圆管状多孔射气介质氡析出规律的理论研究
作者:
黄俊尧;叶勇军;吴文浩
期刊:
南华大学学报(自然科学版) ,2020年34(1):1-8+15 ISSN:1673-0062
作者机构:
南华大学 资源环境与安全工程学院,湖南 衡阳421001;[黄俊尧; 叶勇军; 吴文浩] 南华大学
关键词:
多孔射气介质;数学模型;压力;扩散系数;氡析出率
摘要:
基于在多孔射气介质中氡的渗流-扩散迁移理论,建立了圆管状多孔射气介质氡的迁移数学模型,并获得了稳态条件下氡浓度分布的解析解和氡析出率的计算公式。通过研究,获得以下结论:1)圆管管壁内靠近圆管内外表面的氡浓度和氡浓度梯度随着扩散系数的增大而减小;2)圆管内外表面的氡析出率随扩散系数的增大而增大,并逐渐趋于最大值;整个圆管的氡析出份额随扩散系数的增大而增大并逐渐趋于1;3)圆管管壁内的氡浓度峰值的大小随着圆管内外表面压差值的增大而减小;其中氡浓度峰值最大时压差为20 Pa;氡浓度峰值最小时压差为60 Pa;4)当圆管内外表面存在压差时,高压侧的圆管表面的氡析出率随着压力梯度的增大而减小,并逐渐趋于0;低压侧的圆管表面的氡析出率随着压力梯度的增大而增大,并逐渐趋于最大值;整个圆管的氡析出份额随着压差值的增大而增大,并逐渐趋于1。
语种:
中文
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以职业资格认证为导向的专业硕士研究生课程体系建设与改革研究综述
作者:
蒋复量;刘永;余修武;郑平卫;冯胜洋;...
期刊:
高教学刊 ,2019年(3):1-4 ISSN:2096-000X
作者机构:
南华大学 资源环境与安全工程学院,湖南 衡阳,421001;[郑平卫; 刘永; 冯胜洋; 余修武; 叶勇军; 李向阳; 蒋复量] 南华大学
关键词:
全日制专业硕士;职业资格;课程体系;建设与改革
摘要:
随着经济发展,企业对高度专业化人才的需要日益增加,研究生作为高学历人士自然而然受到重视。从培养目的来看,专业型硕士比学术型硕士更符合企业的要求。同时,拥有职业资格证书或接受过职业资格考试课程训练的求职人员越来越受到用人单位的认可和青睐。文章依据高校学科现状,提出以职业资格认证为导向,由此通过教学改革,对专业硕士研究生课程体系进行修改和完善,形成以职业资格为导向的专业型硕士研究生课程体系,促进专业型硕士研究生教育的发展,不断提高培养质量,以满足社会需求,同时也为本校和其他高校的研究生培养改革提供参考。
语种:
中文
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Numerical investigation on the influence of ventilation shaft on gaseous radionuclide diffusion of uranic exhaust in atmosphere
作者:
Yang, Rong;Zhang, Xiaowen* ;Zhong, Yongming;Ye, Yongjun
期刊:
Indoor and Built Environment ,2019年28(8):1031-1037 ISSN:1420-326X
通讯作者:
Zhang, Xiaowen
作者机构:
[Zhong, Yongming; Yang, Rong; Ye, Yongjun; Zhang, Xiaowen] Univ South China, Sch Environm & Safety Engn, Key Lab Radioact Waste Treatment & Disposal, Hengyang, Peoples R China.;[Zhang, Xiaowen] Univ South China, Key Lab Radioact Waste Treatment & Disposal, Changsheng West Rd 28, Hengyang 421001, Peoples R China.
通讯机构:
[Zhang, Xiaowen] U;Univ South China, Key Lab Radioact Waste Treatment & Disposal, Changsheng West Rd 28, Hengyang 421001, Peoples R China.
