为了克服在多炮眼和滴水过大的豎井工作面上,用导火線点燃起爆的困难,并节約导火線,我們最近改用点火筒来点燃起爆,效果很好。点火筒是用質量好的厚牛皮紙,制成2—3层一端无口的小圓筒。筒徑根据分組导火線的多少来决定,一般为15～20公厘,筒長为100公厘。筒的外皮要严密涂上防水涂料,筒內裝有引火藥片。引火 In order to overcome the difficulties of firing and detonating with multi-shotholes and overly-drained shaft surfaces and save the fuse, we recently switched to a igniter to initiate ignition. The igniter tube is made of thick kraft paper with good quality and is made of 2-3 layers of small cylinders with no mouth at one end. The diameter of the cylinder is determined by the number of fuses in the group, which is generally 15 to 20 mm and the length of the cylinder is 100 mm. The skin of the tube should be coated with waterproof paint tightly, and the tube should be filled with pyrophoric tablets. Fire ignition