Abstract: Construction of the retaining wall is one of the necessary processes of waste fill mining methods,and the quality of the retaining wall relates to the safety and efficiency of filling.At present,a variety of retaining walls are applied in mine,but there are many defects among these retaining walls,such as high labor intensity,insufficient flexural capacity,long installation time,low repeat utilization,running sand easily,slurry leakage and so on.In order to overcome the defects of the existing retaining wall,and improve the security and efficiency of the retaining wall,a combined filling retaining wall that is elastic and conveniently disassembling is put forward.Based on theoretical calculation,the reasonable size of retaining wall components was chosen.At the same time,the numerical analysis software is applied to make simulation calculation and optimize the structural parameters.The calculation results show that the combined-type filling retaining wall has the advantages of higher strength,higher filling height and reuse,compared with other retaining wall.It can raise the building speed of the retaining wall significantly,improve the building quality and repeated utilization of the retaining wall,and prevent the running sand and slurry leakage accidents effectively,thus raising the efficiency of filling.

Key words: Mine-filling, Combined type, Retaining wall, Gasbag, Numerical simulation