Goaf filling cementing material, filling test block and preparation method thereof

The invention discloses a goaf filling cementing material, a filling test block and a preparation method of the goaf filling cementing material. The goaf filling cementing material comprises the following components in percentage by mass: 50-70% of stone coal vanadium extraction tailings, 5-20% of stone coal vanadium extraction neutralization slag, 0-15% of smelting slag, 10-30% of cement clinker and 2-8% of an exciting agent. The filling test block further comprises a full tailing filling material and tap water, the mass percentage of the tap water is 18-30%, and the mass ratio of the goaf filling cementing material to the full tailing filling material is 1: 12-1: 4. The gelling material for filling the goaf takes the stone coal vanadium extraction tailings as a main raw material, can be applied to mine tailing filling nearby, is beneficial to large-scale and stable absorption of the vanadium tailings, avoids the problems caused by tailing accumulation, and plays a positive role in green development of mines