一种应用于高温火区爆破中的不可逆起爆网路的耐温与传爆性能

针对发生在高温火区炮孔装药的误爆和早爆安全事故,采用传爆试验法、燃烧法、系统可靠性法则研究了一种应用于高温火区爆破的新型不可逆起爆网路,测试了金属爆炸索在高温环境中的耐温特性、不可逆起爆元件的传爆可靠性以及阻爆效果、评价并计算了整个爆破网路的安全性与可靠度。结果表明:炮孔内使用金属爆炸索比塑料导爆索耐高温安全时间长,降低了因高温造成炮孔误爆的概率;孔外部分包含的不可逆起爆元件具有类似于电路中二极管的作用,在爆破网路中起着单向安全控制作用,避免发生因单个炮孔的意外引发整个爆破网路误爆,保证了主网路的安全。当炮孔数达到64个时,不可逆起爆网路可靠度依然可达到99.99%,明显优于传统爆破网路。

Heat Resistance and Explosion Transfer Performance in the Irreversible Detonating Network Applied in High Temperature Mine Blasting

In order to solve the problem of the sudden spontaneous firing and premature explosion of high temperature in the blast hole charge, a new type of irreversible detonating network applied in the high temperature coal mine was studied by adapting explosion test method, combustion of thermal analysis and system reliability rule. The experiment tests on the heat resistance property of metal detonation cord in high temperature and detonation propagation reliability and resistance effect of the irreversible initiating component were carried out, and the blasting network security and reliability were evaluated and calculated as well. Results show that the metal detonation cord in the hole can effectively improve the safe time of the high temperature resistant performance, and reduce the probability of sudden spontaneous firing. The irreversible detonating structure, similar to the role of the diode in the circuit, plays a safety control function in the blasting network ,and avoids the sudden spontaneous firing of the whole detonating network caused by a certain blasthole, ensuring the safety of the main network. The irreversible detonating network reliability reaches 99.99% with the hole number of 64, better than the traditional blasting network.