Abstract: To promote the application of wet shotcrete technology in mines and improve its supporting effect，three key factors of affecting pumpability，strength，and rebound rate of wet shotcrete were deeply investigated based on numerous indoor experiments and several years field experiences in wet shotcrete.The influencing factors for pumpability and strength of wet shotcrete were introduced in detail，including dosage of cement，strength of aggregate and its size composition，dosage of silica fume，type and dosage of fiber，type and dosage of accelerator and water reducer，and water-cement ratio etc..The internal relationship between rebound rate of wet shotcrete and water-cement ratio，dosage of accelerator，distance and angle of spray gun and drift surface were analyzed.The application of wet shotcrete in Banmiaozi gold mine showed that the rebound rate of wet shotcrete is 10% in general，its Uniaxial compressive strength (UCS) for 28 d is 36.2 MPa，and its flexural strength is 3.2 MPa.These indexes are considerably better than that of dry shotcrete.So，the wet shotcrete technology is the developing tendency of shotcrete.

Key words: Wet shotcrete, Pumpability, Strength, Rebound rate, Application case