METHOD OF USING THE ACOUSTIC METHOD FOR DETECTING ZONES WITH INCREASED GAS RECOVERY
An equation has been obtained, which states that the propagation velocity of acoustic waves is related to the gas content of a coal bed. Based on this, the method of acoustics in wells for determining gas release is based, and with its help we conclude that it is possible to detect a zone with increased gas recovery. The source of acoustics that arises in mine conditions is associated with the technological processes of excavation of coal matter. The article reveals a relationship that establishes between the natural release of gas from a layer of coal matter with the amount of coal miners produce per day. It also establishes the relationship between natural gas emission and methane concentration. An analysis of the above reasoning showed that the range of the relative stress coefficient Kn is 0.8-3 and is compared with our parameter K, which is 0.5-5. From this follows the conclusion that if the value of the parameter K = VS/VP < 3, then the coal bed in the basin of the city of Karaganda is dangerous to accidental and sudden outbursts of gas and coal. In other words, such a layer of coal matter enters the zone with increased gas recovery.