ABSTRACT
Explosion yield estimation is essential for explosion accident monitoring, weapon effectiveness testing, and verification monitoring. In this paper, the variation of the amplitude and the arrival time of the primary wave with distance are analyzed. Subsequently, based on data of the air-coupled seismic wave and the primary wave, the joint inversion of the explosion source parameters is carried out. Ultimately, the following conclusions are drawn: first, as the primary wave is affected by the underground reflecting interface, after a long-range propagation, the reflected wave will catch up with the direct wave, changing the relationships between the first peak displacement and the arrival time with distance; second, compared to the true values, the inverted results of explosion yield are larger, but the inverted values of 100-kg-magnitude experiments have small relative errors with high estimation accuracy, while the inverted value of the 8-kg-magnitude experiment has a large relative error; third, the overall error of inverted height-of-burst (HOB) is larger, but the symbol of inversion results is consistent with that of true HOB, that is, the inversion results can be used to judge whether the explosion is over or under the ground.
