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Explosives and Explosive Ordnance Disposal
containing
等 压的
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冲击波压力损失与炸药的爆炸压力有关、可以通过计算炸药的密度和爆速来估算。因此、炸药的冲击波压力损失的测定可以通过实验引人一些诸如温度、静态和动态预压及导爆索支线等变量来确定
The shock pressure loss is related to the explosive's detonation prepressure, which can be estimated by knowing the density and detonation velocity of the explosive. Therefore, the SLF for a test explosive can be experimentally determined by introducing in the test certain additional variables, such as temperature,static and dynamic pre-compression and detonating cord downline
水压爆破炮孔中水的等效药柱作用
炸药在有水炮孔中爆炸时,冲击波经孔壁多次反射后,沿炮孔轴线方向传播的冲击波压力和所携带能量的衰减速度大大降低,波形拉宽,作用时间延长。这时可认为水的压力为准静态压力,各方面压力相等。沿炮孔轴线作用孔壁的水压力是均匀的,相当于等效药柱的作用
equivalent charge column effect of water in blasthole during water pressure blasting
砂浆抗压强度的强度等级
砌筑砂浆的强度等级是以边长为70. 7mm 立方体试件,在标准养护条件下,用标准试验方法测得28天龄期的抗压强度值〈MPa〉来确定
strength grade of mortar
近来的研究提供了更为准确的气象数据、可以用来预测和评价诸如噪声、飞尘抑制、气体排放以及冲击波超压等对环境的影响
Recent research has provided more accurate meteorological data that may be used for the prediction and assessment of environmental effects such as noise, dust control, and gaseous emission as well as airblast overpressure
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