Study on the Deformation and Damage Characteristics of the Three Middle Sections of Coordinated Mining Roadway in Jinchuan No.2 Mining Area
In response to the study of the deformation and damage characteristics of the three middle sections of the coop-erative mining roadway in Jinchuan No.2 mining area,through on-site investigation,numerical calculation,and theoretical anal-ysis,the displacement change rule of the three middle sections of the cooperative mining roadway in the No.2 mining area,stress distribution characteristics,plastic damage range,and the causes of roadway deformation and damage are studied.The re-sults show that in Jinchuan No.2 mining area and three sections of the cooperative mining process,the middle section of the roadway deformation damage is the most significant,followed by the lower section of the middle section and the upper section of the smallest;different sections of the roadway deformation damage have regional differences;the upper section of the middle section and the middle section of the middle section of the roadway of the middle of the deformation damage are obvious,the lower section of the middle section of the roadway of the east and west of the deformation is significant;each section of the road-way deformation damage is obvious asymmetric;the deformation damage of sidewalls on the near-disturbed side of the roadway is more significant than that on the far-disturbed side;the synergetic mining disturbance,the ground stress,and the ore-rock condition are the main factors leading to the deformation and damage of the roadway.The study results can provide some theo-retical basis for the safety control of the three middle sections of the coordinated mining roadway in Jinchuan No.2 mine.
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