Abstract
Contents
- Introduction
- 1. Theme urgency
- 2. Goal and tasks of the research
- 3. Content of work
- Conclusion
- References
Introduction
The modern mine represents a difficult network of excavations to which airing apply often some power sources and the whole complex of ventilating different constructions. Ensuring developments with a demanded consumption of air is one of the main tasks which are regularly solved by ITR of sites of VTB of coal mines and depressionny services of mine–rescue groups.
1. Theme urgency
Now the problem of leakages of air everything becomes more actual for the coal enterprises. It is necessary to submit bigger amount of air to mines at more considerable pressure that causes increase in losses of the electric power. Therefore both theoretical, and the practical solution of questions of fight against leakages of air is important at design and implementation of airing of mines.
2. Goal and tasks of the research
Research objective is the analysis of distribution of a depression on routes through vyemochny sites.
Main objectives of research:
- To carry out refastening modeling (increase in section with 8–10 m2 to 14–16 m2) sites with big resistance, by means of the program to construct depressiogramm.
- To estimate increase in a consumption of air in mine after refastening and if this size exceeds 10 % (an error of change of a consumption of air) that to consider possibility of reduction of size of external and internal leaks.
- To model transfer of the fan to underlaying performance data.
3. Content of work
At air movement on excavations some part it is lost, in the form of leaks. Because of leaks cases when capacities of the established fans don't correspond to the valid requirements of mines take place. Not to mention the economic party of a question. It is established that non-productive costs of means of the electric power in a year, caused only leakages of air, are estimated in tens of thousands of hryvnias. Besides, leakages of air through the developed space and cracks in mineral promote its self-ignition.
Object of research of a
master's thesis is the ventilating network
of
mine the Cold beam
of GP Makeevugol
.
The computer model of a ventilating network of mine the
Cold beam
is developed according
to the Guide to design of
ventilation of mines
with use of
a program complex
Ventilation of the mines
,
developed NIIGD
the Respirator
.
A basis for existing computer model is the depressionny shooting made
GVGSS of Ukraine in 2007. Further the computer model was modified
according to existing scheme of ventilation of mines.
For development of the projected scheme of ventilation the existing model of a mine ventilating network is taken for a basis.
Figure
1 –
the scheme of ventilation of mine
The final part of the diplom is based on comparison of results of the electric power of the actual and projected scheme of ventilation.
Conclusion
The thesis on a subject Research
of conditions of reduction of expenses of the electric power on mine
airing
it is carried out on real operating conditions of mine.
the Cold beam
In it the detailed analysis of a condition of airing of mine for 2010 is given, and also actions for improvement of airing of mine and reduction of leakages of air are made, namely: refastening of excavations, a soil podryvka (recalculation of their aerodynamic resistance on new section), sealing of ventilating constructions (increase in aerodynamic resistance to standard values), for rational use of fresh air at the minimum costs of the electric power of airing.
References
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