饱和水泥试样被爆炸激波损伤破碎的尺度研究

Experimental study of damage and fracture zone in cement sample subjected to exploding wave

1.
China University of Petroleum, College of Petroleum Engineering, Dongying 257061, Shangdong, China;
2.
Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China

摘要: 利用水中爆炸冲击波使水泥试样损伤破坏，模拟爆炸采油时激波使岩石损伤开裂的现象。实验获得了适合本实验条件的激波峰压衰减规律pm8.2(W1/3/R)1.46，得知压碎区尺度为集中装药特征尺度的2～5倍、拉伸损伤区尺度为集中装药特征尺度的20～30倍，激波使水泥试样破碎、拉裂的能量占总能量的2%～7%。
- 爆炸力学 /
- 激波衰减 /
- 层内爆炸 /
- 水泥试样 /
- 爆炸载荷 /
- 能耗
Abstract: The phenomenon of the rock damage and fracture by shock wave of exploding in fractures was simulated via the experiment of exploding on the surface of the cement sample in deep water. The peak pressure decline of shock wave, which was suitable for this experiment, was obtained pm8.2(W1/3/R)1.46. Results indicate that the crushed zone and tensile damage zone dimensions are about 2～5, 20～30 times of the powder characteristic dimension respectively. Approximate energy consumed by shock wave to generate crushed and fracture zone in cement sample is 2%～7% of the total energy.
- mechanics of explosion /
- decline of shock wave /
- exploding in fracture /
- cement sample /
- exploding load /
- consume of energy