Composite karst stratum grouting and water plugging reinforcement material as well as preparation method and application thereof

The invention relates to a composite karst stratum grouting and water plugging reinforcement material and a preparation method and application thereof, and belongs to the technical field of grouting materials. The material comprises the following components in parts by weight: 53-68 parts of coal gangue, 15-20 parts of cement, 0-10 parts of clay, 1-2 parts of bentonite and 4-6 parts of an alkaline activator. According to the preparation method, mixed slurry and the alkaline exciting agent are injected through a double-liquid grouting technology, so that the mixed slurry and the alkaline exciting agent are mixed at a grouting hole. The coal gangue is used as a main material, and a small amount of cement, clay and bentonite are used as auxiliary materials. The plugging agent has the advantages of being good in volume stability, low in manufacturing and using cost, easy to prepare, capable of being pumped for a long distance, capable of effectively plugging a grouting area and the like. 本发明涉及一种复合岩溶地层注浆堵水加固材料及制备方