DonNTU

Masters DonNTU

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Artem Skrypnik Department:  Geotechnology and management Speciality:  Mineral deposits txtraction Theme of master's work: Methane extraction measures development in conditions of "Southdonbasskaya №3 mine", aiming at complex subsurface usage Chief scientist:  department MDE professor Sivohin V. I.

CONTENTS

1. Introduction
2. Topicality
3. Objective goal
4. Main part
5. Conclusion
6. Reference list

1.INTRODUCTION

     Coal industry has always played the leading role in the spheres of Economy and Politics during all the periods of Ukrainian development. At present day coal is considered to be practically the main energy carrier, providing 95.4% of Ukrainian energy.

     According to administrative division “The South-Donbasskaya№3” mine is a part of Maryansky district of Donetsk region. The mine was put in commission in 1984 with 2.4 million tons per year or 8000tons per day project capacity. The present day production capacity is 1.2 million tons per year or 4000 tons per day.

2. Topicality

3. Objective goal

     The objective of the work is the following: associated methane extraction for technical and economic results improvement at “South-Donbasskaya №3” mine, as an enterprise extracting not only coal but also methane from the coal beds and adjoining rocks. The methane usage in capacity of a fuel for cogenerational power station and methane-air mixture with a low CH4 content combustion at the ecological degassing-emissional flares, in such a way reducing environmental emissions and also quotes on emissions in CO2 recomputation sale.

4. Main part

     For objective attainment a complex approach is required. The following directions are to be considered:

     1. Preliminary degasification by means of well-drilling parallel to breakage face from development drifts during their propagation.

     2. Degasification of worked-out area by means of well-drilling into the top, ground and directly into the work-out space back saddle.

     3. Methane-air mixture with a low CH4 selection on the return mine jet by means of making up cell in the top of mine roadway for natural CH4 delamination.

     4. Application of membrane equipment for CH4 content increase in the methane-air mixture.

     Ukrainian annual present day natural gas consumption numbers about 70 billion m3 and only about a quarter is home-extracted. Ukraine imports natural gas from Russia. The price boost on natural gas is looming from day to day. All the above facts prove the extreme currency of mine methane application. Large-scale methane extraction from the coal deposits will essentially enable to satisfy Ukrainian needs of energy carriers.

     Ukrainian coal associated methane reserve is the 4th large in the world – about 15-20 trillion m3 and more than 11-13 trillion m3 is stored in Donbas mines. 4 billion m3 a year can be extracted (reciprocally 3 million tons petrol). The most gas-containing is the Krasnoarmeisk-Dobropollje direction. ‘TEO’ on the mine methane deposit development in Donetsk region is in the state of termination, the project is backed by USA government (for this country’s annual methane extraction is more than 50 billion m3 ).

     According to experts’ assessments coal bed methane stored in Donetsk and Lugansk region exceed 3 trillion m3.

     “South-Donbasskaya №3” is one the mine appropriate for methane extracting and utilization project development and adoption. The choice of the present mine for the gas project maintaining opportunity assessment is accounted for by considerable methane stores occurrence, high specific gas content within the bounds of mine allotment, essential contribution into coal extraction and favorable mine development outlook.

     “South-Donbasskaya №3” mine is now exploiting C210, C11,C13, C16 coal beds at the depth of 550-980m.

     Methane concentration in 1tone extracted coal numbers 20-182 m3. Enlarged methane streams occur along the monoclonal fold in the southern part of the mine.

     In the year 1998-1999 general amount of methane, extracted by means of mine degasification system, numbered 6.16 million m3, and 39 million m3 when ventilation system working.

Table 1.

Table 2.

     “SouthDonbasskaya №3” 11years degasification level was analyzed to assess balanced coal stores. During this period mine’s coal extraction has numbered 1502 up to 4301 tons, while methane emission has been 22,5-107,8 m3 /minute. During this time annual mine methane volume has increased from 11.9 up to 47.6 m3 per ton of dry and ashfree coal, while its usual level has increased from 1.2 up to 28.2 m3 per ton.

Table 3.