JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2017, Vol. 47 ›› Issue (2): 26-31.doi: 10.6040/j.issn.1672-3961.0.2017.098

Previous Articles     Next Articles

Energy dissipating rate analysis of N-J hydropower station by pressure relief technique

CHEN Fangming1, GU Jianghong1, ZHU Bin1, WANG Luyu2   

  1. 1. No. 3 Engineering Co., Ltd., China Gezhouba Group, Xi'an 710000, Shaanxi, China;
    2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, Hubei, China
  • Received:2017-02-14 Online:2017-04-20 Published:2017-02-14

PDF (PC)

468

Abstract: In order to study energy dissipating rate of stress relief technique, the drill core pressure relief and blasting analysis of rock burst area of TBM diversion tunnel in Pakistan N-J Hydropower Station were carried out. Borehole pressure relief and pre-spliting blasting of 108 mm diameter drill core were simulated. The borehole pressure relief and pre-spliting blasting was simulated in spacing of 0.5, 1.0, 1.5, 2.0 and 2.5 m. The numerical simulation results showed that the stress relief in TBM tunnel could reduce stress concentration phenomenon. The effect of pre-spliting blasting was much better than drill core pressure relief. Energy dissipation rate of pre-splitting blasting pressure relief reached 27%, while the energy dissipation rate of the simple borehole pressure relief method was only 5.9%. Pre-spliting blasting pressure relief method should be used to reduce the pressure in the rock burst area in project site. In the condition of pre-splitting blasting, the relationship between energy dissipation rate and spacing is basically exponential growth trend. For drill core pressure relief, the relationship between energy dissipation rate and spacing is positive correlation. It is important that layout of drill spacing should be reasonable planning.

Key words: rock burst, pre-spliting blasting, energy dissipating rate, N-J hydropower station, borehole pressure relief

CLC Number: 

