Abstract:To prevent heat damage in deep mine, this project prepared a thermal insulation material for wall rocks that is cheap, green and efficient to improve hot and wet environment, which can promote the development of temperature-controlling technology. Based on the concept of solid waste recycling, this project chose tailings as the main material and carried out orthogonal experiment. Differences of mechanical properties and heat-shielding performance were analyzed, which were caused by the dosage of tailings, cement, vesicant and glass bead. Using SEM and NMR technology, internal relationship between porosity, pore distribution and mechanical properties, thermal insulation properties of the thermal insulation material were also analyzed. The results show that the optimum mass ratio of orthogonal experiment was that tailings: aluminium powder: cement was 60:1:18. The volume ratio of glass bead was 5%. There were 4 kinds of pores in the material. Total porosity was 12.9%. Heat conductivity coefficient of the material was 0.273W/（K.m）. Compressive strength of it was 0.80Mpa.The prepared material can mostly meet the heat-shielding need in deep mine.