Masters DonNTU Zubkova Anna Viktorovna

General characteristic of activity

1. A urgency of a theme

Now the majority of collieries is conducted with activities on depth from above 1500м and fall into prone sudden outbursts coal and gas. In this connection actual problems of airing of mining outputs become.

2. The purpose of activity

To conduct the analysis of airing, to develop and justify measures on perfecting airing.

3. The content of activity

INTRODUCTION

The coal industry of Ukraine during lines last a flying is in a crisis condition, that first of all is stipulated by a general economic situation in country. For the last 15 flying it has not been constructed any new colliery adequate{answering} the modern requests, and on already existing activities on updating mining fund practically are not carried out{not conducted}.

In the beginning XXI on Ukraine 170 shafts are located, the main body of them is on Donbass where a main job for the majority of inhabitants are shafts. The structure of a mine air, climatic conditions in the underground workings, allowable contents of a carbonic gas, methane, noxious gases and a dust, travelling speed of air in mining outputs should conform the requirements of the operational Safety rules in coal and shaly shafts. On operating mines follow-up to the design of ventilation necessary calculations of an air flow are effected for airing mining outputs and shaft as a whole, selection of ways and a means of airing of blind drifts, are developed measures on steering of a methane emission of a means of ventilation and on maintenance of safety airing shaft.

The modern shaft represents the composite network{grid} of mining outputs to which airing apply frequently some energy sources and the whole complex of ventilation structures of a different stem. Maintenance of productions by a required air flow is one of the main tasks regularly decided YTV of epines VAP of collieries and depressed by services of mine rescue teams. At the same time complexity of the ventilation network, its{her} multiconnectivity, nonlinearity of the equations circumscribing air motion in mining outputs, do{make} practically impossible the solution of the given problem without application of computers.

In 1 chapter:

The brief characteristics of shaft and prospect for the development of mining operations is resulted. The geologic characteristics of a deposit, вскытие, a mine development, mining method, the transport, airing and time schedules of adaptation of reserves. Shaft V.M.Bazhanova put in operation in two queues. The first queue has been handed in operation in 1957 year. In connection with improvement of main storages on a layer nн1 activities on her have been stalled{stopped} in 1992 year. In the true season{term} is in a stage of liquidation. The second queue of shaft is handed in operation in 1964 year with full capacity of 800 thousand т. Coal annually. In 2004 year production capacity compounded{made} 900 000 t. About 2005 years production capacity 760 000 t is established{installed}. Now the shaft develops a layer m₃ "Makeevskij". Panels of a mine field are fulfilled in the degressive order. Main gate roads are carried out{conducted} in seam floor, for their content in a normal state, main inclined workings are carried out{conducted} behind a unloading lava on fallen in and dense breeds. The coal winning in lavas is effected by longwall sets of equipment 3КД-90 and by a combine РКУ-10. The transporting of coal on productions is effected by scraper conveyors and electric locomotives. Issue of coal on a surface from shaft implements furnace-charging carriages. In boreal part of a mine field the trunk line to which the network{grid} of runways of operating mines borders on passes. The shaft is referred to prone sudden outbursts coal, breed and gas. On shaft the four-removable mode of behavior is adopted: 3 changeovers - booties, 1 changeover - repair - preparatory.

In 2 chapter :

The forecast metanoobilnost shafts on a natural methane content and calculation of an expected absolute methane emission in planned coal faces and panels is resulted. The shaft falls into sverhkategornoy on methane, forecast metanoobilnost on a natural methane content, calculation of an expected absolute methane emission and the comparative analysis of outcomes forecast а metanoobilnost coal faces and the panels, received with use of data of gas filmings and therefore is necessary for a natural methane content of layers.

In 3 chapter :

To figure out an air flow for airing panels, for a separate ventilation of repayable and bolstered productions, chambers. To figure out air leaks through the ventilation structures located outside panels. Then coverage of shaft by computational quantity of air, difficulty of airing of shaft is determined.

