Research on Support Technology for Loose Surrounding Rock Wellbore
Aiming at the problems of poor stability of wellbore loose surrounding rock,easy occurrence of large deformation,surface collapse,and difficulty in support in Kekegai Mine,the stability mechanism and support technology of the topsoil section and weathered bedrock section of the wellbore are studied through a combination method of theoretical analysis and numerical simulation.The supporting forms and parameters of each section of the wellbore are studied to achieve the goal of long-term stability of the shaft and improving the excavation speed of the wellbore.Under the background of on-site application of the proposed parameter conditions,the wellbore deformation amount of the main and auxiliary inclined shafts in the open channel section and the comprehensive excavation section is within a controllable range.