A COMPARATIVE STUDY OF METHANE GAS COMPOSITION IN SOME COAL DEPOSITS OF MONGOLIA

This study selected 14 samples from the Tavan Tolgoi coal deposit and 19 samples from the Naryin Suhait coal deposit, totaling 33 samples, and the amount of gas composition was determined. In 33 samples taken for research, gas chromatography determined gas composition in the "Green Crown" LLC laboratory. This study aimed to determine the correlation between the methane gas composition of the coal seams of Tavan Tolgoi and Naryn Sukhait deposits, the coal seams' depth and thickness, the coal's chemical and physical properties, and the cracks in the rocks. For the above 2 deposits, the findings revealed that the composition of coalbed methane gas (Methane) contains up to 95% of methane gas, the gas composition varies depending on the physical and chemical properties of the rocks containing the deposit, coal structure, age, pressure of the layer, hydrogeological and geological conditions, and gas sampling. Shortly, it is believed that the standard methodology needs to be improved.