Destructive Testing of Wire Ropes at the Materials Testing Laboratory
The paper will outline the methods and test procedures including the evaluation criteria currently used at the Materials Testing Laboratory (MTL), Sudbury, Ontario, Canada, a laboratory approved by the Ontario Minister of Labour for the purpose of testing or examining mine shaft ropes or other hoisting appliances.
Also for Canadian mines the paper will suggest proposed criteria to be used at MTL for the evaluation of ropes used in "ultra-deep" single-lift shafts.
Most of the methods and test procedures currently used at MTL were adopted during the revision of the CSA Standard G4, Steel Wire Rope for General Purpose and for Mine Hoisting and Mine Haulage to be published in great likelihood by December 2000 or in year 2001. In this latest or sixth edition of CSA Standard G4, a new Clause 14 has been added outlining the requirements for in-service destructive testing of steel wire ropes for mine hoisting applications.
The existing fifth edition of CSA Standard CAN/CSA -G4-92, which is intended for the manufacturing of new ropes, includes requirements for raw materials and construction features for round strand and flattened strand rope, and locked coil rope in bright and galvanized finish.
Destructive testing, Breaking Load Test, Aggregate Breaking Load, Mtallographic Examination, DEEP SHAFTS, South African Standards, Mine Shaft Rope, Torsion Test, Evaluation Criteria