Pub Date : 2020-04-28DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.04.008
Chen Liuyu, Liang Xijian, B. Juan, Hu Youjin, Wei Zeyun
In order to evaluate coal ̄gas outburst induced by rock burst more reasonablyꎬ grading criteria of coal ̄gas outburst indicators were studied from three aspects of in ̄situ stress conditionsꎬ coal seam gasꎬ and physical and mechanical properties of coal by using index critical value and classification number method. Thenꎬ a grading evaluation model of outburst tendency was established based on AHP and TOPSIS. Finallyꎬ its rationality was verified through actual engineering cases. The study show that the 中 国 安 全 科 学 学 报 China Safety Science Journal 第30卷 2020年 prediction result of proposed model is medium riskꎬ consistent with actual cases. In ̄situ stress is a major reason for occurrence of rock bursting with coal ̄gasꎬ followed by gas factor and physical and mechanical properties of coal have the least impact. Specificallyꎬ coal structureꎬ gas pressureꎬ gas dynamic phenomenonꎬ coal damage type and coal solidity coefficient have a greater impact on such outburst.
{"title":"Prediction of coal-gas outburst induced by rock-burst tendency based on AHP-TOPSIS","authors":"Chen Liuyu, Liang Xijian, B. Juan, Hu Youjin, Wei Zeyun","doi":"10.16265/J.CNKI.ISSN1003-3033.2020.04.008","DOIUrl":"https://doi.org/10.16265/J.CNKI.ISSN1003-3033.2020.04.008","url":null,"abstract":"In order to evaluate coal ̄gas outburst induced by rock burst more reasonablyꎬ grading criteria of coal ̄gas outburst indicators were studied from three aspects of in ̄situ stress conditionsꎬ coal seam gasꎬ and physical and mechanical properties of coal by using index critical value and classification number method. Thenꎬ a grading evaluation model of outburst tendency was established based on AHP and TOPSIS. Finallyꎬ its rationality was verified through actual engineering cases. The study show that the 中 国 安 全 科 学 学 报 China Safety Science Journal 第30卷 2020年 prediction result of proposed model is medium riskꎬ consistent with actual cases. In ̄situ stress is a major reason for occurrence of rock bursting with coal ̄gasꎬ followed by gas factor and physical and mechanical properties of coal have the least impact. Specificallyꎬ coal structureꎬ gas pressureꎬ gas dynamic phenomenonꎬ coal damage type and coal solidity coefficient have a greater impact on such outburst.","PeriodicalId":9976,"journal":{"name":"中国安全科学学报","volume":"142 1","pages":"47"},"PeriodicalIF":0.0,"publicationDate":"2020-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87971859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-04-28DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.04.024
Luo Haoshun, Xu Liangjie, D. Zhigang, Zeng Huan
In order to ensure traffic safety in long urban tunnels and to improve traffic efficiencyꎬ visual environment characteristics of these tunnels with multiple off ̄ramps were analyzedꎬ and a stereoscopic guiding visual reference system was constructed based on visual illusion mechanism and color psychology principles. Thenꎬ an experiment of drivers ' psychophysics perception was carried out by using E ̄prime software to study the system's effect on improving traffic safety in long urban tunnels and its optimized design. The results show that drivers are most comfortable with blue and green information while yellow has a strong warning effect but causes no sharp stimulusꎬ which enhances driving attention. The reference system effectively shortens drivers' visual recognition time of guiding information and increases recognition distance. In additionꎬ rhythm designs are moderately inclined to the entrance and the exit in order to induce drivers to have reasonable slope illusion. When it is 75° inclinedꎬ drivers can achieve best speed 第 4 期 罗浩顺等: 城市长隧道导向视觉参照系安全改善效果研究 control on tunnel slopes.
