Foaming agent for mining filling

The invention relates to a foaming agent for mining filling. The foaming agent is prepared from the following components in percentage by weight: 5-10 percent of alkylbenzene sulfonate, 10-20 percent of fatty alcohol ether sulfate, 2-8 percent of a foam stabilizer and 62-83 percent of water; and the components are uniformly mixed and stirred at normal temperature to prepare the foaming agent. The foaming agent is used for preparing a foam tail cementing filling material with good fluidity, the utilization of dressing tail can be improved, gravity-flow transportation of underground pipelines can be realized, water usage can be reduced, the problems of serious settling and separation of slurry and the like after a filling body is dehydrated can be solved, the strength of the filling body is improved, and the underground operation environment can be improved.