黑龙江省五大连池新期火山喷发的火山弹动力学初探

The Preliminary Research on Dynamics of Volcanic Bombs from Modern Eruption in Wudalianchi Area,Heilongjiang Province

本文系统地总结了黑龙江省五大连池新期火山老黑山和火烧山的火山弹形态和内部结构;对比和讨论了近球状、纺锤状、椭球状和圆饼状火山弹的体积估算和准确的表示方法;初步研究了火山弹的形成、空中飞行和落地变形的动力学过程。根据老黑山火山弹的分布情况,计算出了老黑山新期喷发时火山弹达到的高度范围。

The form and internal structure of bombs recently erupted from the Laoheishan and Huoshaoshan volcanoes in Wudalianchi, China, is systematically summarized and studied. By estimating the volumes of spheroidal, fusiform, elliptic, almond-shaped and cow-dung bombs in different models, a more accurate expression of bomb volume is proposed. Furthermore, the dynamics of formation, ballistic trajectory and colliding deformation of bombs is tentatively studied and discussed. According to the scale of the Laoheishan volcano and the distribution of bombs around it, the range of height,at which bombs ascend, has been calculated.