目前延长药包在硐室爆破中正以其诸多优点而倍受现场欢迎,然而延长药包的应用却受到许多地质条件或人为因素的制约而不易实现,而且延长药包的计算公式繁多,究竟哪些公式比较合理也是亟待解决的问题。作者根据自己及其他爆破工作者的经验,浅析了延长药包的适用条件及应用方法,给出了当前比较实用合理的延长药包计算公式。 At present, the extension of the kits in the chamber blasting is greatly welcomed by the scene with many advantages. However, the application of the kits to extend the kits is not easily realized due to the constraints of many geological conditions or man-made factors. Moreover, the formula for extending the kits is numerous, The more reasonable formula is also a problem to be solved. Based on the experience of myself and other blasting workers, the author analyzes the applicable conditions and application methods of extending the kits, and gives the current practical and reasonable formula for extending the kits.