Question

The type of wire ropes used as Guide ropes in winding is

• A. Stranded rope with FC
• B. Non stranded rope
• C. Stranded rope with steel wire core
• D. IWRC

Hint:

Think about the function:
- Hoisting ropes need to be flexible to bend around drums $\rightarrow{}$ Stranded.
- Guide ropes need to be smooth and rigid like a rail $\rightarrow{}$ Non-stranded (Locked Coil).

Answer 1

The Correct Option is B

Step 1: Understanding the Question:
The question asks to identify the specific type of wire rope construction used for guide ropes in a mine shaft winding system.

Step 2: Detailed Explanation:

Guide ropes in a shaft serve to guide the cages or skips, preventing them from swinging or colliding with each other or the shaft walls.
They need to be rigid, have a smooth surface, be resistant to rotation, and have a long life.
-

Stranded ropes (A, C, D): These ropes are made of multiple strands twisted around a core (Fibre Core - FC, or Independent Wire Rope Core - IWRC).
Their twisted construction gives them a rougher surface profile and makes them prone to spinning under load.
While excellent as hoisting ropes due to their flexibility, they are not ideal as static guides.
-

Non stranded rope (or Full Locked Coil Rope): This type of rope is specifically designed for applications like guide ropes, track ropes for cable cars, and bridge suspension cables.
It is constructed with an inner core of round wires, overlaid with one or more layers of shaped, interlocking wires (often Z-shaped).
This construction gives the rope several key advantages for use as a guide rope:
1. A perfectly smooth, cylindrical outer surface, which reduces wear on the guide shoes of the cage.
2. A very high packing factor (more steel in the cross-section), making it strong and rigid.
3. It is inherently non-rotating or "non-spin".

Step 3: Final Answer:
The type of wire ropes typically used as guide ropes are non-stranded ropes, specifically full locked coil ropes.
This corresponds to option (B).