil Mechanics, 2019, 40(1): 207-215.
[6] XIANG Gao, LIU Jian-feng, LI Tian-yi, XU-YANG Meng-di, DENG Chao-fu, WU Chi，. Study of fractal and damage characteristic in the deformation and failure process of salt rack based on acoustic emission [J]. , 2018, 39(8): 2905-2912.
[7] MA Qin-yong, GAO Chang-hui，. Energy absorption and fractal characteristics of basalt fiber-reinforced cement- soil under impact loads [J]. , 2018, 39(11): 3921-3928.
[8] CHEN Yi, ZHANG Hu-yuan, YANG Long, . Analogy study on evolution of microstructure of earthen monument during natural weathering process [J]. , 2018, 39(11): 4117-4124.
[9] YANG Peng, HUA Xin-zhu, LIU Qin-jie, YANG Ming, CHENG Shi-xing, WU Biao，. Experimental study of dynamic evolution characteristic of floor fractal dimension of gob-side entry retaining with large section in deep mine [J]. , 2017, 38(S1): 351-358.
[10] WANG Zhi-gang, GUO Xiao-fei. Study of roof fissures of mining induced roadway in Shuanghe Coal Mine based on fractal theory [J]. , 2017, 38(8): 2377-2384.
[11] XIANG Guo-sheng, XU Yong-fu, CHEN Tao, JIANG Hao,. Fractal model for swelling deformation of bentonite in salt solution [J]. , 2017, 38(1): 75-80.
[12] YAO Shao-feng, ZHANG Zhen-nan, GE Xiu-run, QIU Yi-ping, XU Jin-ming，. Correlation between fracture energy and geometrical characteristic of mesostructure of marble [J]. , 2016, 37(8): 2341-2346.
[13] YU Bang-yong，CHEN Zhan-qing，WU Jiang-yu，LI Qiang，DING Qi-le,. Experimental study of compaction and fractal properties of grain size distribution of saturated crushed mudstone with different gradations [J]. , 2016, 37(7): 1887-1894.
[14] WU Ying，MA Gang，ZHOU Wei，YANG Li-fu. Optimization of gradation of rockfill materials based on the fractal theory [J]. , 2016, 37(7): 1977-1985.
[15] ZHAO Na, ZUO Yong-zhen, WANG Zhan-bin, YU Sheng-guan. Grading scale method for coarse-grained soils based on fractal theory [J]. , 2016, 37(12): 3513-3519.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] ZHAO Hong-bao, YIN Guang-zhi, LI Xiao-shuang. Experimental study of characteristics of tensile burned gritstone[J]. , 2010, 31(4): 1143 -1146 .
[2] KUANG Yu-chun, WU Kai-song, YANG Ying-xin, MA De-kun. Simulation model of drilling process of three-cone bit[J]. , 2009, 30(S1): 235 -238 .
[3] DU Wen-qi, WANG Gang. Statistical analysis of earthquake-induced sliding displacements of earth structures[J]. , 2011, 32(S1): 520 -0525 .
[4] YAN Zhi-hua, LIU Zhi-wei, LIU Hou-jian. Treatment and parameter selection of high slope of a power plant located in the terraces of Yellow River[J]. , 2009, 30(S2): 465 -468 .
[5] XU Zhen-hao , LI Shu-cai , LI Li-ping , HOU Jian-gang , SUI Bin , SHI Shao-shuai. Risk assessment of water or mud inrush of karst tunnels based on analytic hierarchy process[J]. , 2011, 32(6): 1757 -1766 .
[6] WEN Shi-qing , LIU Han-long , CHEN Yu-min. Analysis of load transfer characteristics of single grouted gravel pile[J]. , 2011, 32(12): 3637 -3641 .
[7] LI Shun-qun ，GAO Ling-xia ，CHAI Shou-xi. Significance and interaction of factors on mechanical properties of frozen soil[J]. , 2012, 33(4): 1173 -1177 .
[8] ZHONG Sheng ，WANG Chuan-ying ，WU Li-xin ，TANG Xin-jian ，WANG Qing-yuan. Borehole radar response characteristics of point unfavorable geo-bodies： forward simulation of its surrounding rock and filling condition[J]. , 2012, 33(4): 1191 -1195 .
[9] MENG Zhen, CHEN Jin-jian, WANG Jian-hua, YIN Zhen-yu. Study of model test on bearing capacity of screw piles in sand[J]. , 2012, 33(S1): 141 -145 .
[10] ZHAO Ying ，GUO En-dong ，WANG Qiong ，LIU Zhi . Estimate method of dislocation to seismic surface rupture under strike-slip fault[J]. , 2013, 34(5): 1403 -1408 .
Copyright © Rock and Soil Mechanics, All Rights Reserved.
Tel: 027-87198484, 87199252, 87199253, 87198752　E-mail: ytlx@whrsm.ac.cn
Powered by Beijing Magtech Co. Ltd