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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摘要为满足我国核电快速发展对铀资源的大量需求，解决制约低渗透砂岩型铀矿床原地浸出顺利实施的瓶颈，基于笔者提出的低渗透砂岩型铀矿床爆破增渗方法，开展低渗透砂岩型铀矿床爆破增渗初步模型试验和优化模型试验及模型渗透性试验，试验结果表明：爆破后模型渗透率提高2～3个数量级；增渗范围大约为70倍的药包半径；合理的不耦合系数范围为1.5～3.0。此外，根据试验结果，从岩石动态破裂、微差爆破、不耦合装药爆破以及空间补偿和爆生气体驱动作用等方面探讨低渗透砂岩型铀矿床爆破增渗机制，分析爆破增渗的关键影响因素，为完善低渗透砂岩型铀矿床爆破增渗理论、技术方案以及现场中试试验和规模应用打下基础。

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	王伟1
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	李小春2
	袁维1
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	王奇智1
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	李桂峰4

关键词 ：岩石力学, 爆破增渗, 模型试验, 渗透性, 增渗机制

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

引用本文:

王伟1，2，李小春2，袁维1，2，王奇智1，3，李桂峰4. 低渗透砂岩型铀矿床爆破增渗模型试验及增渗机制研究[J]. 岩石力学与工程学报, 2016, 35(8): 1609-1617.
WANG Wei1，2，LI Xiaochun2，YUAN Wei1，2，WANG Qizhi1，3，LI Guifeng4. Model test and mechanism study of the blasting-enhanced permeability of sandstone-type uranium deposits of low-permeability. , 2016, 35(8): 1609-1617.

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http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2015.1306 或 http://www.rockmech.org/CN/Y2016/V35/I8/1609

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