scholarly journals Reducing the Labor Intensity of Hole Machining by Increasing the Accuracy of Countersinking Operations with Precast Tools

2021 ◽  
Vol 19 (4) ◽  
pp. 107-115
Author(s):  
I.P. Deryabin ◽  
◽  
A.S. Tokarev ◽  
Keyword(s):  
Labor Intensity ◽  
Hole Machining

Labor intensity as a risk factor for the formation of cardiovascular disease of energy facility operators

2020 ◽  
pp. 662-662
Author(s):  
V. N. Krasnoshchekova ◽  
N. E. Ilyukhin
Keyword(s):  
Cardiovascular Disease ◽  
Risk Factor ◽  
Cardiovascular System ◽  
High Intensity ◽  
Power Plants ◽  
Labor Process ◽  
Labor Intensity ◽  
Operating Personnel ◽  
Emergency Situations ◽  
Energy Facility

The functional shifts of the cardiovascular system at high intensity of the labor process for the prevention of psycho-emotional stress of the operating personnel and the prevention of the danger of emergency situations at power plants were studied.

Working conditions and the formation of health risks among workers of the petrochemical industry engaged in the production of methanol and its derivatives

2019 ◽  
pp. 266-271
Author(s):  
Nina M. Meshchakova ◽  
Marina P. Dyakovich ◽  
Salim F. Shayakhmetov
Keyword(s):  
Working Conditions ◽  
Health Risks ◽  
Quantitative Assessment ◽  
Circulatory System ◽  
Medical Examination ◽  
Physical Factors ◽  
Labor Intensity ◽  
Industrial Noise ◽  
Harmful Substances ◽  
The Impact

Introduction.Methanol and its derivatives occupy one of the leading places among the main organic synthesis intermediates in terms of their importance and scale of production. According to experts, by 2027 the global demand for methanol can reach 135 million tons, the annual growth will be about 5.5%. However, there is little information regarding the assessment of working conditions and occupational risks for workers in modern methanol production and its derivatives.The aim of the studyis hygienic assessment of working conditions and the formation of health risks in workers of modern production of methanol and methylamines.Materials and methods.The assessment of the main adverse factors of production is given. When studying the state of health, objective indicators (the results of an in-depth medical examination) and subjective (the results of a quantitative assessment of the risks of the main pathological syndromes associated with health) are considered.Results.According to long-term observations, the concentration of harmful substances in the air of the working area, indicators of labor severity, parameters of physical factors met hygienic requirements, with the exception of industrial noise exceeding the maximum permissible level, as well as labor intensity of 1 degree. The General assessment of working conditions corresponds to the category of harmful 2 degrees (3.2). According to the results of the medical examination and quantitative assessment of the risks of health disorders in workers, the most significant were functional disorders and diseases of the circulatory system. The levels of somatic pathology on the part of the main body systems were significantly higher in apparatchiks compared to the engineering and technical personnel (ETP).Conclusions:In the production of methyl alcohol and methylamines, the main hygienic importance is the impact on workers of the complex of harmful substances of 1-IV hazard classes in low concentrations, increased levels of industrial noise, labor intensity of 1 degree. According to the subjective assessment of health and medical examination, the greatest prevalence of health risks in workers was observed from the circulatory system, and the levels of the revealed somatic pathology were statistically significantly higher in apparatchiks compared with the ETP.

scholarly journals Application and Development of an Environmentally Friendly Blast Hole Plug for Underground Coal Mines

2018 ◽  
Vol 2018 ◽  
pp. 1-12
Author(s):  
Donghui Yang ◽  
Yixin Zhao ◽  
Zhangxuan Ning ◽  
Zhaoheng Lv ◽  
Huafeng Luo
Keyword(s):  
Split Hopkinson Pressure Bar ◽  
Low Cost ◽  
Blast Hole ◽  
Environmentally Friendly ◽  
Test System ◽  
Industrial Test ◽  
Labor Intensity ◽  
Rock Blasting ◽  
Hopkinson Pressure Bar ◽  
The Impact

