The next part provides details of the technologies and tools available to operate a system at or near its maximum efficiency. They examines the airflow pattern in mine ventilation system in bord and pillar system of mining with the help of twodimensional computational fluid dynamics. Ventilation is an essential component of mine operations as providing fresh air to workplaces, diluting and. More heat is added to the air from the strata, machines and other sources. The target audience includes technologists, mine operators and engineers who are involved in the design, management and operation of auxiliary mine ventilation systems. The air distribution in the mine should be effective. Within the mining industry, a safe and economical mine ventilation system is an essential component of all underground mines. The design for the pre ventilation system of the okaba coal deposit required 145 m 3 s of air with a main fan pressure of 2. Ventilation system design for the wassa underground mine. Methane is diluted to nonexplosive concentrations and evacuated from the mine by supplying sufficient quantities of fresh air by blowing or exhausting fans.
Although it contributes nothing directly to the production phase of an operation, the lack of proper ventilation often will cause lower worker efficiency and decreased productivity, increased. Indicative image of a typical fresh air intake 329 figure 321. The accuracy of the calculations depends mainly on the prescribed input data, i. Temperature prediction model in the main ventilation system of an. Pdf airflow stability and diagonal mine ventilation. Ventilation shaft slab showing completed pile driving 333. Basic ventilation system underground where d is a ventilation door or airlock, r is a mine regulator and 1, 2, 3 are working places with a surface exhaust fan. As a result, changes in airflow resistance will strongly affect the efficiency with which air is delivered to the working place. Ventilation systems are established to delivering breathable fresh air. Only work to reduce the concentration of methane below one percent shall be permitted. Flowthrough ventilation is the main ventilation circuit for the mine.
An overcast system to block an intersection between two or more mine passageways so as to prevent the mixture of intake air with return air. The source of these gases are equipment that runs on diesel engines, blasting with explosives, and the orebody itself. The third part provides three demonstration project case studies involving fans and ventilation systems, two of which were completed by the. Fran about the of the 19th century f the of inechanical ventilation.
Mine system and control devices a well designed and properly implemented ventilation system will provide beneficial physiological and psychological side effects that enhance employee safety, comfort, health, and morale. Indicative image of a typical exhaust fan installation 330 figure 322. Underground ventilation surveys are an essential part of managing your ventilation system, and are required by law in many countries to ensure compliance with local rules and regulations. Ms excel to formulate and solve a ventilation network problem. Proceedings of the 11th international mine ventilation congress. Get free access to the library by create an account, fast download and ads free.
Introduction to mine ventilating principles and practices cdc. In view of the complexity of the system and mine development, it is easy to understand that. Select and operate mine fans determine natural ventilation in a mine know the features of us coal mine ventilation system and methods to design homework 35 % ethics report 5% project report 15 %. Factors which determine total primary volume capacity and pressure requirements for a mine include the extent and depth of the mine, the complexity, and the stoping. Ventilation systems are critical components of the mining system to effectively remove hazardous gas and keep and acceptable temperature 2. Natural galleries and other connected openings control elements of the air flow dams, fences, doors, regulators, etc. Therefore, an effec tive and efficient ventilation system with the tasks to provide fresh air in sufficient quality and quantity in all operating areas, to dilute and.
Ventilation system design for the codelco new level project. Mine ventilation systems developed according to conventional design criteria the enhanced power and reduced costs of microcomputers led to the evolution of selfcontained software packages that allowed very easy interaction between the user and the computer. This book presents a comprehensive treatment of mine ventilation in terms of theory and practice. Two basic types of ventilation systems include homotropal and antitropial systems. The effect of mine ventilation depends on airflow quantity and its distribution in the ventilation networks, which changes during the mine life 3. It is based on the commercially available vnetpc version 3. Air samples were collected in glass syringes and analyzed by. An ability to decide and design ventilation system for underground mine.