关键词:
Uranium mine;Exhaust ventilation shaft;Radionuclide activity;Concentration distribution;Numerical simulation
摘要:
Understanding the distribution of radionuclides from uranium mine tail gas into the surface atmosphere is one way of dealing with radioactive pollution, but the factors affecting the concentration distribution are considered insufficiently studied. This article looks into the structural characteristics of the exhaust shaft of a uranium mine and studied the effect of the cross-sectional shape (square or round) on radionuclide concentrations. We used numerical simulation to verify the significance and clarity of the impact. The results show that, without considering the terrain, the radionuclide concentration distribution is not sensitive to wind direction at different heights, regardless of exhaust shaft shape. There are 2–5 times more radionuclides discharged from the round exhaust shaft as the square shaft, and the difference increases with height. The concentration exceeds the maximum dose requirement until approximately 500 m downwind when the square exhaust shaft is used, while it is at least 1000 m with the round exhaust shaft. These conclusions imply that the structural features of the exhaust shafts, especially the cross-sectional shape, should be given high priority during construction, and the structure of the exhaust shafts should not be neglected or oversimplified in the study of similar problems. © The Author(s) 2018.
语种:
英文
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经口罩过滤后的铀矿尘颗粒物呼吸暴露剂量评价
作者:
叶勇军;吴文浩;李志;尹安松;丁德馨
期刊:
辐射防护 ,2019年39(1):13-18 ISSN:1000-8187
作者机构:
南华大学资源环境与安全工程学院,湖南衡阳421001;南华大学铀矿冶生物技术国防重点学科实验室,湖南衡阳421001;南华大学资源环境与安全工程学院,湖南衡阳,421001;南华大学铀矿冶生物技术国防重点学科实验室,湖南衡阳,421001;[尹安松; 丁德馨; 李志; 叶勇军; 吴文浩] 南华大学
关键词:
铀矿尘;呼吸暴露剂量;风险评价;口罩;铀矿
摘要:
铀矿尘中含有大量的长寿命α放射性核素,其对铀矿井下工人内照射剂量具有不容忽视的贡献。为研究经两种常用口罩过滤后的铀矿尘颗粒物的呼吸暴露风险,本文采用铀矿尘颗粒物的呼吸暴露风险评价模型和经两种常用口罩过滤后的铀矿尘颗粒物的粒径和浓度监测数据,对南方某铀矿井下工人进行了呼吸暴露风险评价,计算了铀矿尘颗粒物的呼吸暴露剂量和暴露风险指数。结果表明: 1)在铀矿井下各典型作业场所中,独头巷道、采场和主风机房是铀矿井下工人所受呼吸暴露剂量较大的主要场所; 2)佩戴纱布口罩和KN95口罩后铀矿尘所致剂量分别为0.14~ 2.01 mSv /a、0.03~ 0.53 mSv /a,佩戴KN95型口罩时的呼吸暴露剂量和暴露风险指数明显低于纱布口罩; 3)当铀品位为0.01%~ 1%,铀矿尘质量浓度为0.01~ 0.2 mg /m~3时,铀矿井下工人所受的铀矿尘颗粒物的呼吸暴露剂量及呼吸暴露风险指数都随铀矿尘质量浓度的增加而增大。
语种:
中文
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Theoretical study of the exhalation of radon from a circular tubular cover layer
作者:
Ye, Y. J.* ;Wu, W. H.;Huang, C. H.
期刊:
Indian Journal of Physics ,2019年93(5):667-672 ISSN:0973-1458
通讯作者:
Ye, Y. J.
作者机构:
[Ye, Y. J.; Wu, W. H.] Univ South China, Sch Environm & Safety Engn, Hengyang 421001, Hunan, Peoples R China.;[Huang, C. H.] Univ South China, Sch Architecture, Hengyang 421001, Hunan, Peoples R China.;[Ye, Y. J.] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China.
通讯机构:
[Ye, Y. J.] U;Univ South China, Sch Environm & Safety Engn, Hengyang 421001, Hunan, Peoples R China.;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China.
关键词:
Radon;Mathematical model;Seepage;Diffusion;Covering layer
摘要:
Radium, which is naturally present in many rocks, decays to the radioactive gas radon, which is exhaled from the surface of underground tunnels and air-raid shelters and is a major source of human exposure to radioactivity. We developed a mathematical model for the migration of radon from a finite-thickness circular tubular emanation medium and a semi-infinite hollow cylindrical emanation medium based on the seepage–diffusion migration theory of radon in porous emanation media. We obtained an analytical solution for the distribution of radon concentration and a formula for the radon exhalation rate under steady-state conditions. When there was no seepage, the radon exhalation rate in the covering layer decreased as the thickness of the covering layer increased and tended toward zero. The radon exhalation rate from the covering layer increased as the radon diffusion coefficient increased. When seepage occurred, the difference in theradon exhalation rate between seepage and non-seepage decreased as the thickness of the covering layer increased. When v > 0, the radon exhalation rate in the covering layer increased as the seepage velocity increased. When v < 0, the radon exhalation rate in the covering layer decreased as the seepage velocity increased. © 2018, Indian Association for the Cultivation of Science.
语种:
英文
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Variation rules of the radon emanation coefficient in dump-leached uranium tailing sand
作者:
Huang, Chun-hua;Li, Shi;Ye, Yong-jun* ;Ding, De-xin;Wu, Wen-hao
期刊:
Journal of Radioanalytical and Nuclear Chemistry ,2019年319(3):1037-1043 ISSN:0236-5731
通讯作者:
Ye, Yong-jun
作者机构:
[Huang, Chun-hua] Univ South China, Sch Architecture, Hengyang 421001, Hunan, Peoples R China.;[Li, Shi; Ye, Yong-jun; Wu, Wen-hao; Ding, De-xin] Univ South China, Sch Environm & Safety Engn, Hengyang 421001, Hunan, Peoples R China.;[Ye, Yong-jun; Ding, De-xin] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China.
通讯机构:
[Ye, Yong-jun] U;Univ South China, Sch Environm & Safety Engn, Hengyang 421001, Hunan, Peoples R China.;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China.
关键词:
radon;uranium;Article;China;dumping;emanation coefficient;environmental parameters;experimental design;humidity;leaching;measurement;mine tailings;particle size;radiation protection;reduction (chemistry);reference value;sand;temperature;uranium mine
摘要:
This study was intended to determine the variation rules of the radon emanation coefficient in dump-leached uranium tailing sand. A temperature and humidity controllable device for measuring the emanation coefficient was designed. Tailing sand with different grain sizes was selected from uranium tailings in southern China. An orthogonal experimental design was conducted to determine the radon emanation coefficient of the sand under different temperatures, humidities and grain sizes. Experimental results showed that the air temperature, humidity and grain size have significant effects on the emanation coefficient. The variation rules regarding the radon emanation coefficient showed significant reference value. © 2019, Akadémiai Kiadó, Budapest, Hungary.
语种:
英文
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Monte Carlo method for determining radon diffusion coefficients in porous media
作者:
Feng, Sheng-yang* ;Wang, Han-qing;Cui, Yu;Ye, Yong-jun;Li, Xiang-yang;...
期刊:
Radiation Measurements ,2019年126:106130 ISSN:1350-4487
通讯作者:
Feng, Sheng-yang
作者机构:
[Cui, Yu; Yang, Rong; Ye, Yong-jun; Feng, Sheng-yang; Li, Xiang-yang] Univ South China, Sch Environm & Safety Engn, Hengyang 421001, Peoples R China.;[Feng, Sheng-yang; Li, Xiang-yang] Hunan Prov Engn Technol Res Ctr Uranium Tailings, Hengyang 421001, Peoples R China.;[Wang, Han-qing; Xie, Dong] Univ South China, Sch Civil Engn, Hengyang 421001, Peoples R China.;[He, Zheng-zhong] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
通讯机构:
[Feng, Sheng-yang] U;Univ South China, Sch Environm & Safety Engn, Hengyang 421001, Peoples R China.
关键词:
Radon diffusion coefficient;Monte Carlo method;Fractal theory;Porous media
摘要:
Radon diffusivity is a key parameter for estimating radon emanation from porous media. We have developed a Monte Carlo method for determining radon diffusion coefficients in porous media. In the proposed method, the probability model for pore diameter derived from fractal theory is used to describe the microscopic pore structure of porous media. The Monte Carlo technique is utilized to search for the pore size that satisfies the probability model for porous media. The convergence rate of the proposed is fast (∼3 min). Radon diffusion coefficients measured by the closed chamber method are used to validate the accuracy of the proposed method. © 2019 Elsevier Ltd
语种:
英文
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安全工程硕士研究生科研创新与实践能力的培养探索
作者:
余修武;叶勇军;蒋复量;郑平卫;冯胜洋
期刊:
大学教育 ,2019年(4):187-189 ISSN:2095-3437
作者机构:
南华大学资源环境与安全工程学院,湖南 衡阳,421001;[郑平卫; 冯胜洋; 余修武; 叶勇军; 蒋复量] 南华大学
关键词:
培养定位;硕士研究生;安全工程;创新与实践
摘要:
目前,我国研究生的培养还存在以下缺陷:综合素质不达标、培养目标制定存在偏差、培养方案实操存在较大缺陷,这些因素对研究生就业与升学造成较大的阻碍。为适应国家对人才结构的调整,培养具有***应用型人才,更好地促进安全工程硕士研究生发展,以安全工程人才培养定位为基础,从课程教学、导师、学术环境、学术团队建设、实践应用等方面对安全工程专业硕士研究生培养模式进行了研究,以切实提高安全工程硕士研究生的培养质量。
语种:
中文
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铀尾矿滩面氡析出率与环境因素的灰色关联度分析
作者:
叶勇军;文汉冠;李向阳;张俊;赵雪丽;...
期刊:
工业安全与环保 ,2018年44(4):96-98,103 ISSN:1001-425X
作者机构:
南华大学环境与安全工程学院 湖南衡阳421001;[文汉冠; 张瑾丰; 张俊; 赵雪丽; 李向阳; 叶勇军] 南华大学
关键词:
灰色关联度分析;正确性;氡析出率;环境指标量
摘要:
通过对衡阳市某铀尾矿滩面的氡析出率、大气温度、大气湿度、气压、γ剂量率、土壤含水率等环境物理量进行监测采集。应用灰色关联度分析法计算分析了其中各因素与氡析出率的关联度,结果发现在分辨系数为0.5的条件下,大气温度、大气湿度、气压、γ剂量率及土壤含水率与氡析出率的关联度分别为0.550 1,0.476 1,0.631 5,0.748 2和0.485 9,其中γ吸收剂量率对氡析出率关联度最大;而大气湿度的关联度最小。结合氡析出率的影响因素具有多重性的特点,试验研究成果可为以后探索氡析出率与各环境指标量的数学关系提供重要参考。
语种:
中文
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铀矿排风井周边地表大气氡致辐射效应的数值模拟
作者:
叶勇军;李实;黄春华;丁德馨;钟永明;...
