A method of prediction of coalbed methane resources in the production areas of the mine field

摘要

Method prediction of coalbed methane resources in the recessed portion of mine field, comprising determining the coal reserves in formations methane reservoirs in the coal-bearing formation and chipped in the longwall coal and setting the angles of discharge of the roof and ground rocks in the recess producing formation, characterized in that it further establish the degree of degassing developed contiguous and in coalbed sequences discharged production face coal-bearing formation, while taking into account the volume of the separated methane at the site, and the volumes of methane from coal n fin is determined according to the formula: R- coalbed methane resources i-th layer at the recessed portion, m; Z- coal i-th layer at a portion m; x- coalbed methane content natural, m / m; x recaptured methane content in residual longwall coal, m / m; M- distance from the producing formation to the i-th Approaches, m; M- limiting distance of adjacent unloading coal seams at excavation sites, m.