孙波;石少卿;汪敏;
SUN Bo,SHI Shao-qing,WANG Min(Dept.of Architectural Engineering,School of Logistics Engineering,Chongqing 400041,China)

• 1:后勤工程学院军事建筑工程系

摘要(Abstract)：

运用有限元软件LS-DYNA模拟弹体在岩石边坡内爆炸的过程,对不同岩石性质、不同弹体装药量和不同侵彻深度下爆炸落石速度进行了计算分析。计算结果表明:不同地质岩质的爆炸落石抛掷速度不同,岩石密度越大,则落石抛掷速度越小;随着弹体装药量增加,处于爆破中区的落石抛掷速度增加不明显,爆破近区和爆破远区的落石速度增加比较快;随着弹体侵彻深度增加,爆炸落石的抛掷速度逐渐减小。同时,由于破坏区各点在能量的吸收和转化上并不一致,在破坏区内,爆炸落石的抛掷速度并不与到爆心的距离成正比。
ANSYS LS-DYNA was applied to simulate the explosion process of rock slope and the tossed velocity of rockfalls under the impact of different rock properties,explosive loads and penetration depth was calculated and analyzed.The results showed that different rock properties would form different tossed velocity of rockfalls,the larger the rock density was,the slower the tossed velocity of rockfalls was.With the increase of explosive load,the tossed velocity of rockfalls in the middle explosion area was not increased obviously,while in near and distant explosion areas,the tossed velocity of rockfalls was increased rather quickly.And with the increase of penetration depth,the tossed velocity of rockfalls was reduced gradually.Meanwhile,because the absorption and transformation of energy was different in damaged areas,the tossed velocity of rockfalls was not in proportion to the distance from the positon where the rockfall formed to the explosion center.

关键词(KeyWords)： 数值分析;爆炸落石;抛掷速度;岩石性质;弹体装药量;侵彻深度
Numerical analysis;Explosion rockfall;Tossed velocity;Rock property;Explosive load;Penetration depth

Abstract:

Keywords:

基金项目(Foundation): 总后基建营房部资助项目

作者(Authors): 孙波;石少卿;汪敏;
SUN Bo,SHI Shao-qing,WANG Min(Dept.of Architectural Engineering,School of Logistics Engineering,Chongqing 400041,China)

参考文献(References)：

• [1]张路青,杨志法,许兵.滚石与滚石灾害[J].工程地质学报,2004,12(3):225-231.
• [2]吕庆,孙红月,翟三扣,等.边坡滚石运动的计算模型[J].自然灾害学报,2003,12(2):79-84.
• [3]赵旭,刘汉东.水电站高边坡滚石防护计算研究[J].岩石力学与工程学报,2005,24(20):3742-3748.
• [4]吴顺川,高永涛,杨占峰.基于正交试验的露天矿高陡边坡落石随机预测[J].岩石力学与工程学报,2006,25(增1):2826-2832.
• [5]Stevens WD.Rockfall:a Tool for Probabilistic Analy-sis,Design of Remedial Measures and Prediction ofRockfalls[D].Canada:University of Toronto,1998.
• [6]黄华,郑长青,罗志高,等.条形药包爆炸作用的计算与分析[J].爆破,1999,16(2):7-11.
• [7]梁润.抛掷爆破的岩石抛掷速度[J].武汉水利电力学院学报,1980(3):39-46.
• [8]谢先启,韩传伟,严涛.闹市区铁路桥拆除爆破中的飞石及其防护[J].爆破,2000,17(2):56-59.
• [9]文德生,章克凌,范新.岩石强度对爆炸破坏影响的数值模拟[J].爆破,2008,25(4):11-19.
• [10]王利.岩石弹塑性损伤模型及其应用研究[D].北京:北京科技大学,2006.
• [11]李本平,卢文波.制导炸弹水平侵彻爆炸作用下混凝土重力坝毁伤效应数值仿真[J].爆破,2007,24(1):1-5.
• [12]韦灼彬.钢筋混凝土桩基梁板码头爆炸毁伤及抢修技术研究[D].天津:天津大学,2005.
• [13]颜事龙,陈叶青.岩石集中装药爆炸能量分布的计算[J].爆破器材,1993,(6):1-5.