期刊论文

Experimental Study on Damage and Radon Precipitation Law for Quasi-uranium Ore under Cyclic Blasting Load

中文

矿冶工程

0253-6099

2019

39

1

15-20

10.3969/j.issn.0253-6099.2019.01.004

11475081:国家自然科学基金 11875164:国家自然科学基金 17B228:湖南省教育厅优秀青年项目 2016?JSKSSKS?03:金属矿山安全与健康国家重点实验室开放基金 hunan?0003?2018AQ:安全生产重特大事故防治关键技术科技项目 2018KKZX1004:铀矿冶放射性控制技术湖南省工程研究中心、湖南省铀尾矿库退役治理工程技术研究中心联合开放课题 2018KKK135:南华大学研究生科学基金项目

本校为第一机构

为了深入研究类铀矿岩在循环爆破荷载作用下的损伤及氡析出规律,首先制作了室内爆破装置,然后依据相似理论,以铀尾砂等为原材料制备了类铀矿岩来代替实际的铀矿岩,在室内制成250mm × 250 mm × 200 mm的试块,在试块上设置25个测点,再对试块施加循环爆破荷载,直至试块完全破碎。利用非金属超声波检测仪测量试块每次爆破前后的纵波波速,并换算成对应的损伤值;同时,采用密闭腔体法测量试块爆破后的累积氡浓度,并计算出氡析出率。采用K-Means聚类算法计算出25个测点的权重,进而得到综合损伤变量。研究结果表明,随着爆破次数增加,矿岩损伤呈现出“倒S”形状,且氡析出率与矿岩损伤值的变化具有一致性...

An experimental study was carried out for the damage of quasi-uranium ore under cyclic blasting load and the corresponding radon precipitation law. Firstly, the special indoor blasting equipment was made. Then, based on the similarity theory, the quasi-uranium ore was prepared by uranium tailings and other materials to replace the actual uranium ore. A 250 mm × 250 mm × 200 mm test block was prepared in the laboratory with 25 test points set on it. Cyclic blasting load was applied on the test block until it was completely broken. The longitud...