Research on coordinated control technology for deep high-level stress tunnels
MA Li
YIN Shuaifeng
LIU Zhigao
Abstract：Based on the engineering background of 11 coal track roadway in Zhujixi Coal Mine,the coordinated control technology of"Grouting reinforcement is combined with high strength and high prestress anchor and borehole pressure relief"is proposed by theoretical analysis,numerical simulation and other methods combined with the actual field conditions and applied in the field.The results show that the deformation of roadway sur-rounding rock is mainly affected by the maximum shear stress,and the order of influence on the stability of roadway surrounding rock is:tectonic stress;Depth of roadway;Support density t;Support length.The opti-mized roadway reinforcement scheme is verified by numerical simulation.The maximum vertical stress of the roadway is 23.73MPa,the stress of the anchor cable is significantly reduced,and the plastic zone range of the roadway side and bottom is reduced.After the pressure relief of the borehole,the stress concentration zone is transferred to the area around the borehole,and the maximum stress is reduced to 22.5MPa.Combined with the field test results,the proposed restoration and reinforcement scheme can effectively control the deformation of surrounding rock in the chamber.
Keywords：deep alleynumerical simulationpressure reliefsurrounding rock controlroadway support
Publication Date：2023-12-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 1-7 )