期刊:
南华大学学报(自然科学版) ,2018年32(1):1-9 ISSN:1673-0062
作者机构:
南华大学 环境与安全工程学院,湖南 衡阳421001;南华大学 铀矿冶生物技术国防重点学科实验室,湖南 衡阳421001;南华大学 环境与安全工程学院,湖南 衡阳,421001;南华大学 土木工程学院,湖南 衡阳,421001;南华大学 铀矿冶生物技术国防重点学科实验室,湖南 衡阳,421001
关键词:
高斯烟羽模型;铀矿排风井;氡浓度;公众个人剂量
摘要:
为了指导铀矿排风井周边地表环境的辐射防护设计,基于放射性气态流出物大气扩散的高斯烟羽模型,建立了铀矿排风井周边地表年均氡浓度以及公众个人年有效剂量的数学计算模型,研究了排风井气态流出物初始氡浓度、排风风量和源强对排风井周边地表1 km范围内年均氡浓度以及公众个人年有效剂量分布的影响.结果表明,在其他参数不变的情况下,年均氡浓度和公众个人年有效剂量的最大值随气态流出物初始氡浓度的增加而增大,随排风风量的增加而减小;最大值离井口的距离和氡致辐射的影响范围随初始氡浓度的增加而增大,随排风风量的增加而减小;相同源强下,最大值随气态流出物的初始氡浓度增加而增大,随排风风量的增大而减小;最大值离井口的距离随排风风量的增加而增大.最后,根据所得结论提出铀矿排风井周边的辐射防护建议.
语种:
中文
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地下铀矿山留矿法采场受限空间内氡迁移的数值模拟
作者:
叶勇军;苏杭;丁德馨;雷波;冯胜洋;...
期刊:
安全与环境学报 ,2018年18(1):217-223 ISSN:1009-6094
作者机构:
南华大学环境与安全工程学院, 湖南, 衡阳, 421001;南华大学, 铀矿冶生物技术国防重点学科实验室, 湖南, 衡阳, 421001;[叶勇军] 南华大学环境与安全工程学院, 湖南, 衡阳, 421001 南华大学, 铀矿冶生物技术国防重点学科实验室, 湖南, 衡阳, 421001;[苏杭; 雷波; 冯胜洋; 梁涛; 张运锋] 南华大学环境与安全工程学院, 湖南, 衡阳, 421001;[丁德馨] 南华大学, 铀矿冶生物技术国防重点学科实验室, 湖南, 衡阳, 421001
关键词:
安全工程;留矿法;氡浓度;颗粒堆积型;数值模拟;通风条件
摘要:
为研究铀矿山留矿法采场氡迁移规律,依据留矿法采场的构造和物理几何尺寸,建立了受限空间内颗粒堆积型射气介质气体流动的数学模型和氡迁移方程,以10 m和20 m高爆破矿堆为对象,采用计算流体力学(CFD)方法,研究了不同通风条件下采场中氡的迁移规律。结果表明:1)采场下行通风方式降低矿堆上部作业空间氡浓度的效果优于上行通风方式,但对采场运输巷道氡浓度的效果相反;采场排风氡浓度与采场通风风量成反比,氡析出份额与通风风量成正比;2)在相同通风风量下,10 m高爆破矿堆与20 m高爆破矿堆氡析出份额之差随通风风流量增长而逐渐缩小;3)均压通风对渗透率高(k=1×10~(-8) m~2)的采场排风氡浓度、矿堆氡析出份额有明显影响。
语种:
中文
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“科教融合、校企合作”双翼模式下的人才培养初探--以安全工程为例
作者:
余修武;叶勇军;蒋复量;郭倩;李向阳;...
期刊:
高教学刊 ,2018年(1):10-12 ISSN:2096-000X
作者机构:
南华大学 环境与安全工程学院,湖南 衡阳,421001;[汪弘; 雷林; 郭倩; 余修武; 李向阳; 叶勇军; 蒋复量] 南华大学
关键词:
安全工程;教学模式;人才培养;创新实践能力
摘要:
在分析安全工程专业教学现状和问题的基础上, 针对大学生在科研能力与应用能力方面的欠缺, 从教学模式入手, 以科教融合与校企合作作为创新实践人才培养的途径, 加强学生的创新和实践能力为目标, 来提高安全工程专业人才培养的质量.
