工程爆破

2008, (03) 67-69+62

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延期雷管的殉爆和抗冲击波性能
ON SYMPATHETIC DETONATION AND ANTI-SHOCKWAVE PERFORMANCE OF DELAY DETONATORS

王尹军;颜事留;李玉景;方宏;
WANG Yin-jun1,YAN Shi-liu2,LI Y-jing3,FANG Hong4(1. Beijing General Research Institute of Mining and Metallurgy,Beijing 100044,China;2. Guangdong Hongda Blasting Engineering Co. Ltd,Guangzhou 510623,China;3. Guizhou Kaiyuan Blasting Engineering Co. Ltd,Guiyang 551400,China; 4. Jiangsu Huamei Engineering Construction Group Co. Ltd,Xuzhou 221131,Jiangsu,China)

摘要(Abstract):

延期雷管的准确引爆是保证毫秒延时爆破作业成功实施的基本保证。但如果先被引爆的炮孔装药产生的冲击波传播至后爆炮孔对其内的雷管产生较大作用时,雷管有可能产生殉爆或受到损坏,这两种情况均不利于爆破工程的实施。作者观测了雷管在水中受到冲击波作用之后的殉爆与受损情况,并作了分析。结果表明,雷管受到的冲击波作用较大时(>130MPa)容易发生殉爆,作用较小时雷管容易受到损坏而可能无法被激发,但如果被成功激发,其起爆能力不会下降。因此,在爆破施工中,炮孔间距不应小于致使雷管损坏或殉爆的距离。必要时应该对延期雷管采取保护措施。
The timely and exact ignition of delay detonator is the necessity of the successful completion of millisecond blasting. But when the shockwave produced by the first-fired charges propagates to the later-fired blast-hole charges and make a great action on the delay detonators in them,the detonators may be detonated or damaged. Both the two resulting circumstances are not favorable to the practice of the millisecond blasting. The sympathetic detonation or damage of the detonators after acted upon by shockwave in water were observed and analyzed by us. The observation shows that the detonators are prone to sympathetic detonation when subjected to a larger shockwave(>130MPa),and are prone to damage,and hence,could not be fired when subjected to a relative smaller scale shockwave,but for a successful firing,its initiating ability would have no decline. The finding suggested that the hole spacing should not be less than the spacing which the resulted shockwave from first-fired charges can make the detonators in the later-fired charges be detonated by influence or damaged,and if necessary,safeguard measures should be taken for the detonators.

关键词(KeyWords): 毫秒延时爆破;延期雷管;殉爆;冲击波
Millisecond blasting; Delay detonators; Sympathetic detonation; Shockwave

Abstract:

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基金项目(Foundation): 国家自然科学基金资助项目(50704005)

作者(Author): 王尹军;颜事留;李玉景;方宏;
WANG Yin-jun1,YAN Shi-liu2,LI Y-jing3,FANG Hong4(1. Beijing General Research Institute of Mining and Metallurgy,Beijing 100044,China;2. Guangdong Hongda Blasting Engineering Co. Ltd,Guangzhou 510623,China;3. Guizhou Kaiyuan Blasting Engineering Co. Ltd,Guiyang 551400,China; 4. Jiangsu Huamei Engineering Construction Group Co. Ltd,Xuzhou 221131,Jiangsu,China)

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