{"title":"Safety improvement effect of guiding visual reference system in long urban tunnels","authors":"Luo Haoshun, Xu Liangjie, D. Zhigang, Zeng Huan","doi":"10.16265/J.CNKI.ISSN1003-3033.2020.04.024","DOIUrl":"https://doi.org/10.16265/J.CNKI.ISSN1003-3033.2020.04.024","url":null,"abstract":"In order to ensure traffic safety in long urban tunnels and to improve traffic efficiencyꎬ visual environment characteristics of these tunnels with multiple off ̄ramps were analyzedꎬ and a stereoscopic guiding visual reference system was constructed based on visual illusion mechanism and color psychology principles. Thenꎬ an experiment of drivers ' psychophysics perception was carried out by using E ̄prime software to study the system's effect on improving traffic safety in long urban tunnels and its optimized design. The results show that drivers are most comfortable with blue and green information while yellow has a strong warning effect but causes no sharp stimulusꎬ which enhances driving attention. The reference system effectively shortens drivers' visual recognition time of guiding information and increases recognition distance. In additionꎬ rhythm designs are moderately inclined to the entrance and the exit in order to induce drivers to have reasonable slope illusion. When it is 75° inclinedꎬ drivers can achieve best speed 第 4 期 罗浩顺等: 城市长隧道导向视觉参照系安全改善效果研究 control on tunnel slopes.","PeriodicalId":9976,"journal":{"name":"中国安全科学学报","volume":"41 1","pages":"154"},"PeriodicalIF":0.0,"publicationDate":"2020-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78981913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-04-28DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.04.028
Liao Bin, Feng Haiqin, W. Xin, Duan Qionghua
{"title":"Influence and work mechanism of framing strategies on effectiveness of safety slogans","authors":"Liao Bin, Feng Haiqin, W. Xin, Duan Qionghua","doi":"10.16265/J.CNKI.ISSN1003-3033.2020.04.028","DOIUrl":"https://doi.org/10.16265/J.CNKI.ISSN1003-3033.2020.04.028","url":null,"abstract":"","PeriodicalId":9976,"journal":{"name":"中国安全科学学报","volume":"88 1","pages":"179"},"PeriodicalIF":0.0,"publicationDate":"2020-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84140503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-04-28DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.04.025
WU Ligong, Xiao Lixing, L. Xiaofeng, Yao Chi, Jiang Qinghui, Zhou Chuangbing
In order to explore overtopping break reactions of dam constructed by tailings of different particle sizesꎬ with tailings of Yancang tailings pond in Yongping Copper Mine used as dam materialꎬ physical dam ̄ break test was carried out with medium sandꎬ fine sand and silt. Thenꎬ numerical simulation was conducted for verification by using FLOW software. The results show that when middle sand is usedꎬ dam collapse is mainly represented by surface scouring and displacement failure while being represented majorly by downward erosive when silt is usedꎬ and is both of them in the case of fine sand. The physical test and numerical simulation achieve good consistency in terms of dam break flow and timeꎬ etc.ꎬ which indicates reliability of the method combining both test and numerical calculation in simulating tailings dam break.
{"title":"Influence of particle size on overtopping dam break of tailings dam","authors":"WU Ligong, Xiao Lixing, L. Xiaofeng, Yao Chi, Jiang Qinghui, Zhou Chuangbing","doi":"10.16265/J.CNKI.ISSN1003-3033.2020.04.025","DOIUrl":"https://doi.org/10.16265/J.CNKI.ISSN1003-3033.2020.04.025","url":null,"abstract":"In order to explore overtopping break reactions of dam constructed by tailings of different particle sizesꎬ with tailings of Yancang tailings pond in Yongping Copper Mine used as dam materialꎬ physical dam ̄ break test was carried out with medium sandꎬ fine sand and silt. Thenꎬ numerical simulation was conducted for verification by using FLOW software. The results show that when middle sand is usedꎬ dam collapse is mainly represented by surface scouring and displacement failure while being represented majorly by downward erosive when silt is usedꎬ and is both of them in the case of fine sand. The physical test and numerical simulation achieve good consistency in terms of dam break flow and timeꎬ etc.ꎬ which indicates reliability of the method combining both test and numerical calculation in simulating tailings dam break.","PeriodicalId":9976,"journal":{"name":"中国安全科学学报","volume":"98 1","pages":"160"},"PeriodicalIF":0.0,"publicationDate":"2020-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84852797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-04-28DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.04.026
Tian Shui-cheng, Zhou Runkang, Yang Jie
In order to reduce firefighters' heat stress and improve fire rescue efficiencyꎬ effects of cooling garments on thermoregulation of firefighters were investigated. Three categories of garments were set under high temperature (35 °C)ꎬ including basic clothing (short sleeves and shorts)ꎬ protective clothing (basic clothing and protective clothing)ꎬ and cooling garmments (basic clothingꎬ protective clothing and cooling garmments)ꎬ and typical thermal responses of participants during exercise and rest phases were measured for these cases respectively. The results show that protective clothingꎬ compared to basic oneꎬ leads to a significant increase in skin temperatureꎬ core temperatureꎬ heart rate and sweating rateꎬ and a decline in sweat evaporation rate. Cooling garmments can effectively attenuate above ̄mentioned increasesꎬ and also further reduce sweat evaporation rate. Their cooling effects decrease over time and almost disappear after 40 minutes of workꎬ or they may even increase thermal and physiological burden of firefighters.
