Research on composite insulating sprayed concrete material for rock roadway

Taking the insulating concrete in thermal insulation materials as a start and from the perspectives of foamed concrete and lightweight aggregate concrete, ceramsite and polystyrene particles are selected as aggregates, with aluminum powder paste used for foaming treatment, a new type of insulating anchor sprayed concrete material is fabricated by orthogonal experiment method, and its insulation performance and compressive strength are measured by the national standard. Consequently, a new formula with thermal conductivity of 0.139 8 W/（ｍ·Ｋ） is chosen, which is only equivalent to 1/12 of ordinary anchor sprayed concrete material. Based on its insulation performance, the Fluent numerical simulation software is utilized to simulate the thermal insulation effect of this new type of concrete under the condition of mine ventilation. The results show that compared with ordinary concrete, the temperature in the center of roadway is reduced by 8.8 ℃, which has a significant effect and good application and development prospect.