Interactive mobile equipment safety task-training in surface mining

Improving the quality of equipment training for the Heavy Equipment Operators(HEO)is a critical task in improving safety and eliminating equipment-related injuries in mining.One of major responsibilities for the HEOs is proper machine inspection.Traditional miner safety training includes the use of hardcopy documents and video instructions.However,modern mobile and computer technology offers tremendous potential to improve the training process.In this study,we apply a 360-degree camera,opensource platform WordPress^(TM),and the software Unity3D in order to create materials and tools for the HEOs safety training to help trainees better understand the pre-shift safety machine inspection.The computer-based safety task training developed in this research is tested and implemented at a surface mine in the southern United States.

Japanese National Safety Standards for Electrical Equipment

I am working in Japan electrical safety & environment technology laboratory,which is called JET for short. In JET, we are carrying out the safety test of electrical equipmentaccording to Japanese domestic standards or IEC standards. And in my section, our stuff is draftingsome national safety standards harmonized with IEC in cooperation with the government. The standardsare applied for the mandatory regulation and other schemes.

2007 special equipment safety

The General Ad- T ministration of Quality Supervision, Inspection andQuarantine of P. R.China (AQSIQ) issued a notice on May 28, 2007, requiring various locations torectify their procedures for checking special equipment and hoisting machines for hidden problems.To further clarify and implement responsibility in the safety management of special equipment inenterprises, inspection responsibilities and test organizations related to technical assurance areto be established.

Impact of Safety-Maintenance Practices on the Overall Performance of an Industry

The study aims to evaluate how safety-maintenance practices affect the mechanical engineering industry’s overall performance in Ghana. The study used a descriptive survey design technique to ascertain the type of maintenance engineering that was practiced in Ghanaian mechanical engineering workshops at the time of the study. In the mechanical engineering workshops, respondents provided both qualitative and quantitative data using a variety of data collecting instruments, with the quantitative approach being more common. The study employed Kumasi, Tamale, and Accra’s mechanical engineering workshops as a case study. The number of mechanical engineering workshop enterprises that made up the sample size for the questionnaire administration was sixty (60), chosen at random from the AGI membership registry. Primary data was gathered using interview guides and questionnaires. To analyse the data, descriptive statistics were employed. According to the study’s findings, mechanical engineering companies combined different maintenance techniques in order to best fit their organisational culture and equipment. Preventive shut-down, with a mean score of 4.78 and RII = 0.98, placing first (1st) in the Likert rating order, is the most frequently used maintenance system by respondents. The maintenance procedures employed by mechanical engineering organisations were influenced not only by their equipment and organisational culture but also by other factors such as cost, personnel expertise and external partnerships.

Key technologies and equipment for a fully mechanized top-coal caving operation with a large mining height at ultra-thick coal seams