  • TU416.217
[1] 姜耀东,潘一山,姜福兴,等. 我国煤炭开采中的冲击地压机理和防治[J]. 煤炭学报, 2014, 39(2):205-213. JIANG Yaodong, PAN Yishan, JIANG Fuxing, et al. State of the art review on mechanism and prevention of coal bumps in China[J]. Journal of China Coal Society, 2014, 39(2):205-213.
[2] KAISER P K, MACCREATH D R, TANNANT D D. Canadian rockburst support handbook[M]. Sudbury, Canada: Geomechanics Research Centre, 1996.
[3] 武选正, 李名川, 伍宇腾. 锦屏水电枢纽辅助洞工程岩爆现象分析及防治措施[J].岩石力学与工程学报,2008,38(3):28-33. WU Xuanzheng, LI Mingchuan, WU Yuteng. Analysis and prevention measures for rockburst in the auxiliary tunnel of the Jinping Hydropower State[J]. Chinese Journal of Rock Mechanics and Engineering, 2008, 38(3):28-33.
[4] 徐奴文, 唐春安,周济芳,等. 锦屏二级水电站施工排水洞岩爆数值模拟[J].山东大学学报(工学版),2009,39(4):134-139. XU Nuwen, TANG Chunan, ZHOU Jifang, et al. Numerical simulation of rockburst on the drain tunnel in the Jinping Second Level Hydropower Station[J]. Journal of Shandong University(Engineering Science), 2009, 39(4):134-139.
[5] 何满潮,苗金丽,李德建,等. 深部花岗岩试样岩爆过程实验研究[J]. 岩石力学与工程学报, 2007, 26(5):865-876. HE Manchao, MIAO Jinli, LI Dejian, et al. Experimental study on rockburst processes of granite specimen at great depth[J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(5):865-876.
[6] 顾金才,范俊奇,孔福利,等. 抛掷型岩爆机制与模拟试验技术[J].岩石力学与工程学报, 2014,33(6):1081-1089. GU Jincai, FAN Junqi, KONG Fuli. Mechanism of ejective rockburst and model tesring technology l[J]. Chinese Journal of Rock Mechanics and Engineering, 2014, 33(6):1081-1089.
[7] MENG F Z, ZHOU H, WANG Z Q, et al. Experimental study on the prediction of rockburst hazards induced by dynamic structural plane shearing in deeply buried hard rock tunnels[J]. International Journal of Rock Mechanics & Mining Sciences, 2016, 86:210-223.
[8] 张梅英,袁建新,李廷芥.单轴压缩过程中岩石变形破坏机理[J].岩石力学与工程学报,1998,17(1):1-8. ZHANG Meiying, YUAN Jianxin, LI Tingjie. Mechanism of deform action and failure for rock in uniaxial compression test[J]. Chinese Journal of Rock Mechanics and Engineering, 1998, 17(1):1-8.
[9] 马天辉,唐春安,唐烈先,等. 基于微震监测技术的岩爆预测机制研究[J]. 岩石力学与工程学报, 2016, 35(3):470-483. MA Tianhui, TANG Chunan, TANG Xianlie, et al. Mechanism of rock burst forcasting based on micro-seismic monitoring technology[J]. Chinese Journal of Rock Mechanics and Engineering, 2016, 35(3):470-483.
[10] 彭祝,王元汉,李廷芥. Griffith理论与岩爆的判别准则[J]. 岩石力学与工程学报, 1996, 10(S1):491-495. PENG Zhu, WANG Yuanhan, LI Tingjie. Griffith theory and the criteria of rock burst[J]. Chinese Journal of Rock Mechanics and Engineering, 1996, 10(S1):491-495.
[11] 邱道宏, 陈剑平, 张秉鹤, 等.深埋长大公路隧道岩爆预测及防治研究[J].地下空间与工程学报, 2006, 2(6):950-955. QIU Daohong, CHEN Jianping, ZHANG Binghe, et al. Study on rockburst prediction and prevention in deep and over length highway tunnel[J]. Chinese Journal of Underground Space and Engineering, 2006, 2(6):950-955.
[12] 张永习. 可拓综合评判在某水工隧洞岩爆等级评价中的应用[J]. 山东大学学报(工学版), 2012, 42(2):58-63. ZHANG Yongxi. Application of extensible comprehensive evaluation for rock burst prediction in a hydro tunnle[J]. Journal of Shandong University(Engineering Science), 2012, 42(2):58-63.
[13] 景锋,边智华,杨火平,等.深埋长隧道地应力测量与岩爆预测分析[J].人民长江,2008,39(1):80-82,93. JING Feng, BIAN Zhihua, YANG Huoping, et al. Geo stress measurement and rockburst prediction for high buried tunnels[J]. Yangtze River, 2008, 39(1):80-82,93.
[14] 胡毅夫,张常亮. 钻孔卸压技术在渣滓溪锑矿岩爆防治中的应用[J]. 有色金属工程, 2016, 6(1):63-89. HU Yifu, ZHANG Changliang. Application of pressure relief technology by drilling holes to rock burst prevention in Zhazixi Antimony Mine[J]. Nonferrous Metals Engineering, 2016, 6(1):63-89.
[15] 李树彬. 三软煤层回采巷道支护中钻孔卸压技术[J]. 煤炭科学技术, 2012, 40(6):29-32. LI Shubin. Borehole drilling and pressure releasing technology applied to mining gateway support in three soft seam[J]. Coal Science and Technology, 2012, 40(6):29-32.
[16] FAJKLEWICZ Z. Rock-burst forecasting and genetic research in coal mines by microgravity method[J]. Geophysical Prospecting, 1983, 31:748-765.
[17] KIDYBINSKI A.bursting liability indices of coal[J]. Internatioanal Journal of Rock Mechanics and Mining Science & Geomechanics Abstracts, 1981, 18(4):295-304.
[18] 齐庆新,雷毅,李宏艳,等. 深孔断顶爆破防治冲击地压的理论与实践[J]. 岩石力学与工程学报, 2007, 26(增1):3522-3527. QI Qingxin, LEI Yi, LI Hongyan, et al. Theory and application of prevention of rock burst by break-tip blast in deep hole[J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(Supp 1):3522-3527.
[19] 刘美山,吴新霞,丁秀丽,等. 弱能量爆破技术在地下隧洞工程岩爆治理中的应用试验[J]. 岩石力学与工程学报, 2013, 32(增2):3675-3680. LIU Meishan, WU Xinxia, DING Xiuli, et al. Application experiment of weak energy blasting technology at underground tunnel rock burst governance[J]. Chinese Journal of Rock Mechanics and Engineering, 2013, 32(Supp 2):3675-3680.
[20] 谢和平,彭瑞东,鞠杨. 岩石变形破坏过程中的能量耗散分析[J].岩石力学与工程学报,2004,23(21):3565-3570. XIE Heping, PENG Ruidong, JU Yang. Energy dissipation of rock deformaltion and fracture[J]. Chinese Journal of Rock Mechanics and Engineering, 2004, 23(21):3565-3570.
[21] 崔兰,王树仁. 深部圆巷开挖围岩能量耗散特征数值模拟分析[J]. 山东大学学报(工学版), 2009, 39(4):102-106. CUI Lan, WANG Shuren. Numeriacl simulation of the energy dissipation charateristics of an excavated circular tunnel under high stress conditions[J]. Journal of Shandong University(Engineering Science), 2009, 39(4):102-106.
[1] NING Guangzhong, HU Quanguang, YAN Xiao, WANG Luyu. Analysis of pre-splitting blasting in rock burst area of N-J hydropower station [J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2017, 47(2): 41-46.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
Copyright 2018 © Editorial office of Journal of Shandong University (Engineering Science)
Supported by Beijing Magtech Co.Ltd