Research on Influencing Factors of Detonation Velocity Consistency of Small Diameter Flexible Detonating Cord
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摘要:为了提高小直径柔性导爆索传爆速度的稳定性，采用探针法测量技术研究了银管装药压力、导爆索外径、拉制工艺、弯曲度等对小直径导爆索爆速一致性的影响，并对试验结果进行了分析。结果表明：银管的装药压力过大或过小都会对导爆索的爆速稳定性产生影响，较为合适的装药压力为80MPa；导爆索外径越大爆速一致性越好，但是随着外径的增大，外径对爆速一致性的影响会减弱；导爆索的拉制次数越多，爆速一致性越好，但超过一定次数后影响较小；导爆索的弯曲度在一定范围内对爆速的一致性影响不大，但弯曲直径过小且弯曲度过大会导致导爆索断爆，从而影响传爆可靠性。
Abstract:In order to improve the stability of detonation velocity of small-diameter flexible detonating cord, the effects of silver tube charge pressure, detonating cord outer diameter, drawing process and curvature on the consistency of detonation velocity of small-diameter detonating cord were studied by using probe measurement technology, and the test results were analyzed. The results show that if the charge pressure is too high or too low, the detonation velocity stability of the silver detonating cord would be affected, the more appropriate charge pressure is 80MPa; The larger the outer diameter of the detonating cord, the better the consistency of detonation velocity, however, with the increase of the outer diameter, the influence of the outer diameter on the consistency of detonation velocity will be weaken; The more pulling times for the detonating cord, the better the consistency of detonation velocity, but the influence is small after exceeding a certain number of times; The curvature of the detonating cord has little effect on the consistency of detonation velocity within a certain range, but the small curvature diameter and excessive bending will lead to the breakage of the detonating cord, which will affect the reliability of detonation transmission.
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