Thick and ultra-thick coal seams are main coal seams for high production rate and high efficiency in Chinese coal mines, which accounts for 44 % of the total minable coal reserve. A fully mechanized top-coal caving mining method is a main underground coal extraction method for ultra-thick coal seams. The coal extraction technologies for coal seams less than 14 m thick were extensively used in China. However, for coal seams with thickness greater than 14 m, there have been no reported cases in the world for underground mechanical extraction with safe performance, high efficiency and high coal recovery ratio. To deal with this case, China Coal Technology ＆ Engineering Group, Datong Coal Mine Group, and other 15 organizations in China launched a fundamental and big project to develop coal mining technologies and equipment for coal seams with thicknesses greater than 14 m. After the completion of the project, a coal extraction method was developed for top-coal caving with a large mining height, as well as a ground control theory for ultra-thick coal seams. In addition, the mining technology for top-coal caving with a large mining height, the ground support technology for roadway in coal seams with a large cross-section, and the prevention and control technology for gas and fire hazards were developed and applied. Furthermore, a hydraulic support with a mining height of 5.2 m, a shearer with high reliability, and auxiliary equipment were developed and manufactured. Practical implication on the technologies and equipment developed was successfully completed at the No. 8105 coal face in the Tashan coal mine, Datong, China. The major achievements of the project are summarized as follows： 1. A top-coal caving method for ultra-thick coal seams is proposed with a cutting height of 5 m and a top-coal caving height of 15 m. A structural mechanical model of overlying strata called cantilever beam-articulated rock beam is established. Based on the model, the load resistance of the hydraulic support with a large mining height for top-coal caving method is determined. With the analysis, the movement characteristics of the top coal and above strata are evaluated during top-coal caving operation at the coal face with a large mining height. Furthermore, there is successful development of comprehensive technologies for preventing and controlling spalling of the coal wall, and the top-coal caving technology with high efficiency and high recovery at the top-coal caving face with a large mining height. This means that the technologies developed have overcome the difficulties in strata control, top-coal caving with high efficiency and high coal recovery, and enabled to achieve a production rate of more than 10 Mtpa at a single top-coal caving face with a large mining height in ultra-thick coal seams; 2. A hydraulic support with 5.2 m supporting height and anti-rockburst capacity, a shearer with high reliability, a scraper conveyor with a large power at the back of face, and a large load and long distance headgate belt conveyor have been successfully developed for a top-coal caving face with large mining height. The study has developed the key technologies for improving the reliability of equipment at the coal face and has overcome the challenges in equipping the top-coal caving face with a large mining height in ultra-thick coal seams; 3. The deformation characteristics of a large cross-section roadway in ultra-thick coal seams are discovered. Based on the findings above, a series of bolt materials with a high yielding strength of 500-830 MPa and a high extension ratio, and cable bolt material with a 1 × 19 structure, large tonnage and high extension ratio are developed. In addition, in order to achieve a safe roadway and a fast face advance, installation equipment for high pre-tension bolt is developed to solve the problems with the support of roadway in coal seams for top-coal caving operation with a large mining height; 4. The characteristics of gas distribution and uneven emission at top-coal caving face with large mining height in ultra-thick coal seams are evaluated. With the application of the technologies of gas drainage in the roof, the difficulties in gas control for high intensive top-coal caving mining operations, known as ＂low gas content, high gas emission＂, are solved. In addition, large flow-rate underground mobile equipment for making nitrogen are developed to solve the problems with fire prevention and safe mining at a top-coal caving face with large mining height and production rate of more than 10 Mtpa. A case study to apply the developed technologies has been conducted at the No. 8105 face, the Tashan coal mine in Datong, China. The case study demonstrates that the three units of equipment, i.e., the support, shearer and scraper conveyor, are rationally equipped. Average equipment usage at the coal face is 92.1%. The coal recovery ratio at the coal face is up to 88.9 %. In 2011, the coal production at the No. 8105 face reached 10.849 Mtpa, exceeding the target of 10 Mtpa for a topcoal caving operation with large mining height performed by Chinese-made mining equipment. The technologies and equipment developed provide a way for extracting ultra-thick coal seams. Currently, the technologies and equipment are used in 13 mining areas in China including Datong, Pingshuo, Shendong and Xinjiang. With the exploitation of coal resources in Western China, there is great potential for the application of the technologies and equipment developed.

Hazard identification for equipment-related fatal incidents in the U.S.underground coal mining

Based on the number of fatalities per year, a persistent area of concern in mine safety continues to be equipment related. Data from the period 1995 through 2007 were studied in order to identify major hazards for underground mining equipment-related fatal incidents and to perform an analysis of those that occurred over the last 13 years. Reports on equipment-related fatal incidents were obtained from the Mine Safety and Health Administration （MSHA）. The results show that underground mining equipment including continuous miner, shuttle car, roof bolter, load-haul-dump （LHD）, Iongwall and hoisting contributed to a total of 69 mining-related fatalities. The study reveals that the major hazard for continuous mining equipment-related fatal incidents is ＂Failure of victim to respect equipment working area＂, while the highest number of fatalities for shuttle car is attributed to the hazard ＂Failure of mechanical components.＂ The study further reveals that the highest number of fatalities for roof bolter, LHD, and Iongwall are attributed to the hazards ＂Working under unsupported roof＂, ＂Failure of management to provide safe working conditions＂, and ＂Failure of mechanical components＂, respectively. It is determined that one fatality for the hoisting system is attributed to the hazard ＂Failure of mechanical components＂ and one to the hazard ＂Failure to follow safe maintenance procedure＂. Finally, approaches to prevention were also discussed in this paper.

Real-Time Safety Helmet Detection Using Yolov5 at Construction Sites

The construction industry has always remained the economic and social backbone of any country in the world where occupational health and safety(OHS)is of prime importance.Like in other developing countries,this industry pays very little,rather negligible attention to OHS practices in Pakistan,resulting in the occurrence of a wide variety of accidents,mishaps,and near-misses every year.One of the major causes of such mishaps is the non-wearing of safety helmets(hard hats)at construction sites where falling objects from a height are unavoid-able.In most cases,this leads to serious brain injuries in people present at the site in general and the workers in particular.It is one of the leading causes of human fatalities at construction sites.In the United States,the Occupational Safety and Health Administration(OSHA)requires construction companies through safety laws to ensure the use of well-defined personal protective equipment(PPE).It has long been a problem to ensure the use of PPE because round-the-clock human monitoring is not possible.However,such monitoring through technological aids or automated tools is very much possible.The present study describes a systema-tic strategy based on deep learning(DL)models built on the You-Only-Look-Once(YOLOV5)architecture that could be used for monitoring workers’hard hats in real-time.It can indicate whether a worker is wearing a hat or not.The proposed system usesfive different models of the YOLOV5,namely YOLOV5n,YOLOv5s,YOLOv5 m,YOLOv5l,and YOLOv5x for object detection with the support of PyTorch,involving 7063 images.The results of the study show that among the DL models,the YOLOV5x has a high performance of 95.8%in terms of the mAP,while the YOLOV5n has the fastest detection speed of 70.4 frames per second(FPS).The proposed model can be successfully used in practice to recognize the hard hat worn by a worker.

Effect of Positive Workplace Gossip on Employee Silence: Psychological Safety as Mediator and Promotion-Focused as Moderator

The development of electronic information technology has made workplace gossip more ubiquitous.As a part of interpersonal communication on informal occasions,positive workplace gossip affects individuals’mood,cogni-tion,and behaviors.In light of this and based on the Social Interdependence Theory,the study proposed that positive workplace gossip has a negative effect on employee silence,and psychological safety mediates this rela-tionship.In addition,the promotion-focused moderates the relationship between psychological safety and employee silence.Based on a two-wave sampling design from 311 innovative enterprises employees,the results of Structural Equation Model by AMOS 22.0 and Mplus 7.0 supported all the hypotheses.Results revealed that positive workplace gossip can decrease the employee silence through the mediating role of psychological safety and moderating role of promotion-focused.Thesefindings provided theoretical implications and practical sugges-tions for enterprise managers to create positive communication climate to reduce employee silence.

Force application of laparoscopic surgeons under the impact of heavy personal protective equipment during COVID-19 pandemic

Objective:Surgeons are required to wear heavy personal protective equipment while delivering care to patients during the COVID-19 pandemic.We examined the impact of wearing double gloves on surgeons’performance in laparoscopic surgery.Methods:Eleven surgeons-in-training at the Surgical Simulation Research Lab of the University of Alberta were recruited to perform laparoscopic cutting tasks in simulation while wearing none,one pair,and two pairs of surgical gloves.Forces applied to laparoscopic instruments were measured.Results:Wearing gloves prolonged task times(one pair of gloves:301.6±61.7 s;two pairs of gloves:295.8±65.3 s)compared with no gloves(241.7±46.9 s;p=0.043).Wearing double gloves increased cutting errors(20.4±5.1 mm^(2))compared with wearing one pair of gloves(16.9±5.5 mm^(2))and no gloves(14.4±4.6 mm^(2);p=0.030).Wearing gloves reduced the peak force(one pair of gloves:2.4±0.7 N;two pairs of gloves:2.7±0.6 N;no gloves:3.4±1.4 N;p=0.049),and the total force(one pair of gloves:10.1±2.8 N;two pairs of gloves:10.3±2.6 N;no glove:12.6±1.9 N;p=0.048)delivered onto lapa-roscopic scissors compared with wearing no glove.Conclusion:The combined effects of wearing heavy gloves and using tools reduced the touching sensation,which limited the surgeons’confidence in performing surgical tasks.Increasing practice in simulation is suggested to allow surgeons to overcome difficulties brought by personal protective equipment.

