Abstract of the master's work
Соntent
2. Scientific importance and practical value of the thesis results
3. Purposes and targets of the thesis
4.Review of researches and developments on the topic
4.1 Review at the national level
5. Basic researches and results
Introduction
At the modern level of coal industry development coal mining should be carried out with the minimum losses and maximum usage of the rock mass extracted from the subsoil riches. The special importance is gained by the challenges to reduce the coal losses during its mining and benefication and to recycle the extracted mine solids rationally [1].
1. Topic relevance
Nowadays the attention of industry, both in the far- and near-abroad countries, is again paid to the rock waste disposal areas of coal mines. Wide range of different chemical compounds and elements including germanium and rare-earth, as well as alum earth for bauxite production, iron ore and coal having high level of availability, low prices and practically unlimited volumes of the feed stock – solids – makes this technology path potentially productive [2].
2. Scientific importance and practical value of the thesis results работы
The scientific importance of this Master’s Thesis is that after having performed the assigned tasks the economic and environmental effect from implementing the proposed technology will be evaluated. As a practical value of the research results it is planned to introduce environmentally significant measures at the enterprises of Ukraine
3. Purposes and targets of the thesis
Цель: Purpose: To develop measures for improving the environmental safety of coal waste recycling with gage material diversification and evaluate its impact on the environment.
For reaching the purpose it is planned to perform the following tasks:
• To analyze the national and foreign developments aimed at increasing the environmental safety of coal benefication waste recycling;
• To characterize the chemicals contained in coal waste;
• To contemplate the traditional variants of coal benefication waste recycling;
• To assess the appropriateness of implementing the proposed technology of coal benefication waste recycling;
• To calculate the economic and environmental effect from implementing the proposed technology of coal benefication waste recycling;
4. Review of researches and developments on the topic
4.2 Review at the national level
One of the basic directions which use simultaneously extracted solids at mines is the filling of mined-out space. It is the most widespread when mining-out takes place under build-up areas and industrial premises; during exploitation of seams with barely controllable solids and also seams inclined to sudden discharges of coal and gas; when aiming at fire prevention measures and protection of development headings [4].
4.3 Review at the world level
The USA, Poland, Germany… why cannot one see any gob piles there? That is because they recycle the solid, mix it with sand and other admixtures and fill the mined-out space with them. That is nothing new for us because in 1975-1976 such filling facility was in use at Gorky mine. There was the governmental decision for the mines of the Central Donets Basin to work out projects and budgets for building filling complexes. In Japan rare-earth elements, germanium etc are extracted from gob piles [7].
5. Basic researches and results
The usage of coal waste as road-building material
The technological peculiarities for building embankments made of coal waste are connected mainly with the necessity to liquidate the potential subsidence and create strong deformation-free structure with the specified content of pit-run fines. Difficult engineering-geological conditions, possibility for underflooding and even flooding of the road bed require creating the maximum strong structure along the whole embankment.
1 — road bed structure; 2 — reinforced roadside; 3 — coal waste; 4 — protective layer of split coal waste.
Picture 1 — The structure of embankment made of coal waste
1 — road bed structure; 2 — reinforced roadside; 3 — protective layer of clay soils; 4 — fireproof layer; 5 — coal waste; 6 — protective layer of split coal waste.
Picture 2 — The structure of embankment with fireproof layer.
Conclusion
The usage of coal waste by the road builders of the Donets Basin will enable to get significant economic effect. Besides, the costs of the sector for mine dump maintenance will be reduced; in the agriculture the losses of fertile soils taken for mine dump maintenance will be reduced. The environment protection effect is also considerable that improves the environmental conditions of the Donets Basin.
Literature
1. Эколого-экономическая оценка использования твердых углеотходов Восточного Донбасса—Москва: МГУ, 2010 – 127с. [электронный ресурс].— Режим доступа: http://www.mydisser.com
2. ГОСТ 3269-87. Щебень из природного камня, гравий и щебень из гравия для строительных работ. Методы испытаний. М., 1987.
3. УкрНИИ Углеобогащение. Отчет по теме “Исследование свойств отходов обогащения углей и породных отвалов в Донецком и Львовско-Волынском угольных бассейнах”. Луганск, 1984.
4. Цыганков В.Н., Михович А.С. Отвальная порода углеобогащения как строительный материал для плотин, дамб // Сборник научных трудов. — 2005. — № 3— C.762-765.
5. Зборщик М.П., Осокин В.В. Предотвращение самовозгорания горных пород.—К.: Техника, 1990.—176с.
6. Зборщик М.П., Осокин В.В. Горение пород угольных месторождений и их тушение.—Донецк.: ДонГТУ, 2000.— 179с.
7. Папуна Н. В. Переработка терриконов методом агломерации [электронный ресурс].— Режим доступа: http://www.masters.donntu.ru
8. О.В. Целуйко К опросу использования отходов углеобогащения [электронный ресурс].— Режим доступа: http://www.masters.donntu.ru
9.Меркулов В.А. Охрана природы на угольных шахтах.—М.: Недра, 1988..—320.
10. Краткая химическая энциклопедия.—Т.1.—М.: Советская энциклопедия, 1961.—1262 с.
NOTE
When writing this abstract the master’s qualification work is not completed. Date of final completion of work: December, 2011. Full text of the work and materials on a work theme can be received from the author or his scientific supervisor after that date.
© DonNTU 2011 Korshunova N.