中国安全科学学报最新文献_第9页

Deformation mechanism and repairing technology for coal-rock uphill roadway under influence of dynamic pressure 动压影响下煤岩上坡巷道变形机理及修复技术

中国安全科学学报 Pub Date : 2020-03-28 DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.03.011

G. Lin, Wang Jiachen, Kong Dezhong, Wu Guiyi, Ma Zhenqian

{"title":"Deformation mechanism and repairing technology for coal-rock uphill roadway under influence of dynamic pressure","authors":"G. Lin, Wang Jiachen, Kong Dezhong, Wu Guiyi, Ma Zhenqian","doi":"10.16265/J.CNKI.ISSN1003-3033.2020.03.011","DOIUrl":"https://doi.org/10.16265/J.CNKI.ISSN1003-3033.2020.03.011","url":null,"abstract":"In order to solve difficulty of surrounding rock control under influence of dynamic pressureꎬ with uphill coal transportation roadway of a mine in Guizhou province as engineering backgroundꎬ main features of surrounding rock deformation of such kind of roadway were clarified through field investigation. Thenꎬ spatial and temporal distribution characteristics of plastic zoneꎬ stress field and displacement field were obtained by numerical simulation analysisꎬ and condition for shear ̄slip ̄fault occurrence of coal ̄rock interface was analyzed theoretically. Thenꎬ through analysis on action principle of overlap arch bearing structureꎬ it was found that failure mechanism of original \" bolt + mesh + shotcrete + anchor cable\" support was disappearance of main compression arch and effect limitation of subordinate compression arch. 中国安全科学学报 China Safety Science Journal 第30卷 2020年 Finallyꎬ repairing principle and a scheme were put forward with the core of collaborative control of \" grouting after covering U ̄steel shed + asymmetric and inclined cross ̄layer locking clamp cables\" . The practice shows that serious asymmetric deformation of surrounding rock can be effectively controlled with the proposed scheme.","PeriodicalId":9976,"journal":{"name":"中国安全科学学报","volume":"28 1","pages":"67"},"PeriodicalIF":0.0,"publicationDate":"2020-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89013262","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}

引用次数: 2

Identification of miners' unsafe behaviors based on transfer learning and residual network 基于迁移学习和残差网络的矿工不安全行为识别

中国安全科学学报 Pub Date : 2020-03-28 DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.03.007

Wen Tingxin, Wang Guitong, Kong Xiangbo, Li Mengxiao, BO Jingkai

{"title":"Identification of miners' unsafe behaviors based on transfer learning and residual network","authors":"Wen Tingxin, Wang Guitong, Kong Xiangbo, Li Mengxiao, BO Jingkai","doi":"10.16265/J.CNKI.ISSN1003-3033.2020.03.007","DOIUrl":"https://doi.org/10.16265/J.CNKI.ISSN1003-3033.2020.03.007","url":null,"abstract":"In order to accurately identify unsafe behaviors of miners and reduce occurrence of accidents in coal minesꎬ an image recognition method combining transfer learning and deep residual network is proposed. Firstlyꎬ behavior instances of miners were divided into three dimensionsꎬ namely completely safe behaviorsꎬ relatively safe behaviorsꎬ and unsafe behaviorsꎬ among which completely safe behaviors included walkingꎬ sitting and standingꎬ relatively safe behaviors included bendingꎬ squattingꎬ liftingꎬ pushingꎬ pullingꎬ waving and clappingꎬ and unsafe behaviors included falling and throwing. Thenꎬ ResNet50 network was used for trainingꎬ and transfer learning weight parameters of ImageNet data set were fine ̄tuned. Finallyꎬ 12 classification was conducted through full connection layerꎬ and final classification results were checked against test data. The results show that residual network model based on transfer learning is superior to other deep neural network models in identification accuracy of falling and throwing movementsꎬ and it can effectively identify unsafe behaviorsꎬ thus avoiding accidents caused by human factors.","PeriodicalId":9976,"journal":{"name":"中国安全科学学报","volume":"27 1","pages":"41"},"PeriodicalIF":0.0,"publicationDate":"2020-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82108752","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}