语种:
中文
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Simultaneous determination of the radon diffusion coefficient and the free radon production rate from compact porous emanation media
作者:
Ye, Yong-jun* ;Wu, Wen-hao;Feng, Sheng-yang;Huang, Chun-huang;Li, Shi
期刊:
Building and Environment ,2018年144:66-71 ISSN:0360-1323
通讯作者:
Ye, Yong-jun
作者机构:
[Li, Shi; Ye, Yong-jun; Wu, Wen-hao; Feng, Sheng-yang] Univ South China, Sch Environm & Safety Engn, Hengyang 421001, Hunan, Peoples R China.;[Huang, Chun-huang] Univ South China, Sch Civil Engn, Hengyang 421001, Hunan, Peoples R China.;[Ye, Yong-jun] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China.
通讯机构:
[Ye, Yong-jun] U;Univ South China, Sch Environm & Safety Engn, Hengyang 421001, Hunan, Peoples R China.
关键词:
Compact porous emanation media;Diffusion coefficient;Production rate;Radon
摘要:
The radon diffusion coefficient and the free radon production rate are important parameters for used to describe the migration of radon in porous emanation media. However, the method currently used to determine these two parameters is complicated. Based on a theory of the radon exhalation by diffusion from the inner and outer surfaces of a circular tube, a method to determine these two parameters in compact porous emanation media was proposed, and an experimental measuring device was designed and manufactured. The experimental device was used to simultaneously measure the radon exhalation rate from the inner and outer surfaces of a quarter-circular tubular concrete block filled with fine-grained uranium tailing sand. The measurements were used to calculate the radon diffusion coefficient and the free radon production rate. The result obtained by using this method shows that accuracy was within the accepted range of experimental error. This method has practical value for the simultaneous determination of the radon diffusion coefficient and the free radon production rate from compact porous emanation media.
语种:
英文
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基于进化多项式回归方法的土体本构关系
作者:
冯胜洋;魏丽敏;李向阳;蒋复量;叶勇军;...
期刊:
应用力学学报 ,2018年35(1):86-92 ISSN:1000-4939
作者机构:
南华大学环境保护与安全工程学院, 衡阳, 421001;金属矿山安全与健康国家重点实验室, 金属矿山安全与健康国家重点实验室, 马鞍山, 243000;中南大学土木工程学院, 长沙, 410075;[冯胜洋] 南华大学环境保护与安全工程学院, 衡阳, 421001 金属矿山安全与健康国家重点实验室, 金属矿山安全与健康国家重点实验室, 马鞍山, 243000;[魏丽敏] 中南大学土木工程学院, 长沙, 410075
关键词:
土体本构关系;进化多项式回归方法;数据挖掘;二次开发
摘要:
进化多项式回归方法是近几年来在国际上引起广泛关注的一种新颖的数据挖掘方法。本文在土样固结排水试验数据的基础上,首次使用该方法建立了土体本构关系。采用上海嘉定区某地软土的固结排水试验结果对模型进行了验证。结果表明,该本构关系能够更精确地描述土体的应力-应变特性,其预测精度比修正剑桥模型高19.6%-57.7%。另外,本文还用切线刚度法,对基于进化多项式回归方法的土体本构关系进行了ABAQUS二次开发,对软土固结排水试验进行了有限元数值模拟。
语种:
中文
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Transformation of uranium species in soil during redox oscillations
作者:
Fu, Haiying;Zhang, Hui;Sui, Yang;Hu, Nan;Ding, Dexin* ;...
期刊:
Chemosphere ,2018年208(Oct.):846-853 ISSN:0045-6535
通讯作者:
Ding, Dexin
作者机构:
[Ding, Dexin; Zhang, Hui; Ye, Yongjun; Li, Guangyue; Dai, Zhongran; Hu, Nan; Wang, Yongdong; Fu, Haiying] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.;[Ding, Dexin; Ye, Yongjun; Sui, Yang; Fu, Haiying] Univ South China, Sch Environm & Safety Engn, Hengyang 421001, Hunan, Peoples R China.;[Sui, Yang] Hunan Taohuajiang Nucl Power Co Ltd, Yiyang 413000, Peoples R China.
通讯机构:
[Ding, Dexin] U;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.
