Laboratory Experimental Laws for the Radon Exhalation of Similar Uranium Samples with Low-Frequency Vibrations

Cai, Ziqi; Li, Xiangyang; Lei, Bo; Yuan, Jing-fan; Hong, Changshou; Wang, Hong

doi:10.3390/su10082937

Cited by 5 publications

(4 citation statements)

References 14 publications

(12 reference statements)

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“…The frequency of the debris flows is lower than 50 Hz, but after the front passed, the frequency is between 50 and 100 Hz. In these frequency ranges there is an increase in radon emanation and exhalation according to Cai et al (2018) and Cai et al (2019). These authors confirmed that one of the main sources of ground vibration caused by debris flows is the interaction of rocks or boulders with the channel bed.…”

Section: Rock and Debris Avalanches Due To Flooding Of Rivers During ...mentioning

confidence: 60%

“…The author considers the increased delivery of radon from the subsoil due to the enhanced upward diffusion. Cai et al (2018) and Cai et al (2019) studied the influence of low-frequency vibrations on the radon exhalation from uranium samples. The results showed that the radon exhalation increased with the rising vibration frequency until frequencies of about 50 to 70 Hz, but fell slowly after reaching the peak.…”

Section: Rock and Debris Avalanches Due To Flooding Of Rivers During ...mentioning

confidence: 99%

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Measurement of radon in soils of Lima City - Peru during the period 2016-2017

Lázaro¹,

Herrera²,

Pereyra³

et al. 2019

Earth sci. res. j.

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Lima City is situated on alluvial fan deposits of rivers flowing through geological formations that contain different levels of uranium. In this paper, a study is made on the average spatial and temporal behavior of radon gas in soils of Lima City. Radon concentration was determined using the LR-115 type 2 track detector during 36 periods, of 14 days each, in twenty holes distributed in the fifteen districts of Lima City. Radon concentration in soil pores ranged from 0.1 to 64.3 kBq/m3 with an average value of 5.6 kBq/m3. The average radon concentration in soil gas was about two times lower in winter than in the other seasons. High radon values during October/November 2017 were related to the earthquakes perceived in Lima City in that period. The highest radon concentrations were found in areas of alluvial deposits whose parental material has been removed from the Quilmaná and Huarangal volcanics by the Chillón and Huaycoloro Rivers. Soil gas radon concentrations were even higher in areas closer to volcanic and less distant from rivers. During the period of maximum flooding of the Chillón, Rímac and Lurín rivers, due to the natural phenomenon “El Niño Costero”, anomalous high soil radon concentrations were observed in most of the measurement sites located near rivers. These high radon values were associated with ground vibrations caused by rock and debris avalanches in rivers and creeks.

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Section: Rock and Debris Avalanches Due To Flooding Of Rivers During ...mentioning

confidence: 60%

Section: Rock and Debris Avalanches Due To Flooding Of Rivers During ...mentioning

confidence: 99%

Measurement of radon in soils of Lima City - Peru during the period 2016-2017

Lázaro¹,

Herrera²,

Pereyra³

et al. 2019

Earth sci. res. j.

View full text Add to dashboard Cite

show abstract

“…The appropriate blasting method should be selected based on the burial depth of the deposit [129]. For shallow deposits, either drilling-blasting [130] or chamber-blasting [131] methods can be employed. Usually, drilling blasting is preferable for shallow-buried thick deposits due to its more pronounced cost-effectiveness [132].…”

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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“…Similar material simulating geotechnical mechanical properties must have the basic characteristics of high gravity, low strength, low deformation modulus, and variable internal friction angle. Materials that meet these requirements do not exist in nature and must be combined 2 of 15 manually [6,7]. In sum, selection and proportioning of similar materials play a decisive role in the physical similarity simulation test [8,9].…”

Section: Introductionmentioning

confidence: 99%

Experiments on Material Proportions for Similar Materials with High Similarity Ratio and Low Strength in Multilayer Shale Deposits

Shi

et al. 2021

Applied Sciences

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It is important to systematically investigate the similar materials with high similarity ratio and low strength in multilayer shale deposits, to provide a scientific basis and experimental basis for the research of underground mining of multilayer shale deposits. In this paper, using an orthogonal experimental method, the physical and mechanical parameters of different material proportions were analyzed with four control factors of mica powder/standard sand, filling material/bonding material, Portland cement/gypsum, silicone oil ratio. Twenty-five groups of material proportioning schemes were designed, and the density, porosity, compressive strength, and elastic modulus of each group of materials were measured. Through the range analysis and significance analysis, the influence of control factors on the material parameters was explored, and multivariate linear regression analysis of test results was carried to eliminate outliers. The result showed that the physical and mechanical parameters of similar materials prepared according to the proportioning scheme were widely distributed, which can meet the preparation requirements of similar materials with different lithologies. The density and compressive strength were most affected by the ratio of Portland cement/gypsum, the porosity was most affected by the ratio of filling material/bonding material, and the elastic modulus was mainly controlled by the silicone oil ratio. The proportioning scheme was applied to three similar prepared shale materials with large lithology differences. The error between actual similar constant and design similar constant of low strength similar material was less than 1.62%. The physical and mechanical parameters of similar materials were in good agreement with the original rock.

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Laboratory Experimental Laws for the Radon Exhalation of Similar Uranium Samples with Low-Frequency Vibrations

Cited by 5 publications

References 14 publications

Measurement of radon in soils of Lima City - Peru during the period 2016-2017

Measurement of radon in soils of Lima City - Peru during the period 2016-2017

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

Experiments on Material Proportions for Similar Materials with High Similarity Ratio and Low Strength in Multilayer Shale Deposits

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