The propagation characteristics of stress waves in soil directly influence the safety assessment of underground structures, engineering protection design, and disaster prediction. When explosives are detonated at different burial depths, the shallow underground medium near the explosion center will be simultaneously subjected to direct ground shock and induced ground shock. Existing research has focused either on direct ground shock or induced ground shock separately, without considering the combined effects of the two. Therefore, this paper focuses on exploring the influence of the key parameter of explosion burial depth on the propagation law of stress waves in soil. It also analyzes the effects of factors such as explosive type. Building on the pressure–volumetric strain relationship of Luoyang loess from prior research, the pressure–density correlation in the SAND model’s shock compaction equation was refined. Contact explosion and semiburied explosion tests on loess validated the numerical model using experimental data. Twenty‐two simulation cases were systematically conducted to examine how scaled charge burial depth (SCBD) and explosive types influence ground shock zoning. Key results reveal the following: As charge depth increases, induced ground shock peaks attenuate, while direct ground shock peaks amplify, merging dual peaks in pressure and vertical stress time travel curves into a single peak. This transition defines three stress wave subzones: surface subzone, near‐surface subzone, and central subzone. At SCBD values of −0.05–0.075 m/kg 1/3 , the central subzone expands rapidly with increasing SCBD, accompanied by surface subzone contraction and gradual near‐surface subzone growth. Ground shock zoning stabilizes at SCBD values of 0.1–0.4 m/kg 1/3 . While explosive type governs kinetic energy partitioning between air and soil, the angular distribution of ground shock subzones shows a linear relationship with I air / I soil (air overpressure impulse vs. direct ground shock stress impulse) within specific parametric ranges. The research findings provide a theoretical basis and technical support for relevant engineering practices.
Liu et al. (Thu,) studied this question.