Construction Works For Mining In Jsw S.A. Plants, Including: Mining Works Related To The Drilling Of The Haulage Cutting To Seam 405/2 – Stages Ii And Iii, Mining Works Related To The Drilling Of The B-2 Gallery In Seam 405/2 And Connecting Cutting No. 1 Using A Roadheader, N-2 Conveyor Cutting Item 1000 (From N-2 Conveyor To N-1 Ventilation Cutting Item 1000)