Gold Science and Technology
img

Wechat

Adv. Search
Online Submission Peer Review Office Work

Gold Science and Technology ›› 2019, Vol. 27 ›› Issue (2): 241-248.doi: 10.11872/j.issn.1005-2518.2019.02.241

• Mining Technology and Mine Management • Previous Articles    

Analysis of Blasting Vibration Effects Under Different Ground Stress

Xiaohan LI(),Kewei LIU(),Jiacai YANG,Xudong LI   

  1. School of Resources and Safety Engineering，Central South University，Changsha 410083，Hunan，China
  • Received:2018-02-04 Revised:2018-04-04 Online:2019-04-30 Published:2019-04-30
  • Contact: Kewei LIU E-mail:lixiaohan@csu.edu.cn;kewei_liu@126.com

RichHTML

6

PDF (PC)

608

Abstract:

As the depth of mining, tunnel excavation, etc. continues to increase, high ground stresses appear in the interior of the rock mass. High ground stress will have a great impact on the blasting effect of rock mass. In order to study the blasting vibration effects on rock mass under different ground stresses, the finite element software ANSYS/LS-DYNA is applied to simulate the propagation of stress wave in rock mass under high ground stress.The influence of blasting on the surrounding rock mass under different ground stresses is analyzed, and the effects of different ground stresses on the blasting effect is finally obtained.A constitutive model of rock mass is selected and calibrated.Then applying implicit-explicit method, the dynamic explicit software ANSYS/LS-DYNA is used to model the blasting process of rock mass under different lateral pressure coefficients. Numerical models are built under condition that lateral pressure coefficients are 0.1, 0.5, 1.0, 2.0 and 4.0,respectively. Numerical simulation results indicate that high ground stress inhibits the blasting effects of rock mass and resists the damage extension around the blast hole. The lateral pressure coefficient has less influence on the fracture zone of rock mass, but has a greater influence on the crack zone of rock mass. And cracks will extend to the direction of higher ground stress more easily. Before the peak vibration velocity reaches its peak point, the rising time of peak particle velocity （PPV） is not influenced by lateral pressure coefficients. PPV in horizontal direction is greater than that of vertical direction when the lateral pressure coefficient is less than 1.0, while PPV in vertical direction is greater than that of horizontal direction when the lateral pressure coefficient is more than 1.0. This research can not only be used to evaluate the stability of deep rock mass structure under blasting load, but also can correctly guide blasting operation in engineering practice. More importantly, applying numerical simulation to analyze rock mass damage under blasting load can provide a reference experience for the in-depth study of the damage mechanism of rock mass under high strain rate dynamic loads.

Key words: blasting vibration, ANSYS/LS-DYNA, ground stress, lateral pressure coefficient, blasting crack, peak particle velocity

CLC Number: 

  • TD853

Table 1

Physical and mechanic parameters of rock"

岩石参数数值岩石参数数值
抗压强度/MPa21弹性模量/GPa13.1
抗拉强度/MPa1.8泊松比0.25
密度/（kg·m-3）2 009

Table 2

Parameters of rock emulsion explosive"

炸药参数数值炸药参数数值
密度/（kg·m-3）1 100R14.2
爆速/（m·s-1）3 600R20.9
A/GPa214.4ω0.15
B/GPa0.182E0/GPa4.192

Fig.1

Comparison of numerical and test results"

Fig.2

Schematic of geometric model"

Fig.3

Distribution of rock failure zone under different lateral pressure coefficients"

Fig.4

Layout of picked nodes"

Fig.5

Time-history curves of particle vibration velocity at different locations"

Fig.6

Comparison of peak particle velocity (PPV) in horizontal and vertical directions under different lateral pressure coefficients"

