第三讲 实现光面爆破的技术要点 一、炸药 为消除爆破时在炮眼周围造成的粉碎圈、减少放射状裂隙的范围,从光面爆破的作用原理可知,应选用低猛度、低爆速、低密度而传爆性能好的炸药。近年来,国外已生产出光面爆破的专用炸药,如瑞典的古立特炸药,日本的SB新桂炸药等。我国目前尚无光面爆破专用炸药,因此多选用中等威力的硝酸按类炸药。这类炸药难以满足上述要求,所以,主要靠施工中采取不偶合装药或改变装药结构来实现光面爆破,一般多采用小直径药卷(炮眼眼径不变)。据一些单位试验,药卷直径采用25毫米为宜,药径过细爆轰不稳定,甚至产生拒爆。如开滦马家 Lecture 3 to achieve the technical point of smooth blasting Explosives blasting in order to eliminate blasting around the blasthole caused by the smashing ring to reduce the scope of radial cracks, blasting from the principle of action shows that should be used low-fierce, low detonation velocity, low Explosive explosive density and good performance. In recent years, foreign countries have produced special blast explosives explosives, such as Sweden’s ancient Litas, Japan’s SB new gunpowder explosives. At present, there is no special blasting agent for smooth blasting in our country, so we choose medium-sized nitric acid as the explosive agent. Such explosives are difficult to meet the above requirements, so mainly rely on the construction of non-coupled charge or change the charge structure to achieve smooth blasting, the general use of small diameter coil (hole diameter unchanged). According to some units of experiments, the diameter of the drug coil is appropriate with 25 mm, too fine drug resistance detonation instability, and even refused to burst. Such as the Kailuan Ma family