岩石中浅孔爆破特性的数值模拟
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摘要
采用某工程现场岩石力学、爆破参数,建立柱状装药、微差爆破数值计算模型,研究岩石中浅孔爆破应力特征和速度变化规律,考虑介质的重力、分段爆破影响。研究结果表明:最大主应力在几何形状变化处最大;有效应力最大值出现在距离爆源最近处;速度计算结果与现场爆破振动速度监测结果相吻合。
Using the rock mechanics and blasting parameters in a certain field engineering,the numerical calculation model of cylindrical charge and segmented blasting was built,and the stress features and velocity laws in the shallow-hole blasting were researched.The factors of gravity for the medium and sub-blasting effect were considered.The results show that the effective stresses of geometry shape diversification are maximum,and the maximum principal stresses of the nearest station from the explosion source are maximum.The computation velocities are in good agreement with those obtained by monitoring vibration.
Using the rock mechanics and blasting parameters in a certain field engineering,the numerical calculation model of cylindrical charge and segmented blasting was built,and the stress features and velocity laws in the shallow-hole blasting were researched.The factors of gravity for the medium and sub-blasting effect were considered.The results show that the effective stresses of geometry shape diversification are maximum,and the maximum principal stresses of the nearest station from the explosion source are maximum.The computation velocities are in good agreement with those obtained by monitoring vibration.
引文
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[15]Bakhshandeh A H,Mozdianfard M R,Siamaki A.Predicting of blasting vibrations in Sarcheshmeh copper mine by neural network[J].Safety Science,2010,48:319-325.
[2]龚敏,黄毅华,王德胜,等.松软煤层深孔预裂爆破力学特性的数值分析[J].岩石力学与工程学报,2008,27(8):1674-1677.GONG Min,HUANG Yi-ua,WANG De-heng,et al.Numerical simulation on mechanical characteristics of deep-hole preprinting blasting in soft coal bed[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(8):1674-1677.
[3]王礼立.爆炸力学数值模拟中本构建模问题的讨论[J].爆炸与冲击,2003,23(2):106-108.WANG Li-li.On constitutive modeling in numerical simulation of explosion mechanics[J].Explosion and Shock Waves,2003,23(2):106-108.
[4]宇文惠鑫.炮孔双介质不耦合装药断裂控制爆破理论研究与数值模拟[D].太原:太原理工大学矿业工程学院,2006:47-65.YUWEN Hui-xin.Numerical simulation and theory study of blasthole fracture controlled blasting with two decoupling interaction charge[D].Taiyuan:Taiyuan University of Technology.College of Mining Technology,2006:47-65.
[5]夏祥.爆破荷载作用下岩体振动特征的数值模拟[J].岩土力学,2005,6(1):50-54.XIA Xiang.Udec modeling of vibration characteristics of jointed rock mass under explosion[J].Rock and Soil Mechanics,2005,26(1):50-54.
[6]罗伟,朱传云,祝启虎.隧洞光面爆破中炮孔堵塞长度的数值分析[J].岩土力学,2008,29(9):2487-2490.LUO Wei,ZHU Chuan-yun,ZHU Qi-hu.Numerical simulation of stemming length in tunnel smooth blasting[J].Rock and Soil Mechanics,2008,29(9):2487-2490.
[7]刘军,刘汉龙,张正珺.爆炸荷载下土石坝动力响应特征的数值模拟[J].防灾减灾工程学报,2010,30(1):10-13.LIU Jun,LIU Han-long,ZHANG Zheng-jun.Numerical simulation of dynamic response of an earth and rock-fill dam to a blast loading[J].Journal of Disaster Prevention and Mitigation Engineering,2010,30(1):10-13.
[8]边金,陶连金,郭军.浅埋地下结构和土层在动荷载作用下的反应分析[J].世界地震工程,2005,21(4):49-52.BIAN Jin,TAO Lian-jin,GUO Jun.Dynamic response of the underground structure and soil[J].World Earthquake Engineering,2005,21(4):49-52.
[9]尚晓江,苏建宇,王化锋.ANSYS/LS-DYNA动力分析方法与工程实例[M].北京:中国水利水电出版社,2008:10-20.SHANG Xiao-jiang,SU Jian-yu,WANG Fa-feng.ANSYS/LS-DYNA dynamic analysis methods and projects[M].Beijing:China Water Power Press,2008:10-20.
[10]王志亮,郑明新.基于TCK损伤本构的岩石爆破效应数值模拟[J].岩土力学,2008,29(1):230-233.WANG Zhi-liang,ZHENG Ming-xin.Numerical simulation of effect of rock blasting based on TCK damage constitutive model[J].Rock and Soil Mechanics,2008,29(1):230-233.
[11]夏昌敬,鞠杨,谢和平.爆炸波在岩体巷道中传播和能量耗散的数值分析[J].弹道学报,2005,17(4):1-4.XIA Chang-jing,JU Yang,XIE He-ping.Numerical analysis of propagation of explosion wave and energy dissipation in tunnel and surrounding rock mass[J].Journal of Ballistics,2005,17(4):1-4.
[12]曲志明,周心权,巩伟平.大爆破爆炸冲击波在破碎岩体间传播的数值模拟研究[J].振动与冲击,2007,26(12):60-64.QU Zhi-ming,ZHOU Xin-quan,GONG Wei-ping.Numerical simulation on shock wave propagation in crushed rocks during interns blasting[J].Journal of Vibration and Shock,2007,26(12):60-64.
[13]高富强.最大水平主应力对巷道围岩稳定性影响的数值分析[J].矿业研究与开发,2008,28(1):62-65.GAO Fu-qiang.Numerical analysis on the influence of maximum horizontal principal stress on surrounding rock stability of roadway[J].Mining Research and Development,2008,28(1):62-65.
[14]夏祥,李俊如,李海波,等.爆破荷载作用下岩体振动特征的数值模拟[J].岩土力学,2005,26(1):50-54.XIA Xiang,LI Jun-ru,LI Hai-bo,et al.Under modeling of vibration characteristics of jointed rock mass under explosion[J].Rock and Soil Mechanics,2005,26(1):50-54.
[15]Bakhshandeh A H,Mozdianfard M R,Siamaki A.Predicting of blasting vibrations in Sarcheshmeh copper mine by neural network[J].Safety Science,2010,48:319-325.
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