Study on computing method of old goaf methane reserves

摘要: Based on the "three-zone" theory of relieved methane delivery existing scope old goaf was obtained.The height conductive zone and pressure relief were given by considering key strata structure.According to sources methane,reservation calculation model in built.The fracture calculated based geological condition K8108 working face.The results illustrate that workface are 115.3 m 157.7 respectively.Methane reservation face is predicted model.And finally,the 30.78 million m3 which validated material balance method.