引用次数: 1

Safety evaluation method based on acoustic emission technology for large-scale storage tanks 基于声发射技术的大型储罐安全性评价方法

中国安全科学学报 Pub Date : 2020-03-28 DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.03.010

Song Gaofeng, Zhang Yan-bing, Sun Peipei, Shen Shuoxun, Wang Zhirong

引用次数: 0

Experimental study on suppression of gas and coal dust explosion by powder clouds 粉末云抑制瓦斯煤尘爆炸的实验研究

中国安全科学学报 Pub Date : 2020-03-28 DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.03.012

Huang Zi-chao, Si Rongjun

{"title":"Experimental study on suppression of gas and coal dust explosion by powder clouds","authors":"Huang Zi-chao, Si Rongjun","doi":"10.16265/J.CNKI.ISSN1003-3033.2020.03.012","DOIUrl":"https://doi.org/10.16265/J.CNKI.ISSN1003-3033.2020.03.012","url":null,"abstract":"In order to explore prevention and control measures for gas and coal dust explosionꎬ explosion ̄ proof performance of powder clouds is tested in roadways with large ̄scale sections. Firstlyꎬ an 2 m large pipe and its open space were used to study formation process and dynamic distribution characteristics of powder clouds. On this basisꎬ with explosion pressure and flame velocity as characteristic parametersꎬ gas and coal dust explosion and suppression experiments were conducted in a large roadway with a section of 7􀆰 2 m . The results show that the powder can cover 7􀆰 4 m section at 60 msꎬ and most of the powder is ejected at 1 200 msꎬ forming an effective explosion ̄proof barrier. When surface density of powder cloud reaches 8􀆰 1 kg / mꎬ flame can be completely extinguished within 13 mꎬ and maximum explosion pressure is reduced by 57􀆰 0% from 0􀆰 293 to 0􀆰 126 MPa while pressure rising time at 140 m is delayed by 137 ms. As power concentration increasesꎬ suppression effect of cloud curtain is enhancedꎬ and it can extinguish 第 3 期黄子超等: 粉体云幕对瓦斯煤尘爆炸隔爆效果的试验研究 flame in a short distance and greatly attenuate explosion pressure.","PeriodicalId":9976,"journal":{"name":"中国安全科学学报","volume":"23 1","pages":"74"},"PeriodicalIF":0.0,"publicationDate":"2020-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77692881","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}

引用次数: 0

Simulation analysis on traffic safety of signal-coordinated arteries 信号协调干线交通安全仿真分析

中国安全科学学报 Pub Date : 2020-03-28 DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.03.022

Jiang Xinguo, Ren Hankun, Fan Yingfei, L. Xiang, Fu Chuanyun

引用次数: 0

Energy characteristics of AE signal frequency band during coal rupture in mines with gas 含瓦斯矿井煤层破裂声发射信号频带能量特征

中国安全科学学报 Pub Date : 2020-03-28 DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.03.018

Zhao Aohan, Ma Yankun, Liu Jian, Chen Dezhong, Yuan Hongyong, Fu Ming

{"title":"Energy characteristics of AE signal frequency band during coal rupture in mines with gas","authors":"Zhao Aohan, Ma Yankun, Liu Jian, Chen Dezhong, Yuan Hongyong, Fu Ming","doi":"10.16265/J.CNKI.ISSN1003-3033.2020.03.018","DOIUrl":"https://doi.org/10.16265/J.CNKI.ISSN1003-3033.2020.03.018","url":null,"abstract":"In order to analyze gas's influence on AE band energy during coal rupture under loadingꎬ with structural coal as research objectꎬ uni ̄axial compression test was carried out by using self ̄developed gas ̄ containing coal test device. Thenꎬ signal processing method of fast Fourier transform (FFT) and wavelet packet analysis was used to obtain characteristics of AE band energy during coal rupture under different gas 中国安全科学学报 China Safety Science Journal 第30卷 2020年 pressure. The results show that the greater gas pressure isꎬ the larger main frequency of AE signal isꎬ the narrower frequency band isꎬ and spectrum transforms gradually from a complex multi ̄peak form to a single peak form. When three is gasꎬ with the increase of loading stressꎬ frequency band enriches and spectrum shifts to left gradually. As gas pressure changesꎬ energy of 2􀆰 92-4􀆰 38 kHzꎬ 4􀆰 38-5􀆰 84 and 7􀆰 3-8􀆰 76 kHz changes significantly while that in 2􀆰 92-4􀆰 38 kHz is basically same as the sum of 4􀆰 38-5􀆰 84 and 7􀆰 3-8􀆰 76 kHzꎬ showing an opposite trend. When stress of structural coal increasesꎬ 4􀆰 38-5􀆰 84 and 7􀆰 38􀆰 76 kHz indicate the largest increase and decrease of energy respectively. 2􀆰 92-4􀆰 38 kHz and 4􀆰 385􀆰 84 kHz can be used as characteristic frequency bands to study damage of structural coal under loading in mines with gas.","PeriodicalId":9976,"journal":{"name":"中国安全科学学报","volume":"103 1","pages":"115"},"PeriodicalIF":0.0,"publicationDate":"2020-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79518254","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}

