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用Ｘ光摄影技术研究了导爆索在泥面爆炸时爆坑的发展过程，得到的各瞬时爆坑轮廓线可用椭圆方程描述。瞬时最大爆坑深度约为７０～８０倍药芯半径，瞬时最大爆坑宽度约为２００倍药芯半径。爆坑深度随时间成对数关系增长，未见临空面对其有明显影响。临空面对爆坑的影响出现在爆坑宽度为６０～８０倍药芯半径之后，爆坑有回缩现象。
X-ray photography was used to study the development process of detonating pits when the detonating cord exploded on the mud surface. The contour of each instantaneous detonating pit can be described by the elliptic equation. The instantaneous maximum burst depth is about 70 ~ 80 times the core radius, instantaneous maximum burst width is about 200 times the core radius. The depth of the crater grows in a logarithmic relationship with time, and there is no obvious impact on the depth of the crater without any impact on it. The impact of facing the impact of temporary pit appears in the burst pit width of 60 ~ 80 times the core radius, the crater has a retraction phenomenon.