In the season{term} of realization of depression survey in shaft acted{went} Qш.ф.20292 m³ /mines, Qш.расч. 14496 m³ / mines then coverage of shaft air compounded{made} 140 %. In our event n_sp=6,3 кВт*с/m³, that is at such value shaft V.M.Bazhanova falls into difficultly aired.

CALCULATION OF THE AIR FLOW FOR AIRING OF THE YIELD OF A SOFTWARE TO METHANE EMISSION

Calculation of an air flow for airing a coal face on methane emission is offered to use the following formula:

Qоч=100*Iоч*Kн/С-Со*Коз,

Where Iоч - mean expected outgassing in a coal face, m3 / mines;

Кн - a coefficient of irregularity of a methane emission, a lobe of a unit;

C - allowable according to SR concentration of methane in an air current coming from a coal face, %;

Co - concentration of gas in an air current acting{going} on panel, %;

Koз-goats the quotient which is taking into account air motion in connection work of the space, adjoining to face, Коз=1,2.

ATTENTION! Monitor behind uptake of values since "air flow" cannot be less than 0.

Calculation of an air flow for airing a coal face on methane emission:
Iоч. (m³/ mines)	5,675
Кн (lobes un.)	1,483
С (%)	1
Со (%)	0,05

In 4 chapter:

To be effected a state estimation of airing of shaft. In the season{term} of realization of depression survey in shaft be received 338,2 from air. Computational quantity air has constituted 241,6 m³ /s with. The shaft is as a whole provided with air on 140 %. On groups of objects of airing air acting{going} at shaft was distributed as follows (m³/s):

-Panels-94,7

-Development workings-10,3

-Cameras -45,5

-Bolstered a yield -129,3

-Internal escapes -58,4.

Total capacity of fans compounded{made} 338,2 m³/s. Panels are provided with computational quantity of air on 139 %. From 338,2 м³/s air acting{going} at shaft, 105 m³/s with it was used for airing panels and development workings. Separately aired preliminary works have been provided with computational quantity air as a whole on 102 %. Separately aired chambers are provided with computational quantity of air на 112 %. Are provided with computational quantity of air trolley garage and a warehouse of a compsuter hor.1012m on 142 % and 122 % accordingly. Total overexpenditures of air on escapes bolstered a yield has acted{arrived} 129,3 from air. Total overexpenditures of air on bolstered a yield and have constituted escapes 57,7 m³/с. The shaft falls into trudnoprovetrivaemy, as n>5 (see. SR).In an assay value of a condition of the ventilation network, it is possible to mark a following limitation in airing shaft:

- Availability of productions not procured computational quantity of air;

- Excess of internal escapes above rationed;

- Excess allowable SR norms{standards} of air temperatures on the main{basic} objects of airing;

- Excess allowable SR speeds of air in a number{series} of productions;

-Loss of depression in a number{series} of productions;

- Major above permitted standard air flows on airing of bolstered productions.

The literature:

1. Patrushev M.A., etc. " Perfecting of airing of collieries from experience of development and an introduction of efficient ventilation plans " Donetsk. "Donbass", 1976.-126p.

2. Design guidelines of ventilation coal шахт.- Kiev.: "Basis{Fundamentals}", 1994.-311p.

3. Ushakov K.Z., Burchakov Ampere-second., Puchkov L.A., Medvedev I.I. " The Aerology of mines ": the Tutorial for HIGH SCHOOLS,-М.:Nedra, 1987.-421p.

4. The instruction on calculation of quantity of air necessary for airing the operational collieries. M.:Nedra 1975.

5. A safety regulations in coal and shaly шахтах.-M.:Nedra, 1976.

6. Depression survey on shaft him{it}. V.M.Bazhanova. Torez, 2007.

Faculty: Geotechnologies and production management

Specialty: Safety of labour activity

Theme master’s activities: "The Analysis of a condition and development of measures on perfecting airing m.V.M.Bazhanova ground depression survey "

The chief:prof Stukalo Vitaly Antonovich

General characteristic of activity

1. A urgency of a theme

2. The purpose of activity

3. The content of activity

The literature: