关键词: 深井热害治理, 围岩隔热材料, 锡尾矿, 固废利用

Abstract: To solve heat hazard in deep mining，by injecting a large amount of tailings base insulation materials into the surrounding rock of high-temperature shafts and roadways，the heat of the original rock is restricted from being transmitted to the air flow in the shafts and roadways，and supplemented by ventilation measures for cooling and heat dissipation，the goal of creating a suitable working environment is achieved. The research proposes to take solid waste resource tin tailings as the main raw material，design orthogonal experiments，prepare insulation materials for surrounding rocks in deep mine，and explore the effects of tin tailings，cement，aluminum powder，etc. on the mechanical properties，insulation effect and microstruc‐ ture of the materials. The results of scanning electron microscopy and nuclear magnetic resonance show that when the porosity is 14%，the compressive strength of the material is better. When the porosity is 12%，the material has a better heat insulation effect. The orthogonal test results show that the optimal ratio of the test raw materials is 60 parts of tin tailings，18 parts of cement，1 part of aluminum powder，and a volume ratio of 5% of glass microspheres. The compressive strength of the material reaches 0.8 MPa，and the thermal conductivity reaches 0.273 W/（K·m），which is 1/6 of the thermal conductivity of ordinary concrete. It has the advantages of fire resistance and flame retardancy，low cost，and simple construction，which can meet the needs of deep mine heat hazard control in Gaofeng Mine of Huaxi，Guangxi.

Key words: heat hazard control in deep mines, thermal insulation material for surrounding rocks, tin tailings, solid waste utilization