为了深入研究禁爆条件下硬岩隧洞“取芯+劈裂”破岩力学机理与施工技术，依托深圳铁岗-石岩水库水质保障工程，基于空孔效应理论，对不同空孔角度和空孔数量的钻孔方式进行数值模拟分析，研究其裂纹扩展及劈裂压力的影响规律，提出了空孔角度为40°和空孔数量为2个的静力爆破空孔参数，并将其应用于现场试验中。结果表明：当劈裂孔与空孔中心之间的水平夹角减小时，岩石裂纹的定向扩展将得到促进，理想的夹角应低于45°。空孔数量对于岩石的破岩过程起到了推动作用，随着空孔数量的逐步增加，岩石承受的最大劈裂压力持续降低，劈裂压力下降率呈现逐渐增高的趋势。通过试验可以证明“取芯+劈裂”破岩的可行性，空孔的存在有助于在空孔与劈裂孔连线方向形成连贯的主裂纹，从而提升了硬岩的破碎效率。试验结果与理论分析及数值模拟结果相吻合，并达到了预期的破岩效果，为禁爆条件下硬岩破岩提供借鉴意义。

In order to deeply study the mechanical mechanism and construction technology of "coring + splitting" rock breaking in hard rock tunnel under the condition of explosion-proof, drawing on the Water Quality Assurance Project of Tiegang-Shiyan Reservoir in Shenzhen, and grounded in the theory of empty hole effect, the numerical simulation analysis of drilling methods with different empty hole angles and empty hole numbers was carried out to study the influence of crack propagation and splitting pressure. The static blasting empty hole parameters with empty hole angle of 40° and empty hole number of 2 were proposed and applied to the field test. The results show that the smaller the horizontal angle between the splitting hole and the center of the empty hole is, the more helpful it is to the directional propagation of the rock crack, and the ideal angle should be less than 45°. The number of hollow holes plays a role in promoting the rock breaking process of rock. With the gradual increase of the number of hollow holes, the maximum splitting pressure of rock decreases continuously, and the decrease rate of splitting pressure increases gradually. Through experiments, the feasibility of "coring + splitting" rock breaking can be proved. The existence of empty holes helps to form a coherent main crack in the direction of the connection between the empty hole and the splitting hole, thus improving the crushing efficiency of hard rock. The experimental results are basically consistent with the theoretical analysis and numerical simulation results, and the expected rock breaking effect is achieved, which provides a reference for the rock breaking of hard rock under the condition of no blasting.