Abstract: According to the problems of thickness of coal seam, the fault development of the working face, big deformation of surrounding rock, the paper studied the deformation control countermeasure of roadway surrounding rock through testing the loose circle by peering instrument and numerical simulation software. The results showed that the length of anchors could not meet the supporting requirements because the range of loose circle was increasing constantly under the influence of complicated geological conditions after the excavation of roadway. The roadway deformation in the roof and two sides decreased about 42.0% and 38.2% compared with supporting by the original supporting scheme after that the anchors in the left and right sides of roadway were lengthened to 2.4m and 2.2m, the distance between two rows was reduced to 0.8m based on suspension theory. It could effective control the deformation of surrounding rock.

Key words: peering instrument, loose circle, numerical simulation, suspension theory, deformation of surrounding rock