scholarly journals Computer simulations in the ventilation network of the Vulcan Mine

2022 ◽  
Vol 354 ◽  
pp. 00050
Author(s):  
Corneliu Boantă ◽  
Cristian Tomescu
Keyword(s):  
Ventilation System ◽  
Health Conditions ◽  
Ventilation Network ◽  
Computing Technology ◽  
Calculation Technique ◽  
Safety And Health ◽  
Mineral Substance ◽  
Mining Works ◽  
Microclimate Conditions ◽  
Ventilation Networks

Maintaining safety and health conditions underground, especially where potentially explosive atmospheres are possible, depends mainly on how the ventilation system is built, applied and operated in the ventilation network. The ventilation networks of a mining unit for the exploitation of the useful mineral substance are mining works that aim to ensure optimal microclimate conditions in the underground. An ventilation network is built of nodes and branches, in order to establish its structure. In order to establish the optimal air flows at branch level, specialized programs are used, with the help of which the modeling, solving and optimization of the ventilation networks can be performed. Optimizing the management of the ventilation system involves in-depth and complex analyzes on the ventilation network that require a huge volume of data that can be processed only with the help of computing technology. The paper presents an analysis of the ventilation network of the Vulcan mine using the calculation technique to simulate situations that may occur in the ventilation system.

Update of the Ventilation Network Related to Livezeni Mine

Mining Revue ◽  
2021 ◽  
Vol 27 (2) ◽  
pp. 1-5
Author(s):  
Eva Biro ◽  
Sorin Mihai Radu ◽  
Doru Cioclea ◽  
Ion Gherghe
Keyword(s):  
Underground Mining ◽  
Ventilation Network ◽  
International Level ◽  
Mineral Substances ◽  
Air Flows ◽  
Mining Works ◽  
Mining Work ◽  
Over Time ◽  
Ventilation Networks

Abstract The ventilation networks are associated with the set of underground mining works used for the extraction of useful mineral substances. Over time, the ventilation networks involve a change in the structure due to either the expansion or restriction of the mining works structure. For the establishment of air flows at the level of each active mining work, specialized programs are used at international level. These programs allow the modelling and solving of complex ventilation networks. The most advanced specialized programs are those from the VENTSIM range. The paper presents the updating of the ventilation network related to Livezeni mine, with the help of the VENTSIM program.

scholarly journals Influence of Applying Additional Forcing Fans for the Air Distribution in Ventilation Network

2016 ◽  
Vol 23 (3) ◽  
pp. 163-171
Author(s):  
Nikodem Szlązak ◽  
Dariusz Obracaj ◽  
Marek Korzec
Keyword(s):  
Ventilation System ◽  
Underground Mines ◽  
Air Distribution ◽  
Ventilation Network ◽  
Airflow Rate ◽  
Total Resistance ◽  
Subsurface Structure ◽  
Pull Systems ◽  
Underground Workings ◽  
Ventilation Networks

Abstract Mining progress in underground mines cause the ongoing movement of working areas. Consequently, it becomes necessary to adapt the ventilation network of a mine to direct airflow into newly-opened districts. For economic reasons, opening new fields is often achieved via underground workings. Length of primary intake and return routes increases and also increases the total resistance of a complex ventilation network. The development of a subsurface structure can make it necessary to change the air distribution in a ventilation network. Increasing airflow into newly-opened districts is necessary. In mines where extraction does not entail gas-related hazards, there is possibility of implementing a push-pull ventilation system in order to supplement airflows to newly developed mining fields. This is achieved by installing subsurface fan stations with forcing fans at the bottom of downcast shaft. In push-pull systems with multiple main fans, it is vital to select forcing fans with characteristic curves matching those of the existing exhaust fans to prevent undesirable mutual interaction. In complex ventilation networks it is necessary to calculate distribution of airflow (especially in networks with a large number of installed fans). In the article the influence of applying additional forcing fans for the air distribution in ventilation network for underground mine were considered. There are also analysed the extent of overpressure caused by the additional forcing fan in branches of the ventilation network (the operating range of additional forcing fan). Possibilities of increasing airflow rate in working areas were conducted.

scholarly journals The process of closing dynamics applied to the ventilation network of Paroşeni mine

2020 ◽  
Vol 305 ◽  
pp. 00080
Author(s):  
Florin Rădoi ◽  
Doru Cioclea ◽  
Corneliu Boantă ◽  
Cristian Tomescu
Keyword(s):  
Real Time ◽  
Ventilation System ◽  
Ventilation Network ◽  
Real Time Visualization ◽  
Ventilation Networks

The decision to begin the process of closing/preserving a mining objective requires the analysis of a complex of factors that interact and influence the efficiency of decision. Solving the ventilation networks with the help of computing is a huge step forward that allows optimization of the air management and real-time visualization of network changes. The method of solving the ventilation network with the help of the computation, allows the modeling and solving of the ventilation networks as well as any simulations of changes that may occur in the ventilation system regardless of its complexity, during the closing period. This paper will present the process of closing dynamics in a complex ventilation network.

