3 edition of Ventilation in mines found in the catalog.
Ventilation in mines
|Statement||by Robert Wabner ... ; tr. from the German by Charles Salter; with thirty plates and twenty-two illustrations.|
|LC Classifications||TN301 .W2|
|The Physical Object|
|Pagination||xi, 240 p. :|
|Number of Pages||240|
|LC Control Number||09022035|
Heat transfer in such ventilation systems is similar to that in Ventilation in mines book exchangers in which the heat flux is fed sequentially through an inner tube 1, then through an annular space 3 formed by the inner and outer tubes, or vice versa, depending on the ventilation scheme. The last section on mine fire control discusses spontaneous combustion, frictional ignitions, mine explosions, and mine sealing and recovery. In a conversation with the writer, Mr. With rising energy prices and consequently stricter occupational exposure limits regarding gases and dust, mining companies are recently facing the question of how to face these changing demands in the future.
At times of equalization of temperature, there is likely to be little or no air circulation; this is particularly the case if the elevation of the mine intake and the return air courses at the surface are about equal. Adjoining intake and return airways Ventilation in mines book separated by the coal pillars or by installing "stoppings" most commonly in the form of a wall of some kind in any interconnecting roadways to prevent air short-circuiting between the roadways. Concerning knowing consumers and emission sources, vehicle tracking, vehicle identification and personnel tracking. In an event-based system, adequate reaction can also be given in case of fires and other unexpected events. A bulk of electric power is required for driving fans. Attempts of increasing ventilation to a maximum seems a good reaction to be on the safe side, but could be the wrong response, e.
It may be useful to provide access to electronic versions for field-based personnel. Shafts or tunnels that carry main air currents into or out of a mine and are also used for working purposes should Ventilation in mines book sufficient cross-sectional area so that the velocity of the air may be kept below lin. A small quantity of air may flow through mine workings naturally but this would be insufficient and uncontrolled and therefore it is necessary to provide a mechanical means of ventilating the mine. Depending on the individual requirements, ventilation can be arranged accordingly, such as with a pull or push, U-tube or flow-through, or split, perimeter or unit ventilation system. A well-consolidated upper slice gob can reduce ground control problems and provide a seal against spontaneous combustion. Analysing data and triggering commands can either be conducted by a central control system or decentral.
The first of men
How to Teach the Facts of Life (Family Accountability Communicating Teen Sexuality)
Image processing catalog.
country of memorable honour.
The iron chain
Trials and triumphs
Aerodynamics of power plant installation
Red Lake gold rush
Cumbria Cycle Way
New Zealand sea and shore birds.
The master of disguise
In many mines, a lateral is driven in the foot wall parallel to and only a short distance from a drift on the vein. A well designed ventilation system should be effective, flexible and economical.
Scientific awareness on fluid mechanics and thermodynamics increased the understanding of interdependencies 2. Only rarely does a metal mine use canvas or brattice deflecting curtains, line brattices, or regulators to force air into blind-end drifts, crosscuts, raises or stopes; yet frequently these agencies could be used to advantage.
Thus, VOD can hold immense saving potentials 5, 6. For instance, one example would be for Ventilation in mines book equipment. Level 4: Tagging. Ventilation is changed depending on certain activities within the mine.
Eight underground tracer gas releases and one gob gas venthole release are summarized. By installing variable speed control air quantity can be optimized hence the power.
Although the technology for the application Ventilation in mines book the dust control system investigated is readily available, it is evident that additional engineering studies should be made in each mine where the system is to be applied.
However, as only about one-tenth to one-twentieth as much compressed air is supplied Ventilation in mines book when ordinary air-circulating methods are Ventilation in mines book, the cost of ventilating blind ends by compressed air is from ten to twenty times as great as by fan methods, with the additional disadvantage that rarely is ventilation by compressed air jets or blowers efficient.
Mining Engineering, und Dr. Also as the drifts are lengthened, additional pressure losses result — necessitating another booster fan to look after the newly added pressure drop.
Geologic analysis indicates that the consolidation of the gob depends on the composition of the upper slice roof, the presence of water, and sufficient overburden pressure.
Ventilation on demand means supplying required amounts of fresh air to individual mining areas only at times they are needed. With rising energy prices and consequently stricter occupational exposure limits regarding gases and dust, mining companies are recently facing the question of how to face these changing demands in the future.
Presently, most mining occurs in open-pits, but with increasing demands on raw materials due to rapid growth in global population and industrialization, underground mining comes to play a critical role in supplying raw materials.
Kirunavaara Mine, Sweden 8. Chen, L. This means, that diesel fumes of a loader entering a section will not be diluted immediately, although the local ventilation system is adjusted in that very moment.
Depending on the individual requirements, ventilation can be arranged accordingly, such as with a pull or push, U-tube or flow-through, or split, perimeter or unit ventilation system. For these reasons, ventilating engineers look to keep the velocity of the air under ft.
Kurnia, A. This revised edition presents an engineering design approach to ventilation and air conditioning as part of the comprehensive environmental control of the mine atmosphere. To control where the air goes and how much gets there this used area and short cut are sealed off by stoping.
Substantial reductions in dust concentrations have been attained by increasing the volume and rate of air movement across the face and by controlling the airflow pattern.Get print book.
No eBook available. Go to Google Play Now» A Guide to Mine Ventilation Calculations. H. E. R. Rayner. Mine Ventilation Society of South Africa, - Mine ventilation.
0 Reviews. From inside the book. What people are saying - Write a review. We haven't found any reviews in the usual places. place for planning the ventilation and condition of the underground environment. The book remains a reference and text for professional engineers, researchers and teachers as well as for undergraduate and graduate students who have an interest in the planning and control of the environment in underground mines or other subsurface openings.
Get this from a library! Ventilation in coal mines: a handbook for colliery ventilation officers. [Great Britain. National Coal Board. Mining Department.;].Presents the principles of ventilation in mines with mathematical methods of calculating Ventilation in mines book and velocities needed for adequate ventilation.Presents the principles of ventilation in mines with mathematical methods of calculating pressures and velocities needed for adequate ventilation.We have also directed the book to practitioners of ebook ventilation in the field.
It should provide adequate depth and breadth to those who design or operate mines, with responsibility for environmental engineering and espe-cially for the health and safety of miners who rely on the underground atmo.