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硐室爆破是开挖大量土石方的快速施工方法之一,它的主要特点是时间快,节省劳力多,工效高,但用药稍多。我们为了适应新形势的需要,共作了大中型爆破点14个(其中缝子炮4个),共用硝铵炸药1,745.8公斤,黑火药1,099公斤,共开坚石9,420立公方,平均每立公方需混合药0.30公斤,节约了劳动日约6,000工日,其中最大的炮眼深度为8.5公尺,用药705公斤,爆破岩石约2,200立方公分在实际工作中我们取得了一些经验和教训,特介绍于下:
Chamber blasting excavation is a large number of earth and stone rapid construction methods, one of its main features is fast, labor-saving, high efficiency, but a little more medication. In order to meet the needs of the new situation, a total of 14 large and medium-sized blasting sites (including 4 slit guns) were jointly built. A total of 1,745.8 kg of ammonium nitrate explosive and 1,099 kg of black powder were used for a total of 9,420 cubic meters of open pit stone, The public needs to mix 0.30 kg of medication, saving about 6,000 working days, of which the largest hole depth of 8.5 meters, the treatment of 705 kg, blasting about 2,200 cubic cm of rock in the actual work we have made some experience and lessons, special Introduced in the next: