共查询到17条相似文献,搜索用时 125 毫秒
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延期时间是毫秒延期雷管质量的主要指标之一,本文通过研究延期体直径、卡中印径向直径及卡印与延期体端面距离对雷管延期时间的影响,用以提高延期时间的精度以及解决雷管的速爆问题。 相似文献
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文章针对我国延期雷管秒量精度低的问题进行了分析。从延期药在制备过程中及在使用过程中两个方面浅析了影响延期精度的主要因素,包括延期药的纯度和粒度、密度、装药结构、外界环境条件和点火方式的影响等。为延期药的生产和使用提供了一些理论依据。 相似文献
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本文通过对不同卡腰尺寸、卡腰位置装配的导爆管雷管延期时间的测定,研究分析卡腰工艺对导爆管雷管延期时间的影响,为提高导爆管雷管精度及卡腰工艺控制提供依据。 相似文献
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城市隧道掘进工程中对爆破振动的控制要求日益严格,因导爆管雷管的固有延期时间存在误差且延期间隔受到限制,不同段别爆破孔的延期时间都有可能重叠,从而增强了爆破振动。在同等地质条件、装药量与钻孔条件下,与导爆管雷管相比较,电子雷管通过精确控制延期时间,能够实现高精度的微差爆破,通过错峰减振机理达到微差爆破降振的目的。经爆破振动测试与分析,与导爆管雷管相比,电子雷管有效降振30%~60%。 相似文献
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为了获得雷管延期药延期精度的影响因素,改变延期药中的硅粉粒度以及延期体的切长后测得单位秒量并进行分析,结果表明:切长较小的延期体单位秒量总趋势上相对较大,可能与延期体的前期燃烧速度未达到相对稳定有关;延期体中硅粉的粒度越小,延期体的单位秒量越低,另外延期体中硅粉的粒度越小,延期体的单位秒量精度越好,其有利于提高雷管的延期精度。 相似文献
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随着民爆器材行业生产中科技进步的突飞猛进,各项手工作业已逐步淘汰,自动化生产已成为民爆产品生产的发展趋势,文章介绍了延期雷管铅索式延期体部分的定位切割自动化设备的研制与开发。延期体是保证延时时间的关键,延期体切长的精度对控制延期雷管的延时精度起着举足轻重的作用。 相似文献
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随着民爆器材行业生产中科技进步的突飞猛进,各项手工作业已逐步淘汰,自动化生产已成为民爆产品生产的发展趋势,文章介绍了延期雷管铅索式延期体部分的定位切割自动化设备的研制与开发。延期体是保证延时时间的关键,延期体切长的精度对控制延期雷管的延时精度起着举足轻重的作用。 相似文献
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R. Herrmann 《Propellants, Explosives, Pyrotechnics》1988,13(3):95-96
The user of delay detonators require a number as great as possible of equidistant time steps. In the case of greater time steps this can lead to the danger of overlapping of burning times between two following time steps. To avoid this, a calculation method is presented for the correction of mean combustion periods that surely eliminates the overlapping of burning times. For very precisely working delay detonators an increase in the number of time steps is possible. 相似文献
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Shepherd M. Tichapondwa Walter W. Focke Olinto DelFabbro Cheryl Kelly 《Propellants, Explosives, Pyrotechnics》2015,40(4):518-525
Chemical time delay detonators are used to control blasting operations in mines and quarries. Slow burning Si BaSO4 pyrotechnic delay compositions are employed for long time delays. However, soluble barium compounds may pose environmental and health risks. Hence inexpensive anhydrous calcium sulfate was investigated as an alternative “green” oxidant. EKVI simulations indicated that stoichiometry corresponds to a composition that contains less than 30 wt‐% Si. However combustion was only supported in the range of 30–70 wt‐% Si. In this range the bomb calorimeter data and burn tests indicate that the reaction rate and energy output decrease with increasing silicon content. The measured burning rates in rigid aluminum elements ranged from 6.9 to 12.5 mm s−1. The reaction product was a complex mixture that contained crystalline phases in addition to an amorphous calcium containing silicate phase. A reaction mechanism consistent with these observations is proposed. 相似文献
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The paper presents the results of a detailed technical investigations of the cause of the fire and subsequent explosion at Peterborough on 22 March 1989 involving a vehicle containing a mixed load of explosives and detonators. Tests were done to examine the sensitivenes and thermal stability of items of the load, and the behaviour of packaged explosives using drop, vibration and fire tests. Communication testing was undertaken with boxes of detonators, and ignition tests with boxes of fuseheads provided information relating to the characteristics of the fireballs generated. From analysis of the scientific data obtained, we conclude that the initial fire resulted from ignition of fusehead combs which were being transported in unauthorized and unsafe packaging, and we suggest a mechanism for detonatino involving the functioning of strewn detonators on fire-damaged boxes of explosives. 相似文献