CHINA MINE ENGINEERING

The reasons for the abnormal supporting force and the abnormal sound from the support in the 2603 working face of a mine are analyzed by numerical simulation and field stress monitoring, and the treatment measures are formulated. The results show that after grouting solidification for fault area by using a 1000-meter directional drill, the support pressure of the working face basically tends to be stable without large fluctuation. The study results have guiding significance for the control of coal wall instability in other mines.