The Awareness Level of the Safety and Health of the Operational Level

2017 ◽  
Vol 3 (1) ◽  
pp. 42
Author(s):  
Roshanira Che Mohd Noor ◽  
Nur Atiqah Rochin Demong
Keyword(s):  
Health And Safety ◽  
Health Conditions ◽  
Effective Strategies ◽  
Operational Level ◽  
Safety And Health ◽  
Health Factors ◽  
The Cost ◽  
The Relationship ◽  
Awareness Level

Providing a safe and healthy workplace is one of the most effective strategies in for holding down the cost of doing construction business. It was a part of the overall management system to facilitate themanagement of the occupational health and safety risk that are associated with the business of the organization. Factors affected the awareness level inclusive of safety and health conditions, dangerous working area, long wait care and services and lack of emergency communication werethe contributed factors to the awareness level for the operational level. Total of 122 incidents happened at Telekom Malaysia Berhad as compared to year 2015 only 86 cases. Thus, the main objective of this study was to determine the relationship between safety and health factors and the awareness level among operational workers.The determination of this research was to increase the awareness level among the operational level workerswho committing to safety and health environment.

scholarly journals A Predictive Model Assessing Genetic Susceptibility Risk at Workplace

2019 ◽  
Vol 16 (11) ◽  
pp. 2012 ◽  
Author(s):  
Chiarella ◽  
Capone ◽  
Carbonari ◽  
Sisto
Keyword(s):  
Foreign Language ◽  
Principal Component ◽  
Health Conditions ◽  
Genotype Frequency ◽  
Individual Heterogeneity ◽  
Cultural Backgrounds ◽  
Host Countries ◽  
Polymorphic Genes ◽  
Safety And Health ◽  
The Social

(1) Background: The study of susceptibility biomarkers in the immigrant workforce integrated into the social tissue of European host countries is always a challenge, due to high individual heterogeneity and the admixing of different ethnicities in the same workplace. These workers having distinct cultural backgrounds, beliefs, diets, and habits, as well as a poor knowledge of the foreign language, may feel reluctant to donate their biological specimens for the biomonitoring research studies. (2) Methods: A model predicting ethnicity-specific susceptibility based on principal component analysis has been conceived, using the genotype frequency of the investigated populations available in publicly accessible databases. (3) Results: Correlations among ethnicities and between ethnic and polymorphic genes have been found, and low/high-risk profiles have been identified as valuable susceptibility biomarkers. (4) Conclusions: In the absence of workers’ consent or access to blood genotyping, ethnicity represents a good indicator of the subject’s genotype. This model, associating ethnicity-specific genotype frequency with the susceptibility biomarkers involved in the metabolism of toxicants, may replace genotyping, ensuring the necessary safety and health conditions of workers assigned to hazardous jobs.

Looking Back: The Commission on Safety and Abuse in America's Prisons

2011 ◽  
Vol 24 (1) ◽  
pp. 34-35
Author(s):  
Alex Busansky ◽  
Michela Bowman
Keyword(s):  
National Policy ◽  
Health And Safety ◽  
Health Conditions ◽  
Safety And Health ◽  
Incarcerated Population ◽  
Looking Back

In early 2005, the Vera Institute of Justice launched the Commission on Safety and Abuse in America's Prisons (CSAAP). In June 2006, the Commission released its report about the safety and health conditions in U.S. prisons and jails, Confronting Confinement, at a Senate Judiciary subcommittee hearing. This article summarizes how CSAAP recommendations have affected national policy. The Confronting Confinement report and the conversations that arose during the hearings held prior to it continue to fuel debate, provide support for needed change, and encourage efforts to ensure the health and safety of prisoners and staff alike. Keeping prison conditions at the forefront of concern remains a challenge, especially given the urgent need to reduce the size of the incarcerated population.