团队对外领地行为如何影响团队知识共享:团队心理安全氛围与团队正念的作用

领地行为被引入组织行为研究领域后便受到广泛关注,探究团队对外领地行为对团队的积极作用具有重要意义。基于社会身份理论视角,构建一个被调节的中介模型,收集来自64个团队的329名员工数据,考察团队对外领地行为与团队知识共享的关系,分析团队心理安全氛围的中介作用以及团队正念的调节作用。研究发现:(1)团队对外领地行为正向影响团队知识共享,团队心理安全氛围在这一过程中起完全中介作用;(2)团队正念正向调节团队对外领地行为对团队心理安全氛围的作用,即当团队正念水平较低时,团队对外领地行为对团队心理安全氛围的影响作用以及团队心理安全氛围的中介作用均不显著;当团队正念水平较高时,会增强团队对外领地行为对心理安全的影响,且团队心理安全氛围的中介作用更显著。

平台型领导如何提升团队创新绩效——基于SEM与fsQCA的链式中介分析

为探究平台型领导对团队创新绩效的作用机制,选取团队学习氛围和知识场活性作为中介,团队心理安全作为调节,基于496位高新技术行业知识型员工样本,运用结构方程模型和模糊集定性比较分析两种方法检验理论模型。结果显示,平台型领导正向促进团队创新绩效,团队学习氛围和知识场活性在其中发挥链式中介作用;团队心理安全调节团队学习氛围与知识场活性之间的关系。以平台型领导、团队学习氛围、知识场活性和团队心理安全为前因条件、团队创新绩效为结果条件的模糊集定性比较分析结果支持以上结论,并得出提高团队创新绩效的两种前因组态模式,即“领导—成员互动模式”和“团队成员互动模式”。

公共安全与保障视角下的应急救援装备工业设计及应用研究综述

目的围绕公共安全与保障视角下的应急救援装备工业设计的理论、方法和案例。综述目前领域内的国内外研究现状和前沿成果,分析装备未来发展与应用前景。方法目前我国产业变革加速、公共安全与保障面临重大挑战,对应急救援装备设计与发展提出了更高要求。本文基于公共安全应急处置情景下“防护”与“救援”两个层面,梳理国内外典型个体防护和应急救援装备的工业设计需求、关键特征和支撑技术。结论针对我国公共安全与保障领域的个体防护与应急急救援装备需求,对比分析了国内外发展现状,梳理了政府政策支持和保障措施,总结了装备工业设计发展面临的机遇与挑战,提出了未来的应用前景,为我国防灾、减灾、救灾和公共安全应急处置的关键保障装备发展建设提供了新方向与新思路。

色彩心理学在道路交通标志中的应用研究

在现代城市交通系统中,道路交通标志作为重要的导向和安全提示工具,其设计不仅仅涉及功能层面的要求,更需要考虑色彩心理学对用户的潜在影响。本文基于道路交通标志的色彩心理学,通过深入研究色彩在道路标志中的作用和影响,对不同色彩在心理学上的解读,以及在道路标志设计中的具体应用,挖掘不同色彩对用户行为产生的潜在影响,为未来的道路交通标志设计提供更为科学的依据与设计参考,使其更好地适应城市发展的需求,提升交通安全性和用户体验。

LNG储运安全保障技术发展与展望

中国作为液化天然气(LNG)进口大国主要通过LNG运输船运至沿海地区的LNG接收站,经气化后向内陆地区通过管道进行输送,其中,储罐和高压泵等储运关键设备发挥着核心支撑作用。本文阐述了LNG从船运到LNG接收站再进入管线输送过程中所涉及的LNG储运技术与关键设备发展状况,分析了LNG船运过程传热与蒸发抑制技术,储存、冷凝及气化等静设备以及长管线输送动力设备等关键设备的研发难点,讨论了LNG管线安全输送保障技术。提出了要进一步加强理论研究和关键技术突破,重点研发LNG储运关键设备,确保LNG储运过程的安全可靠性,实现LNG储运关键设备全部国产化和能源重大工程的自主可控发展。

考虑生产安全的工业园区联络线功率平滑策略

高比例新能源接入工业园区已成为高耗能工业负荷低碳转型的主要途径,而联络线功率剧烈频繁波动是园区低碳转型的关键问题.因此,提出一种考虑生产安全的工业园区联络线功率平滑策略.首先,分析电解铝和矿热炉的可控设备控制模型,构建基于联络线功率波动反馈的工业负荷功率闭环反馈控制模型.考虑工业生产核心影响因素,构建温度状态指标模型,形成考虑工业生产核心因素的典型工业负荷需求侧响应惩罚成本模型,并以工业生产的惩罚成本最小为优化目标,将控制目标分配至各工业负荷.最后,构建基于云南电网文山区域网架的MATLAB在线计算和RTDS仿真实时交互算例,结果表明,该算法自适应更新生产设备温度,有效降低功率调节对生产的影响,且联络线购电成本可降低36.4%.

