条形药包泥面爆炸爆坑发展过程的X光摄影研究

STUDY ON X-RAY PHOTOGRAPH TECHNOLOGY OFEXPLOSIVE CAVE OF A LENGTH CHARGE BLASTINGON SURFACE OF SLUDGE

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。

The process of development of explosive cave which was formed by the blasting of a detonate cord on the surface of the sludge is studied using Xray photograph technologyAs a result of the experiment,the shape of the explosive cave can be expressed by an elliptical equationThe maximal depth and wide of the explosive cave is about 70～80 times and 200 times of the radius of the charge core respectivelyThe relationship between the depth of the explosive cave and time is logarithmicThe free surfac eeffect on the width of the explosive cave appear after the width extended to 60～80 times of the radius of the charge coreThe free surfac eeffect on the depth of the explosive cave is not obviousThe experiment confirmed that there is a contractive process before the development of explosive cave stopped