Abstract: In this paper, to obtain the stability characteristic and control countermeasure of chamber group surrounding rock in complex structural area, taking the chamber group in pump room of No.42 mining district in Peigou Coal Mine as example, the loosen zones of chamber group surrounding rock were detected by geological radar and drilling peep instruments. Additionally, FLAC was used to analyze the influence of horizontal tectonic stress on plastic zone layout of roadway surrounding rock, as well as the influence of chamber group structural characteristic on its own surrounding rock stability. Based on these, the cooperating support of frame and anchor cable, and the bolt-mesh-anchor supporting technology for roadway floor were put forward according to the lithological characteristics of chamber group. The industrial results show that chamber group can be effectively maintained after adopting the rational support scheme.

Key words: complex structural area, chamber group, loosen zone of surrounding rock, cooperating support of frame and anchor cable, numerical simulation