Coal Seam Gas Occurrence and Flow Theory
Abstract
a guiding basis for preventing coal mine accidents. The gas underground in coal mines mainly comes from coal seams and coal formations,
and is also closely related to the origin of coal. There are generally two states of gas in coal seams, namely adsorption state and free state. The
coal seam gas content actually refers to the sum of the amount of adsorbed gas and the amount of free gas, and the size of its value is often
an important indicator to evaluate the coal seam gas reserves and whether it has pumping value. According to the current research results, the
main factors affecting the gas content of coal seam are: coal seam gas storage conditions, regional geological structure and mining work. On
the other hand, coal seam is a substance composed of pores and fracture structures, and the flow of gas in pores is mainly diffusion, and the
flow in the coal seam fracture system belongs to infiltration. In this paper, the occurrence and flow law of coal seam gas will be elaborated and
briefly analyzed.
Keywords
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DOI: http://dx.doi.org/10.70711/eph.v2i4.6887
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