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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。
In order to meet the huge demand for uranium resources in China’s rapid development of nuclear power and to solve the bottleneck restricting the in-situ leaching of low-permeability sandstone-type uranium deposits, based on the method proposed by the author for blasting and permeability enhancement of low-permeability sandstone-type uranium deposits, The preliminary model test, optimization model test and model permeability test of the blasting enhanced permeability of the ore deposit show that the model permeability increases by 2-3 orders of magnitude after blasting, the radius of the package increases by about 70 times, the reasonable uncoupling coefficient The range is 1.5 ~ 3.0. In addition, based on the experimental results, the mechanism of blasting seepage enhancement in low permeability sandstone-type uranium deposits is discussed from the dynamic rock burst, micro-difference blasting, uncoupled charge blasting and the space compensation and explosion gas drive. The key influence of blasting seepage enhancement Factors, and lay the foundation for perfecting the theory of blasting infiltration and infiltration of low-permeability sandstone-type uranium deposits, technical solutions and on-site pilot test and application of scale.