引用次数: 2

Trajectory planning model for lifting operation considering spatial conflict 考虑空间冲突的起重作业轨迹规划模型

中国安全科学学报 Pub Date : 2020-03-28 DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.03.008

Jin Lianghai, L. Jiaxin, Zheng Xiazhong, Chen Shu, Chen Yan-gao

引用次数: 0

Experimental research on temporary closed wall constructed by graphene polyurethanen in coal mine 石墨烯聚氨酯在煤矿中临时封闭墙的实验研究

中国安全科学学报 Pub Date : 2020-03-28 DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.03.017

Wang Hua’e, Tang Yibo, Guo Pengwei, Huang Shihua, Zhou Jinqiang, Guo-ping Qian

{"title":"Experimental research on temporary closed wall constructed by graphene polyurethanen in coal mine","authors":"Wang Hua’e, Tang Yibo, Guo Pengwei, Huang Shihua, Zhou Jinqiang, Guo-ping Qian","doi":"10.16265/J.CNKI.ISSN1003-3033.2020.03.017","DOIUrl":"https://doi.org/10.16265/J.CNKI.ISSN1003-3033.2020.03.017","url":null,"abstract":"In order to address problems of heavy materials and inefficient construction of traditional mine ventilation structuresꎬ a new type of graphene polyurethane foam was developed and its performance for various structures was tested. Firstlyꎬ new graphene polyurethane foam was prepared using one ̄step method. Thenꎬ its hermeticity was tested through gas permeability experiments of plastic films and sheets. Finallyꎬ its structures were analyzed by using a comprehensive thermal analyzerꎬ a Fourier transform infrared spectrometer and a metallographic microscope. The results show that the density of new graphene polyurethane foam is only 40 kg / m . Infrared spectrum shows that it is rich in organic functional groups such as C = Cꎬ C = Oꎬ ̄OHꎬ ̄CO and ̄NHꎬ and based on observation of metallurgical microscopeꎬ distribution of 160 μm foam is uniform and stable. And the new material remains highly efficient and hermetic within 30 days of simulation testꎬ maintains excellent thermal stability within 400 °Cꎬ and can 中国安全科学学报 China Safety Science Journal 第30卷 2020年 extinguish within 0􀆰 13 s from fireꎬ thus reducing fire risks during its use as a temporary ventilation structure in the mine.","PeriodicalId":9976,"journal":{"name":"中国安全科学学报","volume":"25 1","pages":"109"},"PeriodicalIF":0.0,"publicationDate":"2020-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89876537","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}

引用次数: 0

Research on airport safety performance evaluation index system based on criteria for performance excellence and G1 method 基于卓越绩效标准和G1法的机场安全绩效评价指标体系研究

中国安全科学学报 Pub Date : 2020-03-28 DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.03.001

Yang Xiaoqiang, Z. Zhihua, Ji Haoran, Y. Chenguang

引用次数: 0

Research on thermal runaway expansion barrier technology of NCM power battery NCM动力电池热失控膨胀屏障技术研究

中国安全科学学报 Pub Date : 2020-03-28 DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.03.005

Z. Shaoyu, Xian Xue-lei, Dong Hai-bin, Li Yi, Y. Dongxing

引用次数: 1