Ventilation on demand is the conceptual name of any optimisation in mine ventilation systems that targets the intelligent and controlled supply of individual mine sites with the required quantities of air in the time they are needed. Increasing energy efficiency of mine ventilation systems. Pdf airflow stability and diagonal mine ventilation system. The ventilation system of a mine may be too complex to be used in manual planning, analysis. Wippvent is an interactive mine ventilation simulation software program developed by wid and its subcontractor, mine ventilation services inc. Underground mine ventilation technical aspects of mining. An ability to estimate the requirements of ventilation in an underground mine 3. The outcome of the project is an online system that can report changes in the mine ventilation system, allow causes of changes to be isolated and rectified, improve balancing of available air. The importance of the ventilating system in coal mining is recognized. Main entries to circulate air at least one for intake and one for return. Evaluated fan operating parameters and the ventilation system results of the experimental area, this method can achieve good ventilation cooling effect and can save a lot of power energy.
Schematic flow diagram of the mine ventilation system 327 figure 320. Advanced mine ventilation presents the reader with a unique book providing the theory and applications for designing mine ventilation with computers, controlling respirable coal dust and diesel particulate matter, combustible gas control and, mine fire management. Pdf within the mining industry, a safe and economical mine ventilation system is an essential component of all underground mines. Pdf modelling of okaba underground coal mine ventilation. Practical auxiliary mine ventilation workshop august 2931, 2018. Vam project developers are likely to use continuous emissions monitoring systems cems on thesurface for monitoring ch. One major source of airflow resistance is the line brattice used to direct air from the last open crosscut to the working face. In many countries, the main ventilation fans for coal mines are required, by.
Improving the ventilation system at rosh pinah zinc mine the air flow entering the working faces was 41. Ventilation systems of mines are often too complex to predict and control the flow without numerical modeling. We cannot guarantee that every book is in the library. Ventilation safety training pdf files mine safety and. A mine ventilation system must prevent the release of dust into the gba, and remove air contaminated with dust from the areas where men and machinery are traveling or working. Hinsley 19001988 into the realization that a mine ventilation system is, indeed, a gigantic heat engine. Primary mine ventilation systems, a manual of mine. The air is distributed through the mine via internal ventilation raises and ramps, and flows are controlled by regulators and permanently mounted ventilation fans. The alternative used shall at all times provide at least the same degree of safety as control doors or bulkheads.
Some approaches to improve the ventilation system in underground. Ventilation system design for the prestea underground mine. Each full question will have sub questions covering all the. Each full question consisting of 16 marks there will be 2 full questions with a maximum of four sub questions from each module. Oct 17, 2017 the basic components of any type of mine ventilation system involve a combination of pipes, ducts, fans, cooling and heating systems, and occasionally air cleaning equipment 1. The book summarizes the latest knowledge created in the past 40 years in these areas.
Tutorials ventsim ventsim 3d mine ventilation design. Us201701965a1 overcast system for mine ventilation. They involve the estimation of numerous interdependent parameters pertaining to the network status. Mine ventilation systems developed according to conventional design criteria the enhanced power and reduced costs of microcomputers led to the evolution of selfcontained software packages that allowed very. Evaluating complex mine ventilation operational changes. Use vnetpc software to simulate a complex mine ventilation system.
Primary mine ventilation systemsthe layout of interconnected tunnels formed to access and exploit the underground mineral deposits defines the topology of an underground mine ventilation network. Quality assurance standards for mine ventilation models and ventilation planning. Problems relating to mine ventilation systems analysis are usually of a very complex nature. Primary mine ventilation systems the layout of interconnected tunnels formed to access and exploit the underground mineral deposits defines the topology of an underground mine ventilation network. Airflow sensitivity assessment based on underground mine. Practical auxiliary mine ventilation workshop august 2931. The primary ventilation system thus consists of an intake or intakes or downcasts through which the fresh air passes, the mine workings, and an exhaust or. Bulkheads are more susceptible to blasting pressure damage than stoppings because of their rigid nature and therefore have to be installed further away from blasts. Air enters the mine from surface via a shaft, ventilation raise or adit. The integration of mine simulation and ventilation. Main ventilation system circulates air from the portal to sections. This video contains snippets of a complete elearning course on mine ventilation systems developed by octave simulation services private limited.
