摘要
为了掌握通风作用下铀矿山采场爆破铀矿石堆氡析出规律,以留矿法采场为对象,自制模拟采场颗粒堆积型射气介质氡析出的试验装置,选用我国南方铀矿山粒径小于6 mm的破碎铀矿石为样品,试验研究矿石堆高为20 cm和40 cm条件下,采场排风氡浓度和矿堆氡析出份额与通风方式与通风风量的关系。结果表明:采场排风氡浓度随着通风风量的增加而降低,矿堆氡析出份额随通风风量的增大而增大;同种通风方式和通风风量下,采用下行风的采场排风氡浓度和氡析出份额小于上行风;通风风量和风流方向相同时,中央通风采场排风氡浓度和矿堆氡析出份额均低于端部通风;相同风量下,中央通风采场作业空间单位长度的氡浓度增量大于端部通风。
In order to study the law of radon exhalation from the blasted uranium ore heap in the stope of uranium mine,the shrinkage stope was chosen as the study subject and simulation experiments were carried out using a self-made experimental device of particle-packing emanation media.The uranium ore sample with a particle size of less than 6 mm was taken from an uranium mine in the south of China.Relationships between radon concentration,radon exhalation portion and ventilation mode,ventilation air volume were studied experimentally under the condition of changing the ore heap height from 20 cm to 40 cm.The results show that the exhaust radon concentration decreases with the increase of air volume,radon exhalation portion of the heap increases with the increase of ventilation air volume,that under the same ventilation air volume and ventilation mode,the exhaust radon concentration and radon exhalation portion of descentional ventilation is lower than that of ascentional ventilation,that when the ventilation air volume and airflow direction are the same,exhaust radon concentration and radon exhalation portion of ore heap in central ventilation stope is lower than that of end ventilation stope,and that radon concentrationincrement per unit length of the workspace in central ventilation is greater than that in end ventilation when the air volume is the same.
作者
叶勇军
苏杭
丁德馨
余修武
钟永明
梁涛
YE Yongjun SU Hang DING Dexin YU Xiuwu ZHONG Yongming LIANG Tao(School of Environment and Safety Engineering, University of South China, Hengyang Hunan 42100, China Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang Hunan 421001, China)
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2017年第8期144-149,共6页
China Safety Science Journal
基金
国家自然科学基金资助(11575080
111050609)
国家安全生产监督管理总局安全生产重大事故防治关键技术科技项目(hunan-0015-2015AQ)
南华大学博士科研启动基金资助(2015XQD38)
关键词
颗粒堆积型射气介质
通风方式
氡浓度
氡析出份额
留矿法采场
particle-packing emanation media
ventilation mode
radon concentration
radon exhalation portion
shrinkage stope
