千吨级露天剥离定向抛掷大爆破

A Thousand-Ton Explosive Charge Directional Throw Open-air Stripping Blasting

介绍了1997年12月17日在福建上杭紫金山金矿成功地进行的一次以条形药包为主，条形药包与集中药包相结合的露天剥离定向抛掷大爆破．该次爆破实际总装药量为1，035，792kg，一次爆方量为123万M3，抛掷方量77万M3，抛掷率达62％以上．爆后观察：岩石破碎均匀，表面基本无大块，爆区山体标高降低，最大降低量达45m以上；高于最低起爆水平350m，离爆破中心450m的上杭县电视转播站等爆区周围建、构筑物未受损伤，达到了预期目标．

A successful directional throw open = air stripping blasting in Zhijinshan Gold Mine of Fujian Province on Dec. 17th, 1997 is introduced in thes paper. The charge pattern of this blasting is linear charge and supplement with point charge. The amount of explosive is 1,035, 792kg. The volume of rock and soil at this blasting is 1,230,000M3 with a volume of 770, 000M3 throw. The level of blasting area is reduced by over 45 metres. It is 350 metres above the lowest blasting level. Neither the TV relay station, which is 450 far from the center of blasting area, of Shanhang Country nor the other nearby building are damaged. The desited results have been achieved.