Abstract: To calculate the coalbed methane resources in the stable area affected by coal mining, firstly, based on the height of roof caving zone and the water conducting fracture zone, the depth of floor failure zone, and the limit gas emission width of coal seam around working face are studied, the calculation model and method of original CBM resources in mining influence area are established; secondly, the loss of coalbed methane resources in working face is calculated by using the prediction method of gas emission from the working face; finally, according to the principle of material balance, a method for calculating the CBM resources in mining stability zone is established.