大当量地下浅埋爆炸真空室模拟相似材料研究

doi:10.13722/j.cnki.jrme.2016.1539

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Abstract

Based on the methods of physical modeling of large-scale excavation explosions in the vacuum chamber，the similarity conditions for the experimental material parameters are given. By use of shear cell module of the FT4 multifunctional powder flow tester，the main physical parameters of the quartz sands with particle sizes from 0.3 to 0.6 mm have successfully gained for the first time，and the relationships between the shear resistance and particle size，moisture(glycerin) content for the quartz sand are presented. The applicability in the laboratory model of large-scale throw blasting was also discussed. The results show that，the characteristic grain sizes range from 0.3 to 0.6 mm for the experimental materials could be used as the simulation material of the large-scale underground explosions with the equivalent of 0.1–100 kt TNT. The material parameters for the shear strength of quartz sands are well satisfied the similarity conditions of large scale excavation explosions considering the effect of gravity，and suggested wide applicability to the model test. The material parameters can provide important reference and basis for the experimental simulation and numerical calculation of large scale throw blasting.

Key words： rock mechanics cratering explosion similar materials dimensional analysis vacuum chamber simulation rotational shear cohesion

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	Articles by authors
	XU Xiaohui1
	2
	QIU Yanyu1
	2
	WANG Mingyang1
	2
	ZHAO Zhangyong2

Cite this article:

XU Xiaohui1,2,QIU Yanyu1, et al. Similar materials for vacuum chamber model test under large scale throw blasting[J]. , 2018, 37(S1): 3550-3556.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2016.1539 OR https://rockmech.whrsm.ac.cn/EN/Y2018/V37/IS1/3550

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