《煤炭科学技术》编辑部转来舒兰矿务局邱云海同志来信,对本刊1977年第1期所刊的“放炮按钮盒”一文提出一些意见。现答复如下:1、放炮按钮盒不具有超前切断电源装置,不能防止通电后因爆落岩石砸破电缆产生短路火花,有引起瓦斯爆炸的危险。不如电容式发爆器安全可靠。答:该文章所介绍的放炮按钮盒仅是对 The editorial department of “Coal Science and Technology” turned to Comrade Qiu Yunhai from Shulan Mining Bureau to give some opinions on the article entitled “Blasting button box” published in the first issue of 1977. Now the answer is as follows: 1, blasting button box does not have cut off the power supply ahead of schedule, can not prevent the power after the burst of rock smashed cable short-circuit sparks, causing the danger of gas explosion. Capacitor explosion than safe and reliable. A: The blast button box described in this article is only correct