五月十日,西安市长安县石砭峪水库定向爆破筑坝成功。爆破炸药总量为一千五百九十四吨,是目前国内最大的一次定向爆破筑坝。这次定向爆破成功,为我国在水利水电建设中,采用定向爆破的方法筑坝,积累了丰富的资料。这是毛主席革命路线的伟大胜利,是批林整风的丰硕成果。当天十二时正,发布起爆命令后,只听震天动地一声巨响,山谷中升起巨大的烟云,主、副爆区的东西两座大山倾刻倒下,枉流千年的石砭峪河栏腰斩断,堆成了一道巨型石坝。经过测量,定向爆破符合设计要求,达到预期效果。爆破量一百三十六万立方米,比原设计一百一十万立方米增中了二十六万立方米.上坝堆和平均高度五十五米,比原预定的五 May 10, Chang’an County, Xi’an Shiyan valley reservoir burst blasting dam success. The total amount of explosive explosives is 1, 594 tons, which is the largest one at present in China for directional blasting. The directional blasting success, for our country in the construction of water conservancy and hydropower, the method of directional blasting dams, has accumulated a wealth of information. This is a great victory won by Chairman Mao’s revolutionary line and a fruitful result of criticizing Lin rectifying the wind. Twelve o’clock on the same day, released after the detonation order, only heard a loud noise moving earth, a huge cloud of smoke rises in the valley, the main and sub explosion area east and west of the two mountains pouring down in vain Millennium stream stone Valley cut off the waist column, pile into a giant dam. After measurement, directional blasting meets the design requirements to achieve the desired results. The blasting volume was 1,360,000 cubic meters, an increase of 260,000 cubic meters from the original design of 1,100,000 cubic meters. The upper dam stack and the average height of 55 meters were 5