Tenders Are Invited For Construction Of A Ventilation Opening From The Grubenthal Longitudinal On Level Iv To The Lilienbach Transverse On Level Iii In The Wieliczka Salt Mine.

The Subject Of The Order Is The Design And Construction Of A Ventilation Opening From The Grubenthal Longitudinal Section, Position Iv To The Lilienbach Transverse On Level Iii In The Underground Workings Of The Wieliczka Salt Mine, Hereinafter Referred To As Mining Works. The Aim Of The Mining Works Is To Supply Air From Level Iv To Level Iii In The Lilienbach Transverse Area. The Ventilation Hole In Question Will Be The Main Fresh Air Flow Path For The Planned Decommissioning Works Carried Out At The Southern Border Of The Deposit On Levels Iii And Iv. The Subject Of The Order Will Be Implemented In Four Stages: - Stage I Including: Preparation Of A Technical Design Along With Technology For Mining And Drilling Works - Stage Ii Including: Reconstruction Of The Grubenthal Longitudinal Section Based On The Above-Mentioned Documentation At The Location Of The Drilling Site (Transport Of Equipment And Materials, Installation Of Devices, Supply Of Utilities Technologically Necessary For Drilling - The Bidders Own Equipment And Materials), Completed With Technical Acceptance. - Stage Iii Including: Cutting From The Lilienbach Transverse To Pos. Iii In Place Of The Location Of The Planned Hole. From The Prepared Drilling Site To Poz. Iv Drilling A Pilot Hole To The Drill Hole Located At The Lilienbach Transverse, Widening And Mining Protection Of The Drill Hole In The Location Of The Pilot Hole To The Dimensions Necessary To Widen The Ventilation Hole To The Target Width. - Stage Iv Including: Drilling A Hole At An Angle Of 90 Degrees With A Length Of No More Than 39 .0 M And Then Encasing It With Mutually Screwed Steel Pipes, Transporting The Excavated Material From Drilling, Liquidation Of The Drilling Site And Securing The Inlet To The Well. The Detailed Scope Of Implementation Of Individual Stages Is Described In Annex No. 2 To The Contract.