The chemical damage of sandstone after sulfuric acid-rock reactions with different duration times and its influence on the impact mechanical behaviour

Niu, Qinghe; Hu, Mingwei; He, Jiabin; Zhang, Bo; Su, Xuebin; Zhao, Lixin; Pan, Jienan; Wang, Zhenzhi; Du, Zhigang; Wei, Yuebei

doi:10.1016/j.heliyon.2023.e22346

Cited by 8 publications

(2 citation statements)

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“…Significantly, the BEP technique enhances the permeability of the deposit and reduces the size of mineral particles [133], contributing to a notable improvement in subsequent in situ leaching effectiveness. Enhanced permeability in the deposit facilitates increased flow rates of the leaching solution through the pore spaces, enhancing uranium dissolution efficiency and leaching solution transfer efficiency [104,[134][135][136][137][138].…”

Section: Permeability Modification Technique For In Situ Leachingmentioning

confidence: 99%

A Review of In Situ Leaching (ISL) for Uranium Mining

Li,

Yao

2024

Mining

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Uranium, a cornerstone for nuclear energy, facilitates a clean and efficient energy conversion. In the era of global clean energy initiatives, uranium resources have emerged as a vital component for achieving sustainability and clean power. To fulfill the escalating demand for clean energy, continual advancements in uranium mining technologies are imperative. Currently, established uranium mining methods encompass open-pit mining, underground mining, and in situ leaching (ISL). Notably, in situ leaching stands out due to its environmental friendliness, efficient extraction, and cost-effectiveness. Moreover, it unlocks the potential of extracting uranium from previously challenging low-grade sandstone-hosted deposits, presenting novel opportunities for uranium mining. This comprehensive review systematically classifies and analyzes various in situ leaching techniques, exploring their core principles, suitability, technological advancements, and practical implementations. Building on this foundation, it identifies the challenges faced by in situ leaching and proposes future improvement strategies. This study offers valuable insights into the sustainable advancement of in situ leaching technologies in uranium mining, propelling scientific research and practical applications in the field.

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Section: Permeability Modification Technique For In Situ Leachingmentioning

confidence: 99%

A Review of In Situ Leaching (ISL) for Uranium Mining

Li,

Yao

2024

Mining

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“…Reservoir stimulation can be roughly divided into chemical transformation and physical transformation. − Chemical transformation refers to the use of injected solutions to react with the reservoir to increase its permeability. , This process is limited by the mineral composition of the reservoir when it is applied on-site. On the other hand, physical stimulation involves applying pressure to induce damage and fractures in the reservoir, thereby increasing its permeability .…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Simulation Research on Controllable Shock Wave-Induced Shale Fracturing under Repeated Action

Ding,

Liu,

Zhang

et al. 2024

ACS Omega

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Low permeability is a key geological factor constraining the development of shale gas, and reservoir modification to improve its permeability is a prerequisite. Controlled shock wave fracturing can induce the formation of complex fractures in reservoirs and is expected to become an important means of reservoir modification. However, the mechanism of controlled shock wave fracturing in shale and the geological engineering control factors are unclear. Therefore, this article reveals the mechanism and effect of shock wave modification through small-scale experiments and large-scale numerical simulations. Results show that as the impact number increases, a significant increase in large fractures and fracture connectivity within the shale samples is observed, while the correlation between the geometric parameters of the fractures and the number of impacts is weak. High-energy input in the model will cause a larger range of damage to the rock, accompanied by a smaller attenuation index, indicating that the speed of energy attenuation plays a decisive role in rock damage. The influence of crustal stress is greater than the speed of energy attenuation, and higher crustal stress will inhibit the formation of fractures. A moderate increase in the number of controllable shock waves is beneficial for the fracturing effect; however, further increasing the loading number of controllable shock waves will weaken the strengthening effect of the fracturing effect.

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