Method of determining the gas capacity of coals and the gas-bearing capacity of seams in the mining zone based on the rate of gas evolution

Abstract

where I is the rate of gas evolution from coal after its separation from the mass, cm3/min �9 g; I0 is the rate of gas evolution from coal at the moment of its separation from the mass, cm3/min- g; t is the time that passed from the moment of separation of the coal from the mass, rain; and k is a coefficient characterizing gain size, gas capacity, gas permeability, and other properties. The coefficient k is determined by the formula