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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1035.792t,一次爆破量为125万m3,抛掷方量78万m3,抛掷率超过62%。爆后岩石破碎均匀、表面基本无大块,爆区山体标高降低、原最高点降低35m;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。
This paper introduces a large-scale open-air stripping throwing blasting which is mainly composed of bar-shaped kits and bar-shaped kits combined with concentrated kits and successfully carried out on December 17, 1997 at the Zijin Gold Mine in Shanghang, Fujian. The blasting actual total charge of 1035.792t, a burst of 1.25 million m3, throwing side volume of 780,000 m3, throwing rate of over 62%. After the blasting, the rock is crushed evenly and the surface is basically free of large blocks. The elevation of the mountain body in the blasting area is reduced and the original highest point is reduced by 35m. The explosion zone around the blasting area such as the Shanghang TV station above the minimum explosion level of 350m and the blasting center of 450m, Buildings were not damaged, reaching the expected goal.