城市轨道交通系统安全韧性思考与实践

[目的]城市轨道交通作为城市的重要交通基础设施,对保障城市安全有序运行至关重要。为应对城市轨道交通系统所面临的安全挑战,需探讨提升城市轨道交通系统安全韧性的策略。[方法]介绍了“安全”的相关定义和“韧性”的相关表述,提出了城市轨道交通系统安全韧性概念的内涵。基于上海轨道交通的建设和运营实践,结合具体案例,围绕隧道结构安全性、设施设备可靠性和系统协同性三个方面提出了提升城市轨道交通系统安全韧性的策略。[结果及结论]提出以强化本质安全、系统安全为核心,通过夯实隧道结构安全基石、强化关键设施设备可靠性、增强系统间匹配与协同等关键性举措不断提升城市轨道交通系统的安全韧性。

特种设备风险控制管理模型研究

为提高特种设备安全管理的效率,实现特种设备管理资源的高效配置,提高特种设备企业的安全管理水平,首先,建立特种设备的三级风险评价指标体系;其次,基于层次分析法(Analytic Hierarchy Process,AHP)计算各级风险评价指标的权重,进而建立三级风险评价模型;最后,结合分类预警及协同治理2个环节,构建了特种设备风险控制管理模型,并运用所建模型剖析具体案例。研究表明,特种设备风险控制管理模型可为开展特种设备安全管理工作提供重要的数据支持和技术方法,具有一定的科学性和有效性。

为何迎“险”而上?管理开放性对越轨创新的影响

如何有效地帮助组织引导员工实施越轨创新,迫切地需要理论界和实践界给出答案,现有研究鲜有基于信息加工视角考察管理开放性对越轨创新的影响。通过236名在职员工两阶段数据,探讨了管理开放性对越轨创新的作用机制与边界条件。结果表明:管理开放性对越轨创新具有显著正向影响,心理安全感在管理开放性与越轨创新之间起部分中介作用,创新导向人力资源管理实践在管理开放性与越轨创新之间起正向调节作用,集体主义导向在心理安全感与越轨创新之间起正向调节作用。研究结论有助于拓展越轨创新的理论研究,并为企业更好地激发和引导越轨创新提供相关对策。

从被动响应到主动应对:心理资本与安全动机对建筑工人前摄危险感知行为的双重差异影响

为促进建筑工人危险感知由被动向主动转变,减少安全事故发生,聚焦前摄危险感知行为。本文基于社会认知理论和自我决定理论,采用实证研究方法,重点探索心理资本与安全动机对建筑工人危险感知行为的主动性、前瞻性和变革性的双重差异影响,并考虑安全动机的调节作用。结果表明:相较于安全动机,心理资本对危险感知行为主动性、前瞻性和变革性的正向影响更强;在危险感知行为的主动性、变革性方面,韧性和自主安全动机的影响最强,且韧性影响作用更大;在危险感知行为的前瞻性方面,希望和受控安全动机影响最强,且希望影响作用更大;自主、受控安全动机在心理资本对前摄危险感知行为的细化影响中起有限调节作用。研究将前摄行为拓展到施工安全领域并聚焦危险感知情境,结果可为有效促进建筑工人危险感知由被动向主动转变提供科学建议,以有效预防安全事故。

1295例静脉留置针不良事件分析及监管工作改进建议

目的基于真实世界数据,探讨影响静脉留置针使用安全的相关因素,针对该产品不良事件监测工作提出改进建议。方法收集2020年4月至2021年3月河南省药品不良反应监测中心收到的河南省企业生产的静脉留置针不良事件报告,剔除错报、误报、重复上报及无效报告后共纳入1295例不良事件报告。对不良事件的上报情况、患者情况、类型、表现进行分析,并针对静脉留置针不良事件监测工作提出改进建议。结果1295例不良事件中,静脉留置针故障类不良事件919例,占70.97%,其中漏液、堵塞最常见,发生原因主要包括产品质量问题、操作技术及超范围使用等;患者伤害类不良事件548例,占42.32%,其中穿刺部位红肿最常见,发生原因主要包括软管有毛刺、操作不熟练、患者血管条件差等。结论建议通过以下方面改进静脉留置针不良事件监测工作:(1)建议医疗机构加强培训,培养主动监测及上报意识、持续提升不良事件报告质量;(2)建议产品生产、经营企业承担不良事件监测责任,加强分析评价并采取有效控制措施;(3)建议监管部门规范不良事件术语,积极开展重点监测,持续提升用械安全。