Abstract:

As the background of geological conditions of 20306 coal face in Gao Jialiang Colliery, multi-bases displacement monitoring device, anchor dynamometer and borehole stressmeter were used to detect deformation and stress of contact Lane and coal pillar, and UDEC was used to simulate distribution of deformation and stress in surrounding rocks of service gate with different coal pillar size. The results show that the peak of advanced abutment pressure is 20~30m ahead, the peak of side abutment pressure is about 22m away from coal wall, and the width of coal pillar should be 12m.

Key words: Near shallow seam, Side abutment pressure, Coal pillar size, UDEC