为探究不耦合装药系数在预应力条件下对爆轰聚能药包破岩效果的影响，基于ANSYS/LS-DYNA有限元软件，开展了预应力、不耦合装药系数以及起爆方式耦合作用下爆破效果的数值研究，并通过炮孔内壁峰值压力的监测分析了药包的破岩能力。计算结果表明：预应力对爆炸产生的破碎区影响较小，对裂隙区的主裂纹长度有明显的抑制作用。预应力（σ_x =σ_z = 14 MPa，σ_y = 7 MPa）条件下，随着不耦合装药系数的增加孔壁峰值压力呈现逐渐降低趋势，爆轰聚能药包聚能侧爆压提升能力呈现先降低后升高的趋势，耦合装药时爆轰聚能药包聚能侧爆压提升26.3%，不耦合装药系数K = 1.6时聚能侧爆压提升22.1%；爆轰聚能药包与中心点起爆药包相比，孔壁聚能侧峰值压力提升11.9%，损伤面积提升15.1%，有明显的定向作用。研究结果对爆轰聚能爆破技术在岩体的应用具有一定的指导意义。

In order to explore the influence of uncoupled charge coefficient on the rock breaking effect of a shaped charge under the condition of pre-stress, based on the finite element software ANSYS/LS-DYNA, the numerical study on blasting effect under the coupling action of pre-stress, uncoupled charge coefficient and initiation mode was carried out, the rock-breaking ability of the charge was analyzed by monitoring the peak pressure on the inner wall of the borehole. The calculation results show that: the pre-stress has little effect on the crush zone caused by explosion, but has an obvious inhibitory effect on the length of the main crack in the fracture zone. Under the condition of σ_x = σ_z = 14 MPa, σ_y = 7 MPa, the peak pressure on the inner wall of the borehole decreases gradually with the increase of the uncoupling charge coefficient, the increasing of detonation pressure on the energy cumulative side of the shaped charge decreases at first and then increases. The detonation pressure on the concentrated side of the shaped charge increases by 26.3% in the coupling charge, the detonation pressure on the energy cumulative side increases by 22.1% when the uncoupling charge coefficient K = 1.6. Compared with the central point initiation charge, the peak pressure of the shaped charge on the inner wall of the borehole increases by 11.9%, and the damage area increases by 15.1%. It has obvious directional effect. The research results have a certain guiding significance for the application of detonation concentrated blasting technology in deep high ground stress.