Research and application of advanced treatment technology of three-dimensional intersecting roadway under deep fractured surrounding rock conditions
With the transition from shallow coal mining to deep coal mining,the engineering problem of loose and broken surrounding rock near the three-dimensional intersecting of the excavation working face in deep high stress environments has become a difficult prob-lem that affects the rapid excavation and later maintenance of the roadway.Considering the existence of cracks in the surrounding rock of the roadway,the integrated support technology of grouting advanced treatment and hollow grouting anchor cable anchoring was adopted.The research results show that in fractured rock mass,the end anchoring method is prone to debonding failure,and the pre tensioning force of the anchor cable does not meet the design requirements,and it is impossible to control the shallow surrounding rock through the adhesive anchoring force.As the anchoring length increases,the anchoring force significantly increases,and the control effect on the shallow fractured surrounding rock is also better.Based on the above research,this paper puts forward the integrated support technology of grouting advanced treatment and hollow grouting anchor cable anchoring for over exposed roadway under the condition of fractured surrounding rock.Through industrial tests,the deformation of the roadway has been effectively controlled.
deep deep fractured surrounding rockadvanced treatmentintegration of anchor and groutingthree-dimensional intersecting roadway
万方数据
维普