Drilling and blasting technology is one of the main methods for pressure relief in deep mining. The traditional method for blasting hole blockage with clay stemming has many problems, which include a large volume of transportation, excess loading time, and high labor intensity. An environmentally friendly blast hole plug was designed and developed. This method is cheap, closely blocks the hole, is quickly loaded, and is convenient for transportation. The impact test on the plug was carried out using an improved split Hopkinson pressure bar test system, and the industrial test was carried out in underground tunnel of coal mine. The tests results showed that, compared with clay stemming, the new method proposed in this paper could prolong the action time of the detonation gas, prevent premature detonation gas emissions, reduce the unit consumption of explosives, improve the utilization ratio, reduce the labor intensity of workers, and improve the effect of rock blasting with low cost of rock breaking.

Effects of countersunk hole geometry errors on the fatigue performance of CFRP bolted joints

2021 ◽  
pp. 095440542110285
Author(s):  
Xuda Qin ◽  
Xingfeng Cao ◽  
Hao Li ◽  
Meng Zhou ◽  
Ende Ge ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Bolted Joints ◽  
Fatigue Performance ◽  
Machining Process ◽  
Fe Model ◽  
Hole Making ◽  
Hole Geometry ◽  
Geometry Error ◽  
The Relationship ◽  
Hole Machining

Due to good aerodynamic performance and reliability, countersunk bolt joint is one of the most commonly used connection methods for carbon fiber reinforced polymer (CFRP) components in the aircraft. However, the countersunk hole machining process is inevitably accompanied by geometric errors, which will directly affect the mechanical properties of the joint structure. This paper presents a numerical and experimental investigation on the effect of countersunk hole geometry errors on the fatigue performance of CFRP bolted joints. FE model of CFRP countersunk bolted joints with designed geometry errors are established, and the rationality of the FE analysis was verified by fatigue life and failure forms. The CFRP bolted structure failure mechanism under fatigue load and influence of hole-making geometry error (including countersunk fillets radius, countersunk depth, and countersunk angle) on the fatigue life are investigated. Based on the relationship between fatigue life and the geometry error, the corresponding tolerances for CFRP bolt joint countersunk hole are determined as well. The research results can provide a reference for establishing reasonable geometric accuracy requirements for CFRP joint hole machining.

Some results of a sociological survey on the health of the rural population of Tatarstan

1993 ◽  
Vol 74 (2) ◽  
pp. 164-165
Author(s):  
V. A. Kalistratov
Keyword(s):  
Labor Supply ◽  
National Economy ◽  
Rural Population ◽  
Agricultural Sector ◽  
The State ◽  
Economic Situation ◽  
Labor Intensity ◽  
State Of Health ◽  
Agrarian Sector

The study of the state of health of the population requires special attention due to the difficult socio-economic situation in which the entire national economy and, above all, the agricultural sector found itself. The labor intensity of workers in this industry directly depends on the season of the year, mechanized labor-intensive processes, labor supply. Of particular concern are the unfavorable tendencies that are now manifesting themselves more vividly. The agrarian sector of Tatarstan employs about 400 thousand people, of which almost 300 thousand are directly in agriculture.

CURRENT RATIONALE ISSUES LABOR COSTS IN THE COST OF MILITARY PRODUCTS AT DIFFERENT STAGES OF THE LIFE CYCLE

2021 ◽  
Vol 3 (5) ◽  
pp. 52-61
Author(s):  
D. V. ZVEREV ◽  
◽  
I. I. SAVELEV ◽  
Keyword(s):  
Life Cycle ◽  
The State ◽  
Regulatory Framework ◽  
Labor Intensity ◽  
Labor Costs ◽  
Special Equipment ◽  
Frame Work ◽  
The Cost

Based on the experience of checking the validity of prices for military products supplied within the frame-work of the state defence order, problematic issues of rationing of labor costs have been identified. The im-perfection of the current regulatory framework in the field of substantiating the labor intensity of work is shown. Proposals for the standardization of labor at various stages of the life cycle of weapons, military and special equipment are reasoned.

Sign in / Sign up

Export Citation Format

Share Document