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In order to further study Huoerxinhe coalmine 3207 large mining height faces rib spalling and complete the control management work, the laser rangefinder and visual observation method were used to observer the mining faces rib spalling and failing. The date(rib spalling depth, height, daily spalling range and so on) were recorded, and the main reason for 3207 working face spalling was analyzed. The result shows that Huoerxinhe coalmine 3207 large mining height faces rib spalling has three kinds of form that coal upper spalling(53%), middle upper spalling(44%) and whole coal spalling(3%).3207 mining rib spalling failure mode is mainly shear slip, and the working face cycle pressure has a greater impact on the stability of coal wall. The geological structure, roof and floor nature, mining height and working face advancing rate are the major cause.

Field Observation Research on 3207 Large Mining Height Faces Rib Spalling in Huoerxinhe Coalmine