Research on mechanical characteristics of roof and stability mechanism of surrounding rock in gob-side entry retaining
Li Jianghua
Abstract：Based on the engineering background of gob-side entry retaining in the No.15202 working face of Erjing Coal Mine,the roof movement process and failure structure after mining were analyzed,the axial failure length,lateral failure length,and width of the plastic zone on the side of the actual coal body from a mechanical perspective were solved,a mechanical model was established for for the com-bination of the key block of the roof and the filling body,and reasonable supporting resistance of the filling body was calculated.On this basis,a numerical model was established to analyze the stability characteristics of the surrounding rock during the mining process from the perspective of the plastic zone,the feasibility of gob-side entry retaining was further verified.Finally,after conducting industrial tests on site,and the deformation of the surrounding rock was monitored.The results indicate that the maximum deformation of the roadway is 351 mm,ensuring safe and efficient production in the mine.
Keywords：gob-side entry retainingrooffilling bodymechanical modelplastic zone
Publication Date：2025-10-30
Online Publishing Date：2025-11-27(First online date of this platform, not the publication date of the document)
Pages：7( 8-14 )