Study on Surrounding Rock Deformation Rule and Sectional Control Technology of Roadway with Strong Dynamic Pressure

To solve the difficult problems of mining and excavation replacing tension in one-way working face, the technology of roadway driving forward the face was proposed. The numerical calculation was used to analyze the distribution laws of the stress and the displacement field of 4102 air-return gateway in a mine in the driving process, and it was concluded that the the range affected by the strong dynamic pressure at the heading end of the gateway was -30 m to +80 m away to 4101 working face. Sectional control technology was used in the section affected by the strong dynamic pressure, including the combined support with high-strength and large-elongation bolts, cables anchors and wire mesh, the reinforcement of the narrow coal pillar with high moisture material and the roof support by using the individual props and articulated roof beams, which effectively controlled the deformation of the roadway forward the face and ensured the normal replacement and safe production of the working face.