Influence of surface mountain load on mining pressure of shallow buried deep working face

In order to obtain the influencing law of mountain load on shallow buried deep working face, based on the measured data of in-situ ground pressure and the numerical simulation method, the loading mechanism of surface mountain on the working surface and its influence on mining pressure appearance were studied. The results show that there is a positive correlation between the mountain load and the mining pressure appearance in the working face, the greater the mountain load, the stronger the mining pressure appearance in the working face; influenced by the bearing and breaking characteristics of the bedrock layer, there is a lag distance between the load layer and the working face mining pressure, which is similar to the periodic breaking distance of the roof; the impact range of mountain area is much larger than its vertical range, when the working face enters and leaves the influence range of the surface mountain, the superimposed influence of the mountain load on both sides will cause the working face pressure to increase. Therefore, when the shallow buried deep working face enters and leaves the influence area of the surface mountain area, the support strength of the working face should be ensured and the working face should maintain a reasonable and rapid advancing speed.