Research Progress of Mechanical Properties of Fresh Concrete Under Low Temperature Dynamic Load in Mine Construction

In order to study the mechanical properties of fresh concrete under the coupling action of low temperature and dynamic load in mine construction, taking Tai Ge-miao mining area in Inner Mongolia as a reference, on the basis of collecting and sorting out relevant data at home and abroad, this paper introduces the characteristics and changes of mechanical properties of fresh concrete under the conditions of low temperature environment and freeze-thaw cycle in mine construction, and expounds the impact of freezing cycle on concrete properties in mine construction, The change characteristics of mechanical properties such as compressive strength and tensile strength under the coupled action of low temperature and dynamic load are summarized. After comprehensive analysis, the following conclusions are obtained: ⑴ The durability of fresh concrete will be seriously affected under impact load, and adding rubber and rubber fiber into concrete can improve the impact resistance and fatigue strength of concrete; ⑵ The durability of fresh concrete will be greatly reduced when it is subjected to alkali aggregate reaction, chloride ion reaction and carbonation;