Can Nonel tubing be used as a lowering line when loading a blast hole?

• A. Yes, always
• B. No, it may get damaged
• C. Only for small primers
• D. Yes, if reinforced

Answer: (B)

The reason why Nonel tubing should not be used as a lowering line when loading a blast hole is that it may be susceptible to damage. Nonel tubing is designed as a conveyance for detonating cord and is not robust enough to handle the stresses associated with being used as a lowering line under loading conditions. Using it in this manner could compromise its integrity, potentially leading to a malfunction or an unsafe situation during blasting operations.

In contrast, lowering lines require materials that can consistently withstand the weight and friction encountered during the loading process. Properly chosen lowering lines ensure not only the safety of personnel and equipment but also effective and reliable loading of the blast holes. Choosing the right equipment is critical to maintaining safety standards in mining operations.