Research on support selection technology for shallow buried close distance coal seam group working face
YAN Junjie
FAN Yu
SUN Lihui
Abstract：In order to ensure the safe and efficient mining of the working face of the shallow-buried close-distance coal seam group,the mining of the 3-1 coal working face under the close-distance 2-2 coal goaf in the Kunyuan Coal Mine of Shaanxi Shenmu Mining Area is taken as the engineering back-ground.The research methods of theoretical analysis,numerical simulation and similar simulation are used to analyze the reasonable support strength of the working face support during the mining of the lower 3-1 coal working face after the upper coal mining of the close-distance coal seam.The theoretical calculation of the support strength of the working face is 0.695 MPa.The numerical simulation of the support strength of the 3-1 coal working face is 0.4～0.77 MPa.The similar simulation of the support strength of the 3-1 coal working face is 0.45～0.78 MPa.The working resistance of the working face is greater than 7 435 kN,which is consistent with the field measured data.It shows that the existing support selection does not meet the support requirements,and the hydraulic support with support re-sistance of 8 200 kN can meet the support requirements of the working face.This study complements the research on the support option technology of the working face under the mining of shallow-buried close-distance coal seams,and provides a theoretical basis for the safe and efficient mining of shallow-buried close-distance coal seams in Shenmu area.
Keywords：shallow buried coal seamsmining of coal seamsstep rock beamsupport strengthsupport selection
Publication Date：2024-06-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 16-20,53 )