Research on Mining Area Optimization Design of Pingshuo Jinggong No.3 Mine
Aiming at the poor coal resources occurrence in the western part of the No.2 mining area during the mining process of Pingshuo Jinggong No.3 Mine,which led to problems of a shorter mining life and tight replacement of working faces,the mining and excavation arrangement of the No.3 mining area is optimized and designed from the perspectives of construction work quantity and economic benefits.Two optimization design schemes are proposed:scheme 1 maintains the existing mining area roadway arrangement way unchanged and adds a dedicated air intake roadway for the No.4 coal seam;Scheme 2 changes the original No.3 mining area north-south arrangement of the main roadway to an arrangement towards the east of the main roadway in the east slope synclinal axis part.The 4th coal and the 9th coal in the No.3 mining area are centrally arranged,and the roadway in the mining area is arranged in the 4th coal.By comparing and analyzing two mining and excavation arrangement schemes,it is found that scheme 2 can maximize the utilization of existing well roadway engineering,with the advantages of less engineering quantity(reducing 1736 m),shorter construction period(shortening the construction period by about 6 months),lower investment cost(reducing 49.3784 million yuan),easier safety management and so on.Therefore,scheme 2 is ultimately selected as the optimization scheme,the research has guiding significance for solving the problem of tight replacement of working faces.
mining area optimizationmining and excavation arrangementscheme comparisonclose distance coal seam
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