Grouting material for ultrahigh-temperature gushing water treatment in underground operation and construction method

The invention provides a grouting material for ultrahigh-temperature water gushing treatment in underground operation and a construction method, and the grouting material is composed of the following components in parts by mass: 30-65 parts of a cement-based material; 20 to 60 parts of mineral admixture; 0-5 parts of a nano material; 0-10 parts of an expanding agent; 0.001 to 0.1 part of a cellulose thickening agent; the liquid dispersing agent accounts for 0.5%-2% of the solid mixing amount, the water-resistant dispersing agent is added, so that the novel grouting material has certain water dispersion resistance, and the coagulation time of the novel grouting material under different high-temperature and ultra-high-temperature water bursting conditions is accurately controlled by adjusting the cementing material components and the types and mixing amounts of the chemical additives; the target of high-speed, large-flow, short-time, accurate, timed and fixed-point blocking of the ultrahigh-temperature hot wate