Physical and Chemical Geotechnologies

Purpose

Scientific substantiation and development of energy-efficient low- waste technology for hydrocarbon raw materials extraction by changing its aggregate state by physico-chemical interference, taking into account the peculiarities of changing the geomechanical state of the environment to improve the completeness of the useful components extraction.

Methodology

The complex methodical approach, which contains the analysis of world and domestic experience in the field of thermochemical formation of hydrocarbon raw materials and hydrate formation, methods of mathematical statistics, conducting of analytical researches, computer simulation of the stress deformed state of rock massif, laboratory research were used.

Findings

The character of combustible and ballast gases concentration distribution depending on the type of blast supplied to the underground gasifier during underground coal gasification is established. The optimal parameters of the heat and mass balance of the gasification process are determined. A new dependence of gas hydrate accumulation from methane hydrate hydration and the change of thermobaric formation of gas hydrates from the methane-air mixture of degassing wells, depending on methane concentration, pressure and temperature parameters, was established. The regularities of the change of the destructive stresses influenced on wells stability depending on curved radius and changes in the geological and technical conditions of thin coal seams extraction by underground gasification technology are established

Practical implication.

The parameters of the work of energy-efficient three- component technological system on the base of the underground gas generator, heat recuperator and the cogeneration unit with the focus on the consumer’s specific product with minimization of waste accumulation are considered. The innovative technological scheme of gas hydrates creation in the conditions of coal mines is developed.

Keywords: underground coal gasification, gas generator, gas hydrates, coal

References

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