Extinguishing method for coal gangue dump system

The invention provides an extinguishing method for a coal gangue dump system and belongs to the field of management and ecological environment recovery of mine wastes. The invention provides the extinguishing method which combines excavation extinguishing, ditching and fluid injection extinguishing, loess covering, massif stabilization, flexible water drainage ditch, flexible slope protection and plant recovery technologies to form systematic extinguishment and fire prevention. The extinguishing method is carried out according to the following steps: observing a fire behavior and distributing temperature measuring points to determine a kindling point; determining grain diameter distribution and the porosity; carrying out excavation extinguishing treatment on a combustion hole and carrying out massif slope cutting reforming; on the basis of the massif slope cutting reforming, carrying out fluid injection extinguishing on rough gangues exposed from the lower part of a coal gangue dump and a fire region exposed