液态CO_2多致裂管爆破同步性研究  

Study on Blasting Synchronization of Liquid CO_2 Cardox Blasters

作　　者：范永波[1] 乔继延[1] 李世海[1] 冯春[1] FAN Yongbo;QIAO Jiyan;LI Shihai;FENG Chun(Key Laboratory tor Mechanics in Fluid Solid Coupling Systems, Institute of Mechanics, Chinese Academy of Sciences （Beijing, 100190)

机构地区：[1]中国科学院力学研究所流固耦合系统力学重点实验室,北京100190

出　　处：《爆破器材》2018年第3期60-64,共5页Explosive Materials

摘　　要：现场进行爆破作业时,为提升爆破效果,往往布设多个钻孔,同时起爆。实际上,多致裂管起爆的时间差较大,同步性较难控制,直接影响爆破效果。本文中,提出一种提升液态CO_2多致裂管爆破同步性的方法,保持现有致裂管主体结构不变,将导爆管直接粘贴在防爆片上。通过开展致裂管爆破对比试验,对爆破全过程进行压力数据采集。经试验数据对比分析发现,原有致裂管内导爆管与防爆片分置在致裂管两端,导爆管点燃后,需通过致裂管内的液态CO_2传递压力,击破防爆片共需30~60 ms,优化后击破时间小于20 ms,可明显降低爆破时间的不确定性,这种条件下多管串、并联爆破更容易实现同步性。另外,通过开展对比试验研究,在其他条件不变的前提下,增大致裂管释放口面积20%,可有效增大总冲量值10%,提升爆破效果。Normally a group of cardox blasters will be detonated simultaneously during onsite operation to enhance the blasting effect. In tact, the blasting synchronization can not be well controlled which may attect the blasting effect. In this paper, a new method was proposed to improve the blasting synchronization by the direct paste of detonator on the rup- ture disk. Pressure values for the whole process of blasting were collected by comparison test. Testing data analysis disclo- ses that tor cardox blaster with detonator and rupture disk separated at each of its ends, it takes about 30~60 ms to accom- plish the ignition of detonator and pressure passing through the liquid CO： to blow up the rupture disk. Whereas tor the new design, it needs less than 20 ms. Superior blasting synchronization could be obtained after optimization. In addition, in- creasing the outlet area by 20% while other conditions remain unchanged can effectively bring in 10% improvement in total impulse value which will enhance the blasting effect.

关 键 词：致裂管 液态CO2 爆破同步性 

分 类 号：TD235.3[矿业工程—矿井建设]