Preparation and radon exhalation characteristics of fracture granite similar materials in Beishan underground research laboratory

Yuhang Wang; Hong Wang; Hui Ling; Changshou Hong; Xiangshuai Wang; Wenjun Lu; Qingmin Zhang; Ziqi Cai

doi:10.1016/j.jhazmat.2025.137121

Preparation and radon exhalation characteristics of fracture granite similar materials in Beishan underground research laboratory

J Hazard Mater. 2025 Jan 9:487:137121. doi: 10.1016/j.jhazmat.2025.137121. Online ahead of print.

Authors

Yuhang Wang¹, Hong Wang², Hui Ling³, Changshou Hong⁴, Xiangshuai Wang⁵, Wenjun Lu⁵, Qingmin Zhang⁶, Ziqi Cai⁶

Affiliations

¹ School of Resources, Environmental and Safety Engineering, University of South China, Hengyang 421001, China; Department of Nuclear Science and Technology, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
² School of Resources, Environmental and Safety Engineering, University of South China, Hengyang 421001, China; CAEA Innovation Center for Geological Disposal of High-Level Radioactive Waste, Beijing 100029, China. Electronic address: [email protected].
³ Beijing Research Institute of Uranium Geology, Beijing 100029, China; CAEA Innovation Center for Geological Disposal of High-Level Radioactive Waste, Beijing 100029, China.
⁴ School of Resources, Environmental and Safety Engineering, University of South China, Hengyang 421001, China; CAEA Innovation Center for Geological Disposal of High-Level Radioactive Waste, Beijing 100029, China.
⁵ School of Resources, Environmental and Safety Engineering, University of South China, Hengyang 421001, China.
⁶ Department of Nuclear Science and Technology, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China.

PMID: 39818052
DOI: 10.1016/j.jhazmat.2025.137121

Abstract

The mechanism of radon exhalation from surrounding rock fracture has important guiding significance for radon prevention and control in underground research laboratories. The optimal ratio scheme of similar materials in the granite surrounding rock of Beishan underground laboratory was obtained by orthogonal test. The radon exhalation characteristics of fractured rock samples under dry and saturated conditions were obtained by using 10 standard joint roughness coefficient (JRC) curves. The radon exhalation rate of the dry sample and the saturated sample is linearly correlated with the JRC grade, and the radon exhalation rate of the dry sample is 82.65 % higher than that of the saturated sample. There was a good correlation between fracture structure parameters (σ_i, SF, D0) and radon precipitation in fractured rock mass, which is helpful to reveal the mechanism of radon exhalation from fractured rock mass.

Keywords: Fracture; JRC grade; Radon exhalation; Similar materials.