Abstract:2-D single and multiple layered models were made of plexiglass(1000 × 200 × l0mm3)and aluminum (1000 × 25 × l0mm3),which were placed in air and water respectively, Both the kinematic and dynamic characteristics of converted waves in the layered medium models were analysed using both theoretical calculation and model experiment.A small powerful high-velocity shaped charge,Which is exploded at the optimum depth in a cased hole filled with water, can surely satisfies the above requirements,The experiments resulted in conclusive points:the cased shothole can be reused for tens of hundreds of times, the records obtained from different explosions have very similar frequency spectra and first break times, the dominant frequency of the frequency spectrum may be 40Hz, and the shaped charge used only weighs some dozens of grams.