低渗透砂岩型铀矿床爆破增渗模型试验及增渗机制研究

doi:10.13722/j.cnki.jrme.2015.1306

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Abstract To solve the low permeability of sandstone-type uranium deposits to satisfy the basic needs of in-situ leaching mining，this paper presents the preliminary and optimized model tests of the blasting-enhanced permeability method of low-permeability sandstone-type uranium deposits(BEPUD). The permeability of the models was also evaluated based on the BEPUD. Experimental results indicate that the permeability of the models after blasting increased by two to three orders of magnitude. The enhanced permeability range was approximately 70 times the radius of the blasting cartridge，and the reasonable decoupling coefficient ranged from 1.5 to 3.0. The mechanisms of blasting-enhanced permeability were analyzed based on the dynamic fracturing of rock，the millisecond blasting，the decoupled-charge blasting，the space compensation，and the drive effect of exploding gas. This research lays the foundation for perfecting BEPUD and develops a pilot site test and scale application of this approach.

Key words： rock mechanics blasting-enhanced permeability model test permeability enhanced-permeability mechanism

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	Articles by authors
	WANG Wei1
	2
	LI Xiaochun2
	YUAN Wei1
	2
	WANG Qizhi1
	3
	LI Guifeng4

Cite this article:

WANG Wei1,2,LI Xiaochun2, et al. Model test and mechanism study of the blasting-enhanced permeability of sandstone-type uranium deposits of low-permeability[J]. , 2016, 35(8): 1609-1617.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2015.1306 OR https://rockmech.whrsm.ac.cn/EN/Y2016/V35/I8/1609

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