Abstract
The article presents an analysis of modern geotechnological methods of gas extraction from coal technogenic deposits. Special attention was focused to surface methods complex resource development, which concentrated in filled rock dumps and sludge accumulators of coal-processing factories. The work describes physical-and-chemical methods of thermal impact on solid carbon-contained raw materials, which is considered as a binary mixture of coal and rock, in an oxygen-free medium or with the use of oxidants. The article presented the researches results of catalytic transformations taking place in the structure of a coal substance. Various versions of the use of catalysts in the processes of physical and chemical transformations of coal were proposed. The conducted researches allow to analyze the existing methods of impact on the mine medium identify the most perspective directions for the development of new methods in the field of geotechnological processes of gas extraction from coal technogenic deposits.
Highlights
The sustainable functioning of the fuel and energy complex of Ukraine is based on significant reserves of carbon-contained energy raw materials
Under action of thermal impact in oxidizing medium, in which oxygen, water vapor, carbon dioxide, air, or their mixtures can be used, the organic part of unconditioned coal feedstock is directly converted into a gas phase, which mainly consists of monoxide and carbon dioxide, hydrogen, methane water vapor and nitrogen
There are several conclusions: 1. In modern conditions, in order to increase gas production, it is necessary to develop new and improve existing geotechnological methods of coal deposit development that would meet the modern development of science and technology, be economically viable and environmentally friendly
Summary
The sustainable functioning of the fuel and energy complex of Ukraine is based on significant reserves of carbon-contained energy raw materials. In such a way, in order to increase gas production, it is necessary to develop new and improve existing geotechnological methods of coal deposit’s development that would meet the modern achievements of science and technology, and would be economically beneficial and environmentally friendly. High-ash coals and wash slurry wastes begin to use as a feedstock in thermal processing [1, 2]. Intensive investigations in this field of study predetermined by the undoubted advantages, such us low pressure, absence of oxidizing reagents or catalysts, simplicity of process organization and low capital intensity
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