Abstract: In order to eliminate the problems of sectional coal pillar, improve the recovery rate of coal resources, taking Changcun Mine S511 and S510 adjacent faces as engineering background, the paper proposed the technology of section within the conveyer roadway construction of filling wall without coal pillar mining, analyzed the principle of filling wall without coal pillar mining technology, determined the filling wall construction method and key technology, gave the principle and process of filling wall construction parameters, adopted the FLAC^3D simulation software to analyze the influence rule of parameters change of filling wall on S510 return air roadway surrounding rock deformation and the overburden rock fracture extension, determined value of the filling wall height of 3.5 m, width of 1.8 m and intensity of 30 MPa to 35 MPa respectively. Field application results show that the construction of filling wall without coal pillar mining technology has good application effect; parameters of designed filling wall are reasonable, which ensures the safety and stability of S510 mining face and produces much more coal resources of 391 524 t.