关键词: 坚硬厚顶板, 动压巷道, 采动应力, 锚杆支护

Abstract: In view of the strong ground pressure behavior of roadway under the condition of shallow and deep hard thick roof, the evolution law of full cycle mining stress before and after mining and the evolution characteristics of deformation and failure of roadway surrounding rock were studied by using a variety of field measured data. The results show that the evolution law of full cycle mining stress before and after mining in the working face shows significant stage change characteristics. The influence of mining in the leading stage is small, and the ground pressure in the lagging stage is strong. The stress on the bolt at the lower part of the coal pillar wall is the most significant, with a maximum increase of 17.3kn. The vertical stress of the coal pillar changes most strongly in the lag working face stage, and the peak stress is mainly distributed within the range of 8~14m of the coal pillar. The evolution law of the coal pillar stress is that the goaf side gradually transfers to the auxiliary haulage roadway, and the peak stress of the coal pillar finally stabilizes at 10.4mpa. When the lag working face distance is greater than 405.6m, it tends to be stable with the movement of roof rock layer, and the change of mining stress is also gradually stable. Combined with the deformation characteristics of auxiliary haulage roadway under mining stress, the control idea of strengthening support in weak links is put forward, and reasonable roadway support countermeasures are formulated, in order to provide some guidance for surrounding rock control of dynamic pressure roadway under similar conditions.