TECHNOLOGY FOCUS - MECHANICAL ENGINEERING - Preferred Component: The apparatus includes a stimulation gas transfer element, a coal bed gas reservoir, clean coal bed bags, water transfer element(s), a water confinement well coupling element, a coal bed gas removal element, and a coal bed gas removal element coupler. It also includes a coal bed structure alteration element, which acts after a portion of the coal bed gas is removed from the stimulated coal bed reservoir.Preferred Process: The production well(s) is located at a centroid of ca. 40-320 acre tract of land. The water confinement well is located at a boundary of the production well drainage radius or at each corner of the square perimeter of the tract of land. The method involves determining a characteristic of the stimulated coal bed, calculating an appropriate amount of coal bed stimulation gas to produce coal bed gas containing less than 10 (preferably less than 4) % stimulation gas per unit volume under stabilized coal bed gas removal conditions, injecting the stimulation gas while avoiding disturbing the coal bed structure, and altering the water permeability characteristic of the structure by injecting the gas in a vicinity of the production well(s). The gas is injected with a pressure sufficient to reduce the water permeability of the coal bed. At least a portion of the water is excluded from entering the coal bed to reduce the permeability of the coal bed. The stimulation gas transfer element delivers the gas to the coal bed for 8-30 days. The coal bed has previously had coal bed gas removed prior to delivery of the coal bed stimulation gas to the coal bed. Removing coal bed gas from the reservoir involves removing gas from the water confinement wells. The water displacement perimeter is maintained by removing the water encroaching upon the water displacement perimeter. Establishing a coal bed gas removal rate, which is never less than the calculated desorption rate, involves removing the coal bed gas through the confinement walls. An appropriate volume of the stimulation gas is calculated based upon a characteristic of the coal bed.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Gas: The stimulation gas is nitrogen, carbon dioxide, or a gas less sorptive to coal than methane.Preferred Property: The stimulation gas has a pressure in a range which alters the permeability characteristic of the coal bed and which avoids disruption of the coal bed structure. It has a water displacement pressure not larger than hydrostatic pressure of the water coal bed, and sufficient to cavitate the coal bed.