The application of prompt-gamma neutron activation analysis to borehole logging for coal

Borşaru, M.; Biggs, M; Nichols, Wes; Bos, Frans

doi:10.1016/s0969-8043(00)00109-3

Cited by 37 publications

(8 citation statements)

References 4 publications

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“…at is, the thicker the coal seam is, the less it passes through its c-ray; the thinner the coal seam is, the more it passes through its c-ray. In order to verify the accuracy of the mathematical model, this section focuses on the natural c-ray coal thickness sensor developed on the basis of the abovementioned study and summarizes the relevant studies [21][22][23] for measuring the thickness of the remaining coal seam after shearing the coal seam, and meanwhile, its working principle, hardware circuit structure, and software program are introduced in detail.…”

Section: Structural Design Of the Measurement Sensormentioning

confidence: 99%

Performance Analysis of Natural γ-Ray Coal Seam Thickness Sensor and Its Application in Automatic Adjustment of Shearer’s Arms

Yang

Wang

Yan

2020

Journal of Electrical and Computer Engineering

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The technology of coal-rock interface recognition is the core of realizing the automatic heightening technology of shearer’s rocker. Only by accurately and quickly identifying the interface of coal and rock can we realize the fully automatic control of shearer. As the only one used in the actual detection of coal mining machine drum cutting coal seam after the thickness of the remaining coal seam detection method, natural γ-ray has a very practical advantage. Based on the relationship between the attenuation of the natural γ-ray passing through the coal seam and the thickness of the coal seam, the mathematical model of the attenuation of the natural γ-ray penetrating coal seam is established. By comparing the attenuation intensity of γ-ray with or without brackets, it is verified that the hydraulic girders will absorb some natural γ-rays. Finally, this paper uses the ground simulation experiment and the field experiment to verify the correctness of the mathematical model and finally develop the natural γ-ray seam thickness sensor. The sensor has the function of indicating the thickness of the coal seam, measuring the natural γ-ray intensity, and storing and processing the data.

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Section: Structural Design Of the Measurement Sensormentioning

confidence: 99%

Performance Analysis of Natural γ-Ray Coal Seam Thickness Sensor and Its Application in Automatic Adjustment of Shearer’s Arms

Yang

Wang

Yan

2020

Journal of Electrical and Computer Engineering

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“…As the prompt gamma rays are emitted in less than 10 picoseconds, there should be no delay between gamma emission and recording by the detector, and in other words, neutron irradiation and gamma spectrum recording should be done simultaneously. Some elements such as H, B, C, N, P, only emit prompt gamma rays and unlike other elements that emit delayed gamma and can be identified by conventional Neutron Activation Analysis (NAA) method, they can only be identified by PGNAA method [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Feasibility study on PGNAA experiments using a prototype neutron beam at Isfahan MNSR

et al. 2023

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In this study, the feasibility study of Prompt Gamma Neutron Activation Analysis (PGNAA) experiments at Isfahan Miniature Neutron Source Reactor (MNSR) has been done using a prototype neutron beam. This neutron beam was not originally created for this purpose, but previous studies on this neutron beam have shown that it has enough neutron flux to carry out some irradiations outside the reactor core. This prototype neutron beam provided a neutron flux of order 105 n·cm-2·s-1 and a circular diameter of 5 cm for the experiments. In addition, an appropriate setup for High Purity Germanium detector (HPGe) was done at the beam outlet, where the sample is irradiated. A simple shield was also installed to prevent radiation damage to the detector. Experiments were conducted for bulk samples of salt solution with different concentrations and the prompt gamma spectrums have been obtained and analyzed.

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“…Currently, there is online coal quality measurement equipment based on prompt gamma neutron activation analysis (PGNAA) 5,6 technology produced by Thermosher Company of the United States and ScanTech Company of Australia. This technology utilizes the thermal neutron capture reaction between neutrons and the nuclei of various elements in the coal sample, causing the excited nuclei to release characteristic grays in the process of deexcitation.…”

Section: Introductionmentioning

confidence: 99%

Development and application of a rapid coal calorific value analyzer based on NIRS-XRF

Gao,

Wang,

et al. 2023

J. Anal. At. Spectrom.

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The application of prompt-gamma neutron activation analysis to borehole logging for coal

Cited by 37 publications

References 4 publications

Performance Analysis of Natural γ-Ray Coal Seam Thickness Sensor and Its Application in Automatic Adjustment of Shearer’s Arms

Performance Analysis of Natural γ-Ray Coal Seam Thickness Sensor and Its Application in Automatic Adjustment of Shearer’s Arms

Feasibility study on PGNAA experiments using a prototype neutron beam at Isfahan MNSR

Development and application of a rapid coal calorific value analyzer based on NIRS-XRF

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