Ventilation modelling software used by a competent experienced ventilation engineer is extremely download pdf. Optimization of parameters to improve ventilation in. Jun 24, 2016 4 layouts ventilation ventilation systems in mines components of the ventilation system. In this chapter, we shall define fan pressures and examine some of the basic theory of fan design, the results of combining fans in series and parallel configurations, the theory of fan testing and booster fan installations.
To enhance the operability of the underground ventilation system, and to utilize the realtime ventilation data available to the greatest extent possible, westinghouse electric corporation waste isolation division wid developed an interactive mine ventilation simulation soflware program called wippvent for the doe. Kissell2 abstract the bureau of mines found sulfur hexafluoride sf6, released from a lecture bottle, to be an ideal gaseous tracer for studying mine ventilation systems. In utube system air flows towards and through the working. Figure 3 shows a propeller fan blowing into a new mine that uses the split mine ventilation system. To maintain adequate ventilation through the life of a mine, careful advance ventilation planning. Methods to improve mine ventilation system efficiency. Pdf ventilation planning and design of the omerler b mine. Using sulfur hexafluoride as a gaseous tracer to study. Realtime airflow monitoring and control within the mine. Air enters the system and is compressed and heated by gravitational energy as it descends in downcasting shafts or slopes. Face ventilation system last hundred meters to face where coal is broken and removed. Underground coal mine ventilation air methane exhaust. The overcast system includes a first sidewall formed of one or more prefabricated panels, a second sidewall formed of one or more prefabricated panels, and a top member formed of one or more prefabricated panels, such that the top side spans the width. Coal mine ventilation systems are often subject to high leakage rates.
The design of a ventilation system is determined principally by the location and rates of generation of the contaminants within the mine circuit. Underground mine ventilation provides a flow of air to the underground workings of a mine of sufficient volume to dilute and remove dust and noxious gases typically no x, so 2, methane, co 2 and co and to regulate temperature. Introduction to mine ventilating principles and practices. Nptel mining engineering an introduction to underground. Although it contributes noth ing directly to the production phase of an operation, the lack of proper ventilation often will cause lower worker efficiency and decreased productivity, increased accident rates, and absenteeism. For the implementation of a vod systems, the following matters can be respected. An ability to analyze the components of mine air sample, design natural and mechanical ventilation and conduct ventilation survey. Practical auxiliary mine ventilation workshop august 20 22. These methods rely on measurements taken inside the mine in the approaches to shafts rather texhaust han at the exhaust fan on the surface. Application of natural ventilation in metal mine ventilation. Mining ventilation fundamentals emmanuel witrant emmanuel.
In addition, the efficiency of the existing howden fans during the ventilation survey was found to be only 67. In planning a ventilation system, the quantity of air it will be necessary to circulate to meet. Introduction to mine ventilating principles and practices author. The integration of mine simulation and ventilation simulation. Mine ventilation systems consist of hundreds of interconnected sections and applica tions, such as airways, raises, crosscuts, main shafts, ventilation shafts, subshafts, raise boreholes, ventilation doors, travelling ways, fans and regula tors 8. Mine ventilation systems ventilation is the control of air movement, its amount, and direction. Building engineering the guibal chimney or discharge tube was invented and applied to centrifugal fans this device was a venturi, continuing the scroll at the point in 1860 fig. Different types of ventilation systems depending on the type of mine and disposition of local geology, the ventilation system is chosen, the basic ventilation systems are. Blasting is the biggest single source of mine dust and is the most difficult process in which to control the release of dust. Most mine ventilation engineers are involved in ventilation planning and design in some capacity. Mine ventilation key concepts ventilation systems are established to delivering breathable fresh air controls the temperature and humidity protects the miner by evacuating hazardous gases from the coal mine. The impacts of mine fires on the underground ventilation system and the production of toxic gases have been difficult to model download pdf 1. Download full advanced mine ventilation books pdf, epub, tuebl, textbook, mobi or read online advanced mine ventilation anytime and anywhere on any device. Program this intensive workshop is designed to provide comprehensive training on auxiliary mine ventilation operation, planning and design as an integral part of day.
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