Study of Methods and Development of Technological Scheme for Heat Removal from Rock Waste Dump

Saik, Pavlo

doi:10.4028/www.scientific.net/aef.25.128

Cited by 3 publications

(2 citation statements)

References 16 publications

(16 reference statements)

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“…The use of the wind-driven power plants at the territories of mine dumps of mining enterprises is one of the examples of their efficient operation. First of all, rationality of the engineering solution concerning the use of mine dump energy depends upon the mine dump potential as well as availability of the marketable product consumers [28]. Fig.…”

Section: Resultsmentioning

confidence: 99%

A concept to use energy of air flows of technogenic area of mining enterprises

et al. 2018

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Topical issues concerning the possibilities of effective energy generation on the basis of Ukrainian mining enterprises have been highlighted. Attention is drawn to one of the most challenging tendencies of nontraditional energy sources development in the process of wind-driven powerplant use. The plants consume energy of technogenic air flows. Operation schemes and engineering solutions as for the possibilities to involve nontraditional sources of energy resulting from operation of technogenic objects and industrial structures of enterprises (i.e. stopes, mine dumps, industrial facilities etc.) in power balance of a mining enterprise have been demonstrated. Energy efficiency of the wind-driven powerplants in the context of different operation schemes aimed at utilization of energy of technogenic air flows has been analyzed. Output of a wind-driven system as a component of technological segment of a mining enterprise making it possible to meet 20 to 44% of its power demand has been determined. The objective of the paper is to substantiate process solutions as well as technical and engineering ones as for the obtaining nontraditional energy sources basing upon introduction of wind-driven power plants.

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Section: Resultsmentioning

confidence: 99%

A concept to use energy of air flows of technogenic area of mining enterprises

et al. 2018

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“…2. Технологічна схема теплогенератора при підземній газифікації вугілля на базі трубчастих рекуператорів: 1 -вигазований простір; 2 -породи підошви вугільного пласта; 3,4 -породи покрівлі вугільного пласта; 5,6 -місце закладання відповідно газовідвідної та дуттьової свердловин; 7 -порожнина розшарування порід покрівлі; 8 -теплоізоляційний шар; 9 -рекупераційна трубчаста система Утилізація акумульованого тепла від порід, що вмішують генератор, та золошлаків у вигазованому просторі відбуваєтся за рахунок теплогенератора на базі рекупераційної трубчатої системи [16,17]. Тепловий рекуператор та розроблена технологічна схема його впровадження у підземному середовищі ефективно адаптується при зміні гірничо-геологічних умов залягання вугільного пласта та технологічних параметрів процесу газифікації.…”

Section: рис 1 параметри розповсюдження температури у підошві підземн...unclassified

Aspects for implementing the cumulative energy systems during underground coal gasification

Falshtynskyi¹,

Saik²,

Dychkovskyi³

et al. 2022

Coll. res. pap. nat. min. univ.

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Purpose. An innovative approach formulation to the rational development of the potential of coal mines to expand the economic activity of mining enterprises based on the implementation of underground heat generators during coal gasification. Methods. Based on the conducted analytical and laboratory research, to study the possibility of introducing underground heat generators and cogeneration systems during gasification of coal at the site of its occurrence. The basis for conducting analytical studies is the experience of implementing the specified modules and cogeneration plants. The basis for laboratory research is a laboratory setup that allows modeling the behavior of thermochemical and geomechanical processes in the resulting gas generator, depending on the mining-geological conditions of the coal seam occurrence, methods and ways of supplying injected blast mixtures to the fire face mirror. Findings. Current issues of implementing the cumulative energy systemsbased on mining enterprises are highlighted. It has been determined that a possible basis for expanding the range of economic activity at a coal-mining enterprise is the implementation of underground gasification technology. The main products of the latter are producer gas, thermal energy and chemical raw materials. The parameters of changing the temperature field in the immediate bottom of the underground gas generator and the producer gas temperature at the outlet from the gas production borehole have been studied. On the basis of their changes, the technological schemes of the underground heat generator are proposed. This makes it possible to use technogenic thermal energy both in the process of coal gasification and at the stage of attenuation of an underground gas generator, as well as a scheme of a cogeneration system with heat accumulation from products of borehole underground coal gasification (BUCG). Originality. An innovative approach has been developed to the rational technogenic thermal energy development during coal gasification at the site of its occurrence. Practical implications. The implementation of cumulative energy systems based on underground heat generators during coal gasification at the site of its occurrence and the subsequent use of thermal technogenic environment allow creating compact energy modules that can satisfy the energy needs of a mining enterprise.

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Substantiation of the Feasibility of Choosing a Suspension Based on the Sodium Group in the Treatment of Coal Mining Waste Dumps

Chobotko

2023

JDMI

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Purpose. To study the effectiveness of sodium group based suspensions: sodium hydroxide, sodium hydrocarbonate and sodium carbonate for neutralisation of spontaneous combustion processes of waste rock during the operation and formation of coal mining waste. To establish the dependence of the influence of suspensions on the chemical elements of the waste stockpile, taking into account external environmental factors. Methods. For solving the set tasks, methods of comparative analysis of theoretical and laboratory studies of the impact of suspensions on the processes of the mechanism of redox reactions of spontaneous combustion of waste heaps obtained in the process of processing minerals of coal mines were used. The application of rational method of processing the results of the experimental study of the interaction of waste mass with sodium solutions using the correlation analysis of Student’s t-criterion is described. Results. The spontaneous ignition mechanisms of the stockpile have been investigated, based on the interaction of the active chemical elements in the stockpile: pyrite, sulphur and iron oxide with the environment. The selection and optimization of the parameters of a sodium group based slurry when treating the stockpile will solve the problem of spontaneous combustion in the treatment of the stockpile by crystallizing the active chemical elements and filling in its porous structure. Scientific novelty. The dependence of the influence of the environment on the processes of thermal oxidation of waste rock mass is established. The expediency of application of methods and techniques for elimination of self-ignition foci, as the main factors of environmental pollution, is substantiated. A new expedient method and method has been proposed, which will allow estimating not only the economic effect but also the ecological one, which will contribute to improving the ecological and economic situation of the mining regions where mining wastes are located. Practical implication. It consists in the development of recommendations for methods and techniques to eliminate spontaneous combustion of mining wastes. The methodology for determining the required quantitative and qualitative composition of inert substances (suspensions) containing sodium group to eliminate sulphurous zones of exogenous combustion processes of waste mass is proposed. Recommendations on the use of these means and methods have been developed.

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Study of Methods and Development of Technological Scheme for Heat Removal from Rock Waste Dump

Cited by 3 publications

References 16 publications

A concept to use energy of air flows of technogenic area of mining enterprises

A concept to use energy of air flows of technogenic area of mining enterprises

Aspects for implementing the cumulative energy systems during underground coal gasification

Substantiation of the Feasibility of Choosing a Suspension Based on the Sodium Group in the Treatment of Coal Mining Waste Dumps

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