| 69.8m高冷却塔定向爆破拆除 |
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| 作者单位： | ;1.北京科技大学;2.北京科技大学;3.北京恩菲爆破公司 北京100083;4.河北建筑科技学院 |
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| 摘 要： | 介绍了一座双曲线钢筋混凝土筒式结构冷却塔的定向爆破拆除。阐述了冷却塔结构特点、爆破难点、总体拆除方案、设计参数的选择及飞石防护措施等。爆破取得预期效果,可为同类工程提供参考。
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| 关 键 词： | 拆除爆破 筒式结构 冷却塔 飞石防护 |
EXPERIMENTAL STUDY ON THE EFFECTS OF BLASTING WITH CONCENTRATED AND SUB-CONCENTRATED CHARGES |
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| Affiliation: | , 3. Beijing Enfei Blasting Corp.,Beijing 100038, China) |
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| Abstract: | A large number of simulation tests for chamber blasting with concentrated or sub-concentrated charges were carried out in a site.The blasting cone and throwing-piling effect resulted from two kinds of charges were analyzed.The comparison between the tested and calculated vales of parameters such as upper- and down- broken lines and depth of the blasting cone and the maximum throwing distance for two kinds of charges was made.At the same time,the optimal spacing of sub-concentrated charges was investigated.It is concluded from the tests that the sub-concentrated charge could be used for improvement of throwing-piling effect in the construction of a dam by directional blasting and there is an optimal spacing of sub-concentrated charge favorable to throwing-piling on the condition of constant charge weight calculated by an empiric formula. |
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| Keywords: | Concentrated charge Sub-concentrated charge Blasting cone Throwing-piling Optimal spacing |
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