Experimental Study on the Insulation Layer Thickness of a Novel Ice Coring Device in Loose Sandstone-Type Uranium Deposits

Chaoyang Huang, Jianming Peng, Yanliang Li, Moke Lian, Chao Guo, Yongjiang Luo and Kun Bo
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Chaoyang Huang: College of Construction Engineering, Jilin University, Changchun 130026, China
Jianming Peng: College of Construction Engineering, Jilin University, Changchun 130026, China
Yanliang Li: College of Construction Engineering, Jilin University, Changchun 130026, China
Moke Lian: College of Construction Engineering, Jilin University, Changchun 130026, China
Chao Guo: No. 240 Research Institute of Nuclear, CNNC, Shenyang 110141, China
Yongjiang Luo: State Key Laboratory of Coal Mine Disaster Dynamics and Control, College of Resources and Safety Science, Chongqing University, Chongqing 400044, China
Kun Bo: College of Construction Engineering, Jilin University, Changchun 130026, China

Energies, 2021, vol. 14, issue 21, 1-14

Abstract: The target strata of sandstone-type uranium deposits are usually located in the fragile and loose strata, which makes it difficult to obtain core samples; consequently, a novel ice coring device for loose sandstone-type uranium deposits is proposed to solve this problem. Experiments proved that the artificial sample can replace the natural sample, and the coring method has high reliability. Ensuring the allegro formation of an ice valve with a given cold source is critical for this coring system, and reducing the loss of cold energy with help of insulation layer is one of the methods to speed up the formation of ice valve. Since the diameter of the drill tool is limited by its working scenario, the thickness of insulation layer is limited to ensure the size of core. Therefore, this paper conducted laboratory experiments of the insulation layer with different thicknesses to study the effect of the insulation layer on the formation of the sand–ice valve. Results show that the insulation layer can reduce the loss of cold energy during the freezing process and significantly affect the formation time of the sand–ice valve. When the thickness of the aerogel insulation layer is 2 mm, the freezing time is 44% shorter than that without insulation layer. According to the tests, the novel ice coring device is expected to solve the coring problem in loose sandstone-type uranium deposits.

Keywords: sand–ice valve; ice valve tube; insulation layer; sandstone-type uranium deposits; freezing time (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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