关键词:
Redox cycling;Uranium speciation;Stable U(IV);Chemical extraction;Paddy soil
摘要:
Redox oscillation is commonly found in near-surface environment, where soils are often polluted with many redox active contaminants, including uranium (U). In order to investigate the transformation of U species in near-surface soil under redox oscillations conditions, redox oscillations and reduction experiments were performed, biogeochemical parameters and native microbial community composition were monitored, main elements on the surface of solid-phase were analyzed by XPS, and labile U(IV) species and stable U(IV) species in solid-phase were provisionally defined using an anoxic 1 M sodium bicarbonate extraction. It was found that redox oscillations slightly increased the water-soluble U but significantly increased the stable U(IV) species (P < 0.05) in soil. In reduction experiment, there was upper limit value for percentage of stable U(IV) species, and the labile U(IV) species could not transform to stable U(IV) species in a short period of time under reduction conditions. The redox transition of Fe enriched on the surface of soil and the conversion of microbial community composition played a major role in speciation transformation of U under redox oscillations conditions. In addition, sequential extraction revealed that the increase of stable U(IV) species content reflected the U speciation transition from acetate extract to more recalcitrant hydroxylamine extract. The finding provides a potential method for improving the stability of U when bio-reduction is used to remediate the U-contaminated soils. (C) 2018 Elsevier Ltd. All rights reserved.
语种:
英文
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安全工程专业本科生创新实践能力培养的探索与实践
作者:
余修武;李向阳;叶勇军;蒋复量;郭倩
期刊:
创新与创业教育 ,2018年9(4):93-96 ISSN:1674-893X
作者机构:
南华大学环境与安全工程学院,湖南衡阳,421001;[郭倩; 余修武; 叶勇军; 李向阳; 蒋复量] 南华大学
关键词:
创新实践;本科教育;安全工程
摘要:
安全工程专业具有知识交叉性、注重理论践行、需要创新实践能力等特点。积极探索具有创新实践能力的安全专业人才培养,从提升师资队伍水平、设计教学模式、强化学生科研训练和实践应用等方面入手,以科学研究融入教学为途径,以行业发展需求为指引,进一步加强对安全工程专业学生创新意识和应用能力建设的重视。
语种:
中文
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WSN铀尾矿库核污染监测GAF交圆改进型路由
作者:
余修武;张枫;范飞生;周利兴;叶勇军;...
期刊:
电子科技大学学报 ,2017年46(6):825-829 and 840 ISSN:1001-0548
作者机构:
[余修武; 张枫; 范飞生; 周利兴; 叶勇军; 郭倩] Environmental Protection and Safety Engineering Institute, University of South China, Hengyang;Hunan;421001, China;[余修武; 张枫; 范飞生; 周利兴; 叶勇军; 郭倩] Hunan;[余修武; 张枫; 范飞生; 周利兴; 叶勇军; 郭倩] 421001, China
关键词:
节点能耗;路由算法;铀尾矿库;无线传感器网络
摘要:
在对铀尾矿库进行监测时,无线传感器优于传统的有线布置,但由于能量受限,在路由传输中必须高效地使用能量。该文在分析LEACH和GAF算法的基础上,提出了一种基于GAF交圆结构的改进型路由算法(IC-GAF)。利用节点地理位置信息与相交圆的结构模型来划分虚拟圆,在虚拟圆内根据剩余能量和节点与中心的距离来选举簇头,簇头从下一接收簇头或中转节点中选择最优的下一跳节点传输数据,最终将数据传输到基站。仿真表明,IC-GAF能有效的降低节点能耗,延长网络寿命。
语种:
中文
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从低品位铀尾矿中氧化浸出铀
作者:
李密;张彪;张晓文;黄婧;丁德馨;...
