Abstract:

Abstract:In view of the situation that the mining roadway under pillar deformed and collapsed seriously and had obvious asymmetrical features, combining with some a engineering practice and utilized theoretical analysis and numerical simulation methods, section coal pillar mechanical model was established, the stress distribution law of the floor strata under the section coal pillar abutment pressure was studied, the asymmetric loading and the asymmetrical deformation of the 10-1051 mining roadway was analyzed, the theoretical guidance was provided for the supporting of the asymmetrical deformation mining roadway under section coal pillar, the research has important theoretical and practical significances for the surrounding rock controlling around the mining roadway under the section coal pillar.

Key words: section coal pillar, mechanical model, stress distribution, asymmetrical deformation, roadway support