{"title":"Effects of cooling garments on firefighters' thermal responses under high temperature","authors":"Tian Shui-cheng, Zhou Runkang, Yang Jie","doi":"10.16265/J.CNKI.ISSN1003-3033.2020.04.026","DOIUrl":"https://doi.org/10.16265/J.CNKI.ISSN1003-3033.2020.04.026","url":null,"abstract":"In order to reduce firefighters' heat stress and improve fire rescue efficiencyꎬ effects of cooling garments on thermoregulation of firefighters were investigated. Three categories of garments were set under high temperature (35 °C)ꎬ including basic clothing (short sleeves and shorts)ꎬ protective clothing (basic clothing and protective clothing)ꎬ and cooling garmments (basic clothingꎬ protective clothing and cooling garmments)ꎬ and typical thermal responses of participants during exercise and rest phases were measured for these cases respectively. The results show that protective clothingꎬ compared to basic oneꎬ leads to a significant increase in skin temperatureꎬ core temperatureꎬ heart rate and sweating rateꎬ and a decline in sweat evaporation rate. Cooling garmments can effectively attenuate above ̄mentioned increasesꎬ and also further reduce sweat evaporation rate. Their cooling effects decrease over time and almost disappear after 40 minutes of workꎬ or they may even increase thermal and physiological burden of firefighters.","PeriodicalId":9976,"journal":{"name":"中国安全科学学报","volume":"1 1","pages":"166"},"PeriodicalIF":0.0,"publicationDate":"2020-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78509548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-04-28DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.04.021
Zhang Yi, Ma Jian, Luo Qian, Lin Peng
In order to quantify influence of walking height on motion features of evacueesꎬ VR technology was adopted to construct evacuation scenarios of different heights. Thenꎬ experiment data were collected with laser radarꎬ and fear of height was classified by using acrophobia questionnaire (AQ) and K ̄means clustering algorithm. Finallyꎬ influence of different levels of acrophobia and gender on evacuees' speedꎬ stride and step frequency were investigated at controlled height. The results show that evacuation speedꎬ stride and step frequency of pedestrians decrease along with the increase of heightꎬ which is more obvious as it is between 0 m and 50 m. When at the same heightꎬ those whose acrophobia is more severe will have lower speedꎬ smaller strideꎬ faster step frequency and are more sensitive to height changes. It is also found that female's walking speed and stride decrease more observably than those of males while the latter ' s walking speed and stride are larger than females at the same height.
{"title":"Influence of walking height on motion features of evacuees","authors":"Zhang Yi, Ma Jian, Luo Qian, Lin Peng","doi":"10.16265/J.CNKI.ISSN1003-3033.2020.04.021","DOIUrl":"https://doi.org/10.16265/J.CNKI.ISSN1003-3033.2020.04.021","url":null,"abstract":"In order to quantify influence of walking height on motion features of evacueesꎬ VR technology was adopted to construct evacuation scenarios of different heights. Thenꎬ experiment data were collected with laser radarꎬ and fear of height was classified by using acrophobia questionnaire (AQ) and K ̄means clustering algorithm. Finallyꎬ influence of different levels of acrophobia and gender on evacuees' speedꎬ stride and step frequency were investigated at controlled height. The results show that evacuation speedꎬ stride and step frequency of pedestrians decrease along with the increase of heightꎬ which is more obvious as it is between 0 m and 50 m. When at the same heightꎬ those whose acrophobia is more severe will have lower speedꎬ smaller strideꎬ faster step frequency and are more sensitive to height changes. It is also found that female's walking speed and stride decrease more observably than those of males while the latter ' s walking speed and stride are larger than females at the same height.","PeriodicalId":9976,"journal":{"name":"中国安全科学学报","volume":"1 1","pages":"135"},"PeriodicalIF":0.0,"publicationDate":"2020-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82427750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-04-28DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.04.023
Jin Kaiyan, Li Zhisheng, Li Tao
Buoyancy frequency methodꎬ N percentage methodꎬ integral ratio methodꎬ are three common methods to determine smoke layer height in tunnel fireꎬ the calculations of three methods are often biased from visual observations. In order to study and explain deviations of calculation results from visual observationsꎬ which were found in three common determination methods of smoke layer height in tunnel fireꎬ a long tunnel model was established based on FDSꎬ and six types of fire source power were set. Thenꎬ vertical visibility distribution was used to verify deviation between existing determination method and visual results before visibility mutation method was proposed. The results show that the deviation calculated from above four methods ranks as visibility mutation method (1 63%) < buoyancy frequency method (4 88%) < N percentage method (N= 30ꎬ 7 88%) < integral ratio method (8 50%)ꎬ among which results of integral ratio and buoyancy frequency method are higher than visual ones. It is also found that visibility value in vertical direction of tunnel remains constant and then decreases abruptly as the height increasesꎬ and the greater fire power isꎬ the faster it declinesꎬ and the lower visibility value there is.
