Rectangular roadway surrounding rock deformation and failure control method

Abstract

The invention discloses a rectangular roadway surrounding rock deformation and failure control method which comprises steps as follows: 1), a roadway is excavated; 2), basic mechanical parameters of a surrounding rock are determined; 3), a roadway support scheme is determined as follows: roadway side unstability is judged, the caving arch rise is determined when the roadway side is in a stable state, the width of roadway side olistolith, the caving arch rise, the roadway side limit equilibrium area width, the maximum failure depth of a roadway bottom board and a horizontal distance between the maximum failure depth position and an adjacent roadway side wall are determined when the roadway side is in an unstable state, and a roadway support unit structure is determined; 4), a roadway surrounding rock support is constructed; 5), the next section is excavated, and the roadway surrounding rock support is constructed; and 6), the step 5) is repeated until all excavation and roadway surrounding rock support construction processes of the rectangular roadway are completed. The method is simple in step, convenient to implement and good in use effect, the roof caving and bottom swelling problems of the rectangular roadway can be effectively solved, and deformation and failure of the roadway surrounding rock can be effectively controlled.

Description

technical field [0001] The invention belongs to the technical field of roadway support, and in particular relates to a method for controlling deformation and damage of surrounding rock of a rectangular roadway. Background technique [0002] The basic assumptions of the basic theory of Platts caving arch are: ① There are many joints, fissures and various weak interlayers in the rock mass. , so the surrounding rock of the roadway can be regarded as a kind of loose body with certain cohesive force but weak tensile, flexural and shear resistance; ②After the roadway is excavated, if the support is not carried out in time, the rock mass at the top of the roadway will be Falling into an arch: when the two lanes of the roadway are stable, the initial caving arch will increase continuously with the development of the slump; if the two lanes are unstable, the arch span and arch height will increase at the same time; when the roadway buried depth H is greater than 5 When the arch span...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a method for controlling the deformation and failure of surrounding rock in a rectangular roadway in view of the deficiencies in the prior art above. Effectively prevent and control the problem of smearing, and can effectively control the deformation and damage of the surrounding rock of the roadway, avoiding the repair work of the rectangular roadway, and the construction cost is low

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