scholarly journals Travel, Pilgrimage and Health Hazards

JMS SKIMS ◽  
2012 ◽  
Vol 15 (2) ◽  
pp. 87-90
Author(s):  
Shariq Rashid Masoodi
Keyword(s):  
Health Care ◽  
Health Care Professionals ◽  
The Elderly ◽  
Health Hazards ◽  
Health Conditions ◽  
Anticipatory Guidance ◽  
Health Issues ◽  
Preventative Measures ◽  
Safety And Health ◽  
Potential Risks

Today more people are travelling than ever before. Travel uWith more people travelling, health care professionals should become more familiar with some of the unique health issues associated with travel and pilgrimage.Travel has some unique safety and health issues, especially for the young and the elderly. Physicians need to be aware of the health issues related to travelling, identify people at risk for health problems during travel, and provide appropriate anticipatory guidance. Many guidelines have been developed to help inform physicians about some of the health issues of people travelling. These guidelines are to provide information on the risks of travel to people, determine which pre-existing health conditions may be complicated by a particular mode of travel, and offer preventative measures that can minimize potential risks to people during the travel. sed to be a leisure which could only be afforded by a few.... JMS 2012;15(2):87-90

scholarly journals Construction Network Ventilation System for Underground LPG Storage Cavern

2018 ◽  
Vol 4 (7) ◽  
pp. 1521 ◽  
Author(s):  
Fang Lin
Keyword(s):  
Ventilation System ◽  
Ventilation Network ◽  
Road Tunnel ◽  
Axial Fan ◽  
Completion Status ◽  
Co Concentration ◽  
Ventilation Technique ◽  
Fluent Software ◽  
Ventilation Performance ◽  
Two Stages

Construction ventilation system is divided into two stages based on completion status of shafts in the underground petroleum storage project in Jinzhou, China. With the help of theoretical analysis and numerical simulations by using FLUENT software, in the first stage, reasonable construction ventilation is designed and cases with different outside temperature are discussed to investigate the effect of ventilation performance. It is found that with temperature difference increases, peak value of CO concentration, exhausting time of dirty air and required time to meet the CO concentration qualification decrease, but the influence degree is quite limited. Gallery-type network ventilation technique (GNVT) refined from theories of operation ventilation for road tunnel and mining ventilation network, is proposed to conduct the second stage construction ventilation. Ventilation performance of different ventilation schemes with various shafts’ states and diverse arrangements of fans are also analyzed in this study. It turns out that Axial-GNVT with shafts taking in fresh air and access tunnel ejecting dirty air has much better performance than traditional forced ventilation from access tunnel. Improved energy saving scheme is finally adopted to guide the construction. In addition, it is worth mentioning that there is no need to build middle ventilation shafts and construct shafts as large and long as possible. Field test of wind speed, dust, poisonous gas, atmospheric pressure, temperature are performed to detect ventilation effectiveness. Reduction coefficient =0.69is obtained from the test results in consideration of super-large section and it also indicates that there is no difference if the axial fan is at the shaft mouth or in the bottom.

scholarly journals Analysis of Pedestrians’ Perceptions about the Design Aspects of Crossing Facilities: A Case in Nizwa, Oman

2021 ◽  
Vol 6 (12) ◽  
pp. 175
Author(s):  
Muhammad Ashraf Javid ◽  
Mashood Khalid ◽  
Nazam Ali ◽  
Tiziana Campisi ◽  
Antonino Canale ◽  
...  
Keyword(s):  
Personal Characteristics ◽  
Health Conditions ◽  
Key Factors ◽  
Good Design ◽  
Pedestrian Bridges ◽  
Safety And Health ◽  
Pedestrian Crossing

This study aims to identify the key factors in pedestrians’ intentions when using crossing facilities. For this purpose, a comprehensive questionnaire was designed and conducted at selected locations in Nizwa city. The main investigated variables are linked to personal characteristics, opinions on the main reasons for accidents, and how hard it is for pedestrians to cross roads at different locations in Nizwa city. Statements were also designed on the safety and health aspects of pedestrian crossings, as well as the physical and design aspects of pedestrian crossing facilities. Suitable locations were selected for the survey to assess the main concerns of pedestrian facilities. A total of 280 usable samples were collected from the selected locations. The analysis results revealed that young pedestrians do not find it difficult to use pedestrian bridges and underpasses when crossing roads. Pedestrians’ prioritization of safety when crossing, pedestrians’ health conditions, the proper cleaning and lighting of facilities, and the good design of facilities are significant determinants of pedestrians’ intentions when using crossing facilities. Crossing facilities need to be maintained properly, for example, through the cleaning and lighting of facilities. Proper awareness among pedestrians and vehicle drivers is required for the safety of pedestrians.

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