{"title":"Determination method of smoke layer height in road tunnel fire","authors":"Jin Kaiyan, Li Zhisheng, Li Tao","doi":"10.16265/J.CNKI.ISSN1003-3033.2020.04.023","DOIUrl":"https://doi.org/10.16265/J.CNKI.ISSN1003-3033.2020.04.023","url":null,"abstract":"Buoyancy frequency methodꎬ N percentage methodꎬ integral ratio methodꎬ are three common methods to determine smoke layer height in tunnel fireꎬ the calculations of three methods are often biased from visual observations. In order to study and explain deviations of calculation results from visual observationsꎬ which were found in three common determination methods of smoke layer height in tunnel fireꎬ a long tunnel model was established based on FDSꎬ and six types of fire source power were set. Thenꎬ vertical visibility distribution was used to verify deviation between existing determination method and visual results before visibility mutation method was proposed. The results show that the deviation calculated from above four methods ranks as visibility mutation method (1 63%) < buoyancy frequency method (4 88%) < N percentage method (N= 30ꎬ 7 88%) < integral ratio method (8 50%)ꎬ among which results of integral ratio and buoyancy frequency method are higher than visual ones. It is also found that visibility value in vertical direction of tunnel remains constant and then decreases abruptly as the height increasesꎬ and the greater fire power isꎬ the faster it declinesꎬ and the lower visibility value there is.","PeriodicalId":9976,"journal":{"name":"中国安全科学学报","volume":"11 1","pages":"147"},"PeriodicalIF":0.0,"publicationDate":"2020-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83380867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-04-28DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.04.027
XU Surui
In order to prevent coal mine roofꎬ gas explosionꎬ coal and gas outburst and water damage accidentsꎬ the unsafe acts of 100 coal mine accidents were analyzed by 2 4 Modelꎬ then the risk assessment model of coal miners' unsafe behavior based on Monte Carlo method was established. The risk value of accident behavior and the influence degree of unsafe acts on behavioral risks in each type of accident are studiedꎬ and accident prevention measures based on individual behavior level are proposed. The results shows that the risk of gas explosion accidents is the biggestꎬ followed by coal and gas outburstꎬ water damageꎬ and roof accidents. In additionꎬ three kinds of unsafe acts have a great impact on the risk of coal mine accident behaviorꎬ including " not effective water exploration" ꎬ " violation of regulations in construction and production" and " giving instructions against rules and regulations" .
{"title":"Risk assessment on unsafe behavior of coal miner based on Monte Carlo method","authors":"XU Surui","doi":"10.16265/J.CNKI.ISSN1003-3033.2020.04.027","DOIUrl":"https://doi.org/10.16265/J.CNKI.ISSN1003-3033.2020.04.027","url":null,"abstract":"In order to prevent coal mine roofꎬ gas explosionꎬ coal and gas outburst and water damage accidentsꎬ the unsafe acts of 100 coal mine accidents were analyzed by 2 4 Modelꎬ then the risk assessment model of coal miners' unsafe behavior based on Monte Carlo method was established. The risk value of accident behavior and the influence degree of unsafe acts on behavioral risks in each type of accident are studiedꎬ and accident prevention measures based on individual behavior level are proposed. The results shows that the risk of gas explosion accidents is the biggestꎬ followed by coal and gas outburstꎬ water damageꎬ and roof accidents. In additionꎬ three kinds of unsafe acts have a great impact on the risk of coal mine accident behaviorꎬ including \" not effective water exploration\" ꎬ \" violation of regulations in construction and production\" and \" giving instructions against rules and regulations\" .","PeriodicalId":9976,"journal":{"name":"中国安全科学学报","volume":"1 1","pages":"172"},"PeriodicalIF":0.0,"publicationDate":"2020-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86709389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-03-28DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.03.023
Zhang Zhenjiang, Zhang Yuzhao, W. Xiaorong
In order to ensure operation stability of railway express freight transport in the face of emergenciesꎬ theories of complex network and robust optimization are used to study topological characteristics and robustness of REFN. Firstlyꎬ statistical parameters of network characteristics were calculated and topological characteristics of REFN were analyzed. Thenꎬ important nodes were evaluated before a comprehensive evaluation index was established based on route gradeꎬ degree value and betweenness. Lastlyꎬ robustness evaluation index under different attack modes was calculated and REFN robustness with or without cascading failure was compared and analyzed. The results show that in contrast to traditional evaluation index of node importance for complex networksꎬ important nodes calculated based on route grade have a greater impact on network robustness. REFN is robust under random attacksꎬ but shows greater vulnerability under intentional attacksꎬ and even more prominent vulnerability when there is cascading failure.
