Abstract: There is certain correlation between the occurrence of rockburst and the activity of solid earth tides. In order to further prove triggered effect of solid tidal stress on rockburst, with Huating coalfield as research background, the relationship between rockburst occurring in the roof and the diurnal changes of the tidal has been analyzed through the Schuster inspection method. The results have shown that：1) The solid tidal stress has a significant effect on the occurrence of rockburst. There is a significant correlation between the frequency of rockburst occurrence and the vertical, the horizontal shear stress component of the tidal stress, the value of the P of Schuster inspection is less than that of the triggering threshold value 0.05. 2) The tidal stress has different effects on different levels of rockburst, and with the increase of magnitude, the occurrence of rockburst is controlled by gravity to tectonic stress. 3) For different types of rockbursts, the triggered mechanical function is different. For small and medium-sized rockbursts controlled by gravity, when tidal stress vertical component and the largest minimum horizontal component the rock burst occurs more easily, while the bigger rockbursts controlled by tectonic stress are opposite. 4) The rockburst activities can also cause the distortion of time sequence and shape in the borehole strain in related regional strata.

Key words: rockburst, tidal stress, correlation, trigger mechanism