Abstract: Aiming at the problem that the error existing in traditional fatigue cumulative damage criterion (Miner criterion) for fatigue life prediction is quite larger, in order to improve the prediction precision of fatigue life for solid-filling hydraulic support and to ensure a safe and reliable service process, a grey system model GM (1,1) is used to improve the traditional Miner criterion. Taking ZZC8800/20/38 six-column supporting solid-filling hydraulic support foundation as the object of study, the stress analysis of the base under dangerous conditions was carried out through ANSYS, and the fatigue life prediction of the foundation was carried out with the fatigue test. The results show that compared with the traditional Miner criterion, the prediction precision of the improved Miner criterion increases by 4032%, which provides an effective method for the fatigue life prediction of the solid-filling hydraulic support, and has a certain reference significance for its security service.

Key words: hydraulic support foundation; fatigue life prediction; grey system model GM(1,1); fatigue cumulative damage criterion; Miner criterion