Support technology of precise intervention surrounding rock structure of deep rock roadway
In order to effectively boost the quality of surrounding rock control in the deep soft rock roadway of a coal mine,this paper uses case analysis and field investigation method to study the support technology of precise intervention in the surrounding rock structure of deep rock roadway.First,the deformation characteristics and influential factors of deep rock roadway are analyzed to determine the main factors of deformation and instability in the roadway include weak strength of surrounding rock,large buried depth of roadway and problems in support mode.Secondly,the technical scheme of stable support is determined.Finally,the support scheme design for the roadway engineering in this case should be based on impro-ving the cohesion of surrounding rock and strengthening the overall angular friction of roadway rock.The research results show that the subsidence of roadway roof gradually increases in the initial stage after the completion of the supporting process,and gradually stabilizes when it increases to 36 mm.The displacement degree of the two sides of the roadway also showed a trend of increasing at first and then stable,and its proximity gradually increased to 67 mm.No significant surface deformation of surrounding rock was found during the period of two months,and the roof subsidence and the movement of two sides of the roadway in the case showed a gradual increase and then tended to be stable.
deep rock roadwaysurrounding rock structuresupport technologyroof subsidencetwo-side proximity
万方数据
维普
