开采靠界条带并在最终位置形成边帮的特殊穿爆工艺,已经在露天矿得到广泛的应用。为减少爆炸波对边界岩体的作用,规定对装药量加以限制,改用单列孔和双列孔爆破,使用减小直径的倾斜深孔,制造隔离缝等等。露天采场最终边界处进行爆破作业,应考虑在大范围内可能存在的不利分布的割裂的岩体。大裂缝和其他弱面。在这种情况下,靠界条带内松动深孔间距应加以选择确定,以尽量限制这类裂缝向需保护岩体内发展,并且可采取其等于发生裂缝区的半径。必须进行广泛的实验研究工作,以确定能保 The special explosion-proofing technology that exploits the boundary strip and forms the side edge in the final position has been widely used in the open-pit mine. In order to reduce the effect of blast waves on the boundary rock mass, it is stipulated that the charge should be limited to single-row and double-column blasting, the use of reduced-diameter inclined deep holes, the production of isolation seams and the like. Blasting operations are to be carried out at the final boundary of the open pit, taking into account the unfavorable distribution of the fractured rock mass that may exist in a wide area. Large cracks and other weak noodles. In this case, the spacing of loose deep holes in the boundary strip should be chosen and determined so as to minimize the development of such cracks into the body to be protected and to take a radius equal to the area where the fracture occurred. Extensive experimental research must be conducted to ensure that it can be guaranteed