Feasibility Study and Application of Parameter Adjustment for Rapid Excavation Support Under Complex Conditions of Deep Coal Roadways
In order to achieve rapid excavation of coal roadways and explore the feasibility of support parameters adjustment,the transportation roadway of the 1211 working face in Guqiao Mine was taken as the research object.FLAC3D numerical simulation and on-site verification methods were used to analyze the stress and deformation failure characteristics of the roadway surrounding rock under various support density conditions after excavation of the coal roadway.The results indicate that the coal roadway has the best support effect under the original support scheme(scheme 5),presenting the most suitable support density for the roadway.Through numerical simulation,it is found that the optimized support scheme(scheme 3)can achieve a peak vertical stress of 4.1 MPa,an average maximum displacement of 36.25 mm of the roof and floor,and a plastic zone height of 2.2 m.The support effect of scheme 3 is similar to the original support scheme,verifying the theoretical feasibility of the scheme.Implementation of support scheme 3 on site has favorable outcomes,with overall stability and small deformation of the roadway,which achieved notable economic benefits.
Complex conditions of deep mineRapid excavationFeasibility studySupport density
万方数据
维普
