炮孔约束下双槽聚能管对乳化炸药殉爆距离影响的研究

Influence of Double Groove Energy Gathering Tubes on the Denotation Distance of Emulsion Explosives Under Constraint of Blast Hole

为研究在炮孔约束下双槽聚能管对乳化炸药殉爆距离的影响,采用外径57 mm、壁厚4 mm的无缝钢管模拟孔径49 mm的周边孔进行乳化炸药和"乳化炸药+双槽聚能管"的殉爆试验研究,测试乳化普通药包和聚能药包在无缝钢管中的最大稳定殉爆距离。结果表明,在无缝钢管约束下,长度17 cm的乳化普通药包和聚能药包的最大稳定殉爆距离为105 cm和130 cm;由于聚能管约束径向传播爆轰波,增大轴向上同轴点处冲击波能量,使得在双槽聚能管约束作用下乳化炸药殉爆距离显著增大,且外界约束条件越好,殉爆距离越大;可推理出长度17 cm的聚能药包在隧道周边孔中的最大稳定殉爆距离不小于130 cm。

In order to study the influence of the double groove energy gathering tubes on the sympathetic detonation distance of emulsion explosive under the constraint of blast holes, a seamless steel tube with an outer diameter of 57 mm and a wall thickness of 4 mm was used to simulate the peripheral holes with a 49 mm aperture in an experiment on the sympathetic detonation of emulsion explosive and "emulsion explosive + double groove energy gathering tube", for studying the maximum stable sympathetic detonation distance for the common emulsion charge and the energy gathering charge in the seamless steel tube. The results show that under the constraint of seamless steel tube, the maximum stable sympathetic detonation distance for common emulsion charge and gathering energy charge with a length of 17 cm is 105 cm and 130 cm respectively. Because the energy gathering tube constrains the radial propagation of the detonation wave and increases the energy of the shock wave at the coaxial point in axial direction, the sympathetic detonation distance of the emulsion explosive increases significantly under the constraint of the double groove energy gathering tube. Furthermore, the better the external constraint conditions are, the longer the sympathetic detonation distance is. It can be inferred that the maximum stable sympathetic detonation distance of the energy gathering charge with a length of 17 cm in the peripheral hole around the tunnel is no less than 130 cm.