防护下的导爆索在高温火区爆破中的应用  

Application of Protected Detonating Cord in Fire Area Blasting

作　　者：林谋金[1,2] 郑炳旭 李战军 周科平[2] 束学来 

机构地区：[1]宏大矿业有限公司,广州510623 [2]中南大学资源与安全工程学院,长沙410083

出　　处：《爆破》2016年第4期123-126,共4页Blasting

基　　金：基金项目:广东省产学研合作院士工作站(2013B090400026)

摘　　要：为了使普通导爆索能应用在高温炮孔中,采用陶瓷纤维套管与胶体水对导爆索进行防护,通过热电偶测温技术测量陶瓷纤维套管中的温度变化以及高温炮孔填土前后的温度变化。结果表明:填土后的炮孔中心温度在较长时间内才回升到先前的温度,有利于导爆索的保护;耐温隔热套管内下部温升速率比上部温升速率快,但最终都稳定在水沸点温度,防护下的导爆索在其底部温度为320℃炮孔中放置40 min后能正常起爆。In order to use the detonating cord in high temperature blast hole safely, the detonating cord is posed in the ceramic fiber sleeve filled jelling water and the thermocouple is applied to measure the temperature in the ceramic fiber sleeve and blasthole before and after explosive charging. The results show that the temperature in the middle of blasthole returns to the previous temperature for a long time after filled soil, which is advantageous to protect the detonating cord. The temperature rise rate in the bottom of the thermal insulation sleeve is faster than that in the top, both of which remain at boiling point of water in the end. The protected detonating cord in the blasthole （ 320℃ ） for 40 minutes can be detonated normally.

关 键 词：露天开采 火区爆破 导爆索 耐火隔热套管 胶体水 

分 类 号：TD235[矿业工程—矿井建设]