CAJ | 학술논문

结合连续介质力学和动力非线性有限元理论知识，通过ANSYS/LS-DYNA建立20 m水深和无水两种情况下的钻孔爆破模型，采用多物质ALE算法，模拟得出了从孔底起爆时爆炸冲击波引起的应力响应，并根据岩石破碎机理判断出粉碎区、裂隙区和弹性振动区，在5~8倍的药柱半径范围内，由冲击波压碎岩石形成粉碎区，临界径向压应力为207 MPa左右，在10~14倍的药柱半径范围内，岩石被割裂形成裂隙区，且切向拉应力起主导作用，其临界值为16.1 MPa左右，对比分析两种模型的计算结果可知，水介质的存在会减缓冲击波与爆轰气体的衰减速率。
결합련속개질역학화동력비선성유한원이론지식，통과ANSYS/LS-DYNA건립20 m수심화무수량충정황하적찬공폭파모형，채용다물질ALE산법，모의득출료종공저기폭시폭작충격파인기적응력향응，병근거암석파쇄궤리판단출분쇄구、렬극구화탄성진동구，재5~8배적약주반경범위내，유충격파압쇄암석형성분쇄구，림계경향압응력위207 MPa좌우，재10~14배적약주반경범위내，암석피할렬형성렬극구，차절향랍응력기주도작용，기림계치위16.1 MPa좌우，대비분석량충모형적계산결과가지，수개질적존재회감완충격파여폭굉기체적쇠감속솔。
Combining with the principles of continuum mechanics with dynamical nonlinear finite element theo-ry,the ANSYS/LS-DYNA was used to build the drilling blast model with 20 m deep water and without water,by u-sing the method of multi-material Arbitrary Lagrange Eulerian finite. The stress response caused by explosive shock wave from the bottom initiation was simulated,which determined the crushing zone,fissure zone and elastic vibration zone by the rock-cracking mechanism. Furthermore,within 5 to 8 times of the radius of charge,the rock was crushed by shock wave and the critical radial compressive stress was about 207 MPa;within 10 to 14 times of the radius of charge,the rock was torn and the fissure zone came into being,where the tangential tensile stress played a leading role and critical value was about 16. 1 MPa. Results showed that the water decreased the decay rate of stress wave and detonation wave.