{"title":"Robustness analysis of railway express freight network","authors":"Zhang Zhenjiang, Zhang Yuzhao, W. Xiaorong","doi":"10.16265/J.CNKI.ISSN1003-3033.2020.03.023","DOIUrl":"https://doi.org/10.16265/J.CNKI.ISSN1003-3033.2020.03.023","url":null,"abstract":"In order to ensure operation stability of railway express freight transport in the face of emergenciesꎬ theories of complex network and robust optimization are used to study topological characteristics and robustness of REFN. Firstlyꎬ statistical parameters of network characteristics were calculated and topological characteristics of REFN were analyzed. Thenꎬ important nodes were evaluated before a comprehensive evaluation index was established based on route gradeꎬ degree value and betweenness. Lastlyꎬ robustness evaluation index under different attack modes was calculated and REFN robustness with or without cascading failure was compared and analyzed. The results show that in contrast to traditional evaluation index of node importance for complex networksꎬ important nodes calculated based on route grade have a greater impact on network robustness. REFN is robust under random attacksꎬ but shows greater vulnerability under intentional attacksꎬ and even more prominent vulnerability when there is cascading failure.","PeriodicalId":9976,"journal":{"name":"中国安全科学学报","volume":"51 1","pages":"150"},"PeriodicalIF":0.0,"publicationDate":"2020-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77409913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-03-28DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.03.026
Liu Yan, Liu Yong, Xu Zhenghua, Hong ChangshouZHANG Qiucai, Yuan Jinfan
In order to study variation characteristics of radon control performance of unsaturated covering soil on uranium tailings beach under long time high temperatureꎬ with uranium tailings pond as study subjectꎬ simulation experiments were carried out by using a self ̄made experimental device of radon exhalation from covering soil on the beach. Thenꎬ relationships between water contentꎬ degree of surface fissure development and radon exhalation rate of covering soil were studied with samples of tailing sand at a depth of 1 5 m from a uranium tailings pond in south China. The results show that the change of radon exhalation rate is divided into four stagesꎬ linear growthꎬ linear declineꎬ " step" growth and tending to 中 国 安 全 科 学 学 报 China Safety Science Journal 第30卷 2020年 stability. It increases with the increase of fracture rate of covering soilꎬ and tend to be steady when shrinkage limit is reached and crack no longer develops. Moreoverꎬ the greater fractal dimension of cracks isꎬ the more obvious soil cracking isꎬ and the greater radon exhalation rate will be.
{"title":"Research on radon control performance of covering soil in uranium tailings reservoir under long time high temperature","authors":"Liu Yan, Liu Yong, Xu Zhenghua, Hong ChangshouZHANG Qiucai, Yuan Jinfan","doi":"10.16265/J.CNKI.ISSN1003-3033.2020.03.026","DOIUrl":"https://doi.org/10.16265/J.CNKI.ISSN1003-3033.2020.03.026","url":null,"abstract":"In order to study variation characteristics of radon control performance of unsaturated covering soil on uranium tailings beach under long time high temperatureꎬ with uranium tailings pond as study subjectꎬ simulation experiments were carried out by using a self ̄made experimental device of radon exhalation from covering soil on the beach. Thenꎬ relationships between water contentꎬ degree of surface fissure development and radon exhalation rate of covering soil were studied with samples of tailing sand at a depth of 1 5 m from a uranium tailings pond in south China. The results show that the change of radon exhalation rate is divided into four stagesꎬ linear growthꎬ linear declineꎬ \" step\" growth and tending to 中 国 安 全 科 学 学 报 China Safety Science Journal 第30卷 2020年 stability. It increases with the increase of fracture rate of covering soilꎬ and tend to be steady when shrinkage limit is reached and crack no longer develops. Moreoverꎬ the greater fractal dimension of cracks isꎬ the more obvious soil cracking isꎬ and the greater radon exhalation rate will be.","PeriodicalId":9976,"journal":{"name":"中国安全科学学报","volume":"8 1","pages":"171"},"PeriodicalIF":0.0,"publicationDate":"2020-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86850815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：