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东川白锡腊分队过去在坑道掘进爆破中,使用直径32和35公厦的药包,而钎头直径则为42～45公厘,炮眼最终直径大于药包直径10公厘.这就减小了装药密度,从而减弱了爆破气体的最初压力,降低了炸药的功能.因为装药密度(药包体积与其所占炮眼容积之此值)愈大,爆炸功能愈高.因此,应使炮眼直径与药包直径之间的差为最小.该队现采用小直径钎头凿岩,不仅解决了上述问题,而且大大地提高了穿孔速度.这种提高凿岩爆破的效率、加快掘进速度、降低成本的简而易举的技术改进,是值得注意的,希有关单位研究试验推广.
In the past, the Dongchu Baiyira Group used the kits of 32 and 35 mansions in the tunnel excavation blasting, while the diameter of the drill head was 42-45 mm and the final diameter of the blasthole was 10 mm more than the diameter of the kits Small charge density, thereby reducing the initial pressure of the blasting gas, reducing the function of the explosive because the higher the charge density (the volume of the cartridge and the volume of the blasthole it occupies), the higher the explosive function. Therefore, The difference between the diameter of the blasthole and the diameter of the ladle is the smallest.The team now employs a small diameter drill bit to drill the rock, which not only solves the above problems, but also greatly increases the perforation speed.This increases the efficiency of the rock blasting and accelerates the speed of excavation It is noteworthy that it is worth noting that it is worth noting that the relevant units should study and test the promotion of the simple technical improvements to reduce costs.