Overview of Underground Mining Hoists

These flashcards cover the essential concepts of underground mining hoists, including their designs, advantages, disadvantages, and applications.

The critical piece of infrastructure that functions as the mine's elevator is called a __.

hoist

Modern hoists are typically driven by __ motors.

electric

The three principal types of hoists are the Drum hoist, the Friction hoist, and the __ hoist.

Blair multi-rope

The drum hoist operates by winding the hoisting cable onto a large __.

rotating drum

A double-drum hoist allows for __ hoisting, creating a more efficient system.

balanced

A disadvantage of the drum hoist is its high __ demand.

power

Friction hoists are most economical for mines with hoisting depths between m and m.

150, 1800

The friction hoist reduces required motor horsepower by up to __% compared to a drum hoist.

30

The unique feature of the Blair multi-rope hoist is the use of __ hoisting cables per conveyance.

two

The smaller cable diameter of the Blair hoist allows for a __ winding drum.

smaller

One major drawback of the Blair multi-rope hoist is its __ complexity.

mechanical

The Drum hoist has a maximum assumed hoist depth of __ m.

2000

The key limitation of the friction hoist is its inability to operate if the shaft bottom __.

floods

The design of the Blair hoist enables production hoisting from depths exceeding __ m.

2000