1 YuL，SuH，JingH，et al.Experimental study of the mechanical behavior of sandstone affected by blasting[J].International Journal of Rock Mechanics and Mining Sciences，2017，93：234-241.
2 RoyM P，SinghP K，SarimM，et al.Blast design and vibration control at an underground metal mine for the safety of surface structures[J].International Journal of Rock Mechanics and Mining Sciences，2016，83：107-115.
3 AhsanN，SchedingS，MonteiroS T，et al.Adaptive sampling applied to blast-hole drilling in surface mining[J].International Journal of Rock Mechanics and Mining Sciences，2015，75：244-255.
4 LeeJ S，AhnS K，SagongM.Attenuation of blast vibration in tunneling using a pre-cut discontinuity[J].Tunnelling and Underground Space Technology，2016，52：30-37.
5 YangP，XiangJ，ChenM，et al.The immersed-body gas-solid interaction model for blast analysis in fractured solid media[J].International Journal of Rock Mechanics and Mining Sciences，2017，91：119-132.
6 YiC P，JohanssonD，GrebergJ.Effects of in-situ stresses on the fracturing of rock by blasting[J].Computers and Geotechnics，2018， 104：321-330.
7 胡建华，杨春，周炳任，等.巷道压顶光面爆破裂隙扩展模拟及参数优化[J].黄金科学技术，2017，25（2）：45-53.
HuJianhua，YangChun，ZhouBingren，et al.Simulation of fracture propagation and optimization of parameters for smooth blasting of coping in roadway[J].Gold Science and Technology，2017，25（2）：45-53.
8 过江，崔文强，陈辉.不同耦合介质光面爆破裂纹发展数值分析[J].黄金科学技术，2016，24（1）：68-75.
GuoJiang，CuiWenqiang，ChenHui.Numerical analysis of the smooth blasting crack development under different coupling medium[J].Gold Science and Technology，2016，24（1）：68-75.
9 Van GoolB V.Effects of Blasting on the Stability of Paste Fill Stopes at Cannington Mine[D].Townsville：James Cook University，2007.
10 刘优平，龚敏，赵江倩，等.近充填体崩矿过程爆破振动控制研究[J].矿冶工程，2011，31（5）：13-17.
LiuYouping，GongMin，ZhaoJiangqian，et al.Study on blasting vibration control during mining near the fill-mass[J].Mining and Metallurgical Engineering，2011，31（5）：13-17.
11 唐明渊，周建敏，余红兵，等.爆破振动对不同埋深采空区稳定性影响研究[J].爆破，2017，34（3）：140-144.
TangMingyuan，ZhouJianmin，YuHongbing，et al.Influenced of blasting vibration on stability analysis of different depths of mined-out areas[J].Blasting，2017，34（3）：140-144.
12 胡建华，雷涛，周科平，等.充填采矿环境下爆破振动效应预测与控制[J].爆破，2009，26（4）：81-84.
HuJianhua，LeiTao，ZhouKeping，et al.Forecast and control of blasting vibration effects under fill mining condition[J].Blasting，2009，26（4）：81-84.
13 LuW B，ChenM，GengX，et al.A study of excavation sequence and contour blasting method for underground powerhouses of hydropower stations[J].Tunnelling and Underground Space Technology，2012，29：31-39.
14 MaG W，AnX M.Numerical simulation of blasting-induced rock fractures[J].International Journal of Rock Mechanics and Mining Sciences，2008，45（6）：966-975.
15 YilmazO，UnluT.Three dimensional numerical rock damage analysis under blasting load[J].Tunnelling and Underground Space Technology，2013，38（9）：266-278.
16 LSTC.LS-DYNA User Manual Version Non Dynamic of Structure in Three Dimension[M].California：Livermore Software Technology Corporation（LSTC），2003.
17 JohnH O.LS-DYNA theoretical manual-version 970[R].Califorila：Livermore Software Technology Corporation，2005.
18 杨军，金乾坤，黄风雷，等.岩石爆破理论模型及数值计算[M].北京：科学出版社，1999.
YangJun，JinQiankun，HuangFenglei，et al.Theoretical Model and Numerical Simulation of Rock Blasting[M].Beijing：Science Press，1999.
19 石少卿，康建功，汪敏，等.ANSYS/LS-DYNA在爆炸与冲击领域内的工程应用[M].北京：中国建筑工业出版社，2011：20-31.
ShiShaoqing，KangJiangong，WangMin，et al.Application of ANSYS/LS-DYNA in Blasting and Impacting[M].Beijing:China Architecture and Building Press，2011：20-31.
20 HallquistJ O.Theoretical manual for dyna3D university of California[R].Califorila：Lawrence Livermore National Laboratory，1982.
21 OnederraI A，FurtneyJ K，SellersE，et al.Modelling blast induced damage from a fully coupled explosive charge[J].International Journal of Rock Mechanics and Mining Sciences，2013，58：73-84.
22 ZhaoJ J，ZhangY，RanjithP G.Numerical simulation of blasting-induced fracture expansion in coal masses[J].International Journal of Rock Mechanics and Mining Sciences，2017，100：28-39.
23 唐海，李海波，周青春，等.预裂爆破震动效应试验研究[J].岩石力学与工程学报，2010，29（11）：2277-2284.
TangHai，LiHaibo，ZhouQingchun，et al.Experimental study of vibration effect of presplit blasting[J].Chinese Journal of Rock Mechanics and Engineering，2010，29（11）：2277-2284.
[1] Chong CHEN,Xibing LI,Fan FENG. Numerical Study on Damage Zones of the Induced Roadway Surrounding Rock [J]. Gold Science and Technology, 2018, 26(6): 771-779.
[2] GUO Jiang，CUI Wenqiang，CHEN Hui. Numerical Analysis of the Smooth Blasting Crack Development under Different Coupling Medium [J]. Gold Science and Technology, 2016, 24(1): 68-75.
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