爆炸波在岩体巷道中传播和能量耗散的数值分析  

NUMERICAL ANALYSIS OF PROPAGATION OF EXPLOSION WAVE AND ENERGY DISSIPATION IN TUNNEL AND SURROUDING ROCKMASS

作　　者：夏昌敬[1] 鞠杨[1] 谢和平[1] 

机构地区：[1]中国矿业大学北京市岩石混凝土破坏力学重点实验室中国矿业大学(北京)力学与建筑工程学院,北京100083

出　　处：《弹道学报》2005年第4期1-5,共5页Journal of Ballistics

基　　金：国家973资助项目(2002CB412705);国家自然科学基金创新群体资助项目(50221402);国家自然科学基金资助项目(50174055)

摘　　要：从工程实际出发,利用ANSYS/LS-DYNA程序数值分析了爆炸发生时岩层与巷道混凝土板中应力波传播与能量耗散过程,给出了上层岩石的损伤演化规律,分析了不同爆源位置对巷道混凝土板的破坏及其总能量的影响.数值计算表明,在爆炸近区,应力波衰减较快;封闭爆炸情况下,岩石破碎区范围为1.1～3.6倍药包半径,损伤区范围为3.6～10.0倍药包半径;随着爆源到混凝土板距离的减小,混凝土板吸收的能量逐渐减小.该计算结果对工程爆破具有一定的参考价值.Based on the application of explosion wave and energy dissipation practical engineering, propagation of in rock and tunnel were simulated using ANSYS/LS-DYNA software. Damage evolution of upper rock was provided. Influences of the position of explosive hole on damage and obtained energy of concrete slab of the tunnel were analyzed. Computational analysis shows that stress wave attenuates quickly in the region close to the explosive. The broken range of rock is 1.1 to 3.6 times as much as the radius of explosive, and the damage range is 3.6 to 10.0 times as much as radius of explosive. The absorption energy of concrete slab reduces with the reduction of distance between the explosive and the concrete plate. Numerical results provide a basic reference for blasting.

关 键 词：爆炸波 数值模拟 岩石 混凝土板 损伤演化 能量耗散 

分 类 号：O381[理学—流体力学] TU458.3[理学—力学]