期刊:
中国有色金属学报 ,2017年27(1):145-154 ISSN:1004-0609
通讯作者:
Ding, De-Xin(dingdxzzz@163.com)
作者机构:
[张晓文; 李密; 张彪; 黄婧] School of Environment Protection and Safety Engineering, University of South China, Hengyang, 421001, China;[张晓文; 李密] Key Laboratory of Radioactive Waste Treatment and Disposal, University of South China, Hengyang, 421001, China;[丁德馨; 叶勇军] Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, 421001, China
通讯机构:
Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, China
关键词:
铀尾矿;浸出;氧化;脉石
摘要:
针对低品位铀尾矿因脉石含量高、物相赋存状态复杂而造成的铀浸出率低的问题,提出添加辅助氧化剂破坏脉石结构而实现强化浸出铀的思路。采用单因素实验法对比常规酸浸和3种氧化剂(H_2O_2、MnO_2和Fe~(3+))强化酸浸对铀浸出率的影响。结果表明:当浸出温度、硫酸浓度和液固比分别为30 ℃、1 mol/L和20:1时,采用常规酸浸6 h后铀的浸出率仅为78%,而在相同的浸出条件下,强化酸浸1.5 h铀的浸出率可达到95%。浸出渣的XRD及SEM-EDS分析结果表明,H_2O_2及MnO_2均能破坏脉石晶体结构,减少颗粒团聚,但添加MnO_2后生成新的硅酸锰盐晶体,Fe~(3+)不能破坏脉石结构,但其氧化作用在一定程度上能加快铀的浸出。
语种:
中文
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通风条件下留矿法采场氡迁移试验研究
作者:
叶勇军;苏杭;丁德馨;余修武;钟永明;...
期刊:
中国安全科学学报 ,2017年27(8):144-149 ISSN:1003-3033
作者机构:
南华大学环境与安全工程学院, 湖南, 衡阳, 421001;南华大学, 铀矿冶生物技术国防重点学科实验室, 湖南, 衡阳, 421001;[叶勇军; 苏杭; 余修武; 钟永明; 梁涛] 南华大学环境与安全工程学院, 湖南, 衡阳, 421001;[丁德馨] 南华大学, 铀矿冶生物技术国防重点学科实验室, 湖南, 衡阳, 421001
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
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。
语种:
中文
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A model of calculating radon and its daughters' concentrations in the chamber stope of underground uranium mines
作者:
Ye, Yong-jun* ;Dai, Xin-tao;Ding, De-xin
作者机构:
[Ye, Yong-jun; Ding, De-xin] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang, Hunan, Peoples R China.;[Dai, Xin-tao; Ye, Yong-jun] Univ South China, Sch Environm Protect & Safety Engn, Hengyang, Hunan, Peoples R China.
会议名称:
第二届能源、环境与材料科学国际学术会议(EEMS 2016)
会议时间:
2016-07-29
会议地点:
新加坡
会议主办单位:
[Ye, Yong-jun;Ding, De-xin] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang, Hunan, Peoples R China.^[Ye, Yong-jun;Dai, Xin-tao] Univ South China, Sch Environm Protect & Safety Engn, Hengyang, Hunan, Peoples R China.
摘要:
In underground uranium mines of China, there are many chamber stopes that can generate and accumulate radon and its daughters, the concentrations of which are about 3-5 times higher than other countries. Therefore, it is very urgent to improve the level of radiation protection of the chamber stopes in China. Ventilation is one of the effective ways to control the concentrations of radon and its daughters. First, this study established the mathematical models that calculated the concentration of radon and its daughters in the chamber stope for designing and optimizing ventilation systems by using the theories of turbulent mass transfer and radioactive decay. Second, the models were used to analyze radon and its daughters' concentrations with the change of airflow rate, air volume, and radon generation rate in chamber stope. Third, the ventilation conditions of chamber stopes of four typical uranium mines in China were investigated and the models to calculate radon and its daughters' concentrations were used to verify its accuracy. Finally, the difference is analyzed between the measured values and the theoretical values of the total Potential Alpha Energy Concentration (PAEC) of radon daughters and a linear correction formula was established.
语种:
英文
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