Inkin, O. V. та Puhach, A. M. та Dereviahina, N. I. (2020) PHYSICAL-CHEMICAL AND TECHNOLOGICAL PARAM-ETERS OF IMPROVING PROFITABILITY OF UNDER-GROUND COAL BURNING. Topical scientific researches into resource-saving technologies of mineral mining and processing. с. 427-445.

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Title in English

PHYSICAL-CHEMICAL AND TECHNOLOGICAL PARAM-ETERS OF IMPROVING PROFITABILITY OF UNDER-GROUND COAL BURNING

English abstract

Currently, coal is the main natural energy carrier in Ukraine due to its limited resources of oil and natural gas. A promising method for extracting coal is underground gasification using thermochemical and mass-exchange processes. Ob-jective of the paper is to substantiate and implement the integrated approach aimed at the studies of filtration and mass-transfer processes within roof rocks of coal seams in the context of their underground gasification. Integrity of the studies is substantiated by the use of analytical calculations as well as physical and numerical modeling. Zones with different permeability have been determined and values of specific water inflow have been identified basing upon the performed numerical modeling and involving multicomponent transformations within roof formation.The research data actuality is in the studies of spatial and temporal dynamics of rock technogenic rock permeability above gasification channel depending upon their geological structure which will favour the substantiation of efficient engineering solutions to control a process of underground coal gasification under difficult hy-drogeological conditions. It has been substantiated that almost all disturbing factors have negative effect on gas calorifity whereas parameters of blast rate increase and static pressure growth in a gas generator have the most positive effect among the controlling factors. Aspects concerning the increase in loss of the produced gas that may reduce economic efficiency and environmental safety of underground coal gasi-fication have been considered as well. Using the results, we improved the UCG technology by using the condensing products of gasification in the overburden.

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