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In consultation with MHEA members we have compiled a quick-reference glossary of common industry terms, definitions and acronyms. This jargon-busting guide will help to make the way we talk about our industry more accessible to all.

AAV

abbr. aggregate abrasion value

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Abrasion resistant materials

Used extensively in materials handling to resist wear within high flow areas.

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Acceptance Criteria

Set of procedures for accepting waste materials on site, including: list of types of materials accepted; methods (e.g. tests or controls) of acceptance; requirements arising from the Waste Management Regulations and the Duty of Care.

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ACOP

abbr. approved code of practice

A publication giving guidance on the implementation of requirements laid down in Regulations made under the Health and Safety at Work Act.

 

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Aggregate

Rock is extracted from the ground in the quarrying process to produce aggregate.

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Aggregate Screening

Aggregate is screened into the sizes required for immediate use, or for further processing within the quarrying production line.

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BCA

Abbr. British Cement Association.

The trade association for cement manufacturers in the UK and now part of the Mineral Products Association (MPA)

 

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Belt Cleaning System

A belt cleaner, or a group of belt cleaners and associated equipment (such as mounts and tensioners are located on one conveyor)

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Belt Conveyor

A flexible rubber endless belt, looped over a framework of rollers and pulleys that is used to transport material from a load zone to a discharge point.

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Blasting Gelatine

A high explosive; the most powerful commercial explosive, taken as the standard of explosive power.

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Blinding

Screened out fine material from the secondary crusher

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Bucket Elevator

A continuous line of buckets attached by pins to two endless chains running over tracks and driven by sprockets; alternatively, the buckets are attached to a rubber belt. Used for raising loose materials or slurries at high angles or vertically.

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Buckets

A receptacle on various machines, such as the scoop of a power shovel or the compartments on a water wheel, used to gather and convey material.

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Bulk

Size, mass, or volume, especially when very large.

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Bulk Density

The density of a material including any voids and water contained in it.

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Bulk material handling

An engineering field that is centered on the design of equipment used for the handling of dry materials such as ores, coal, cereals, wood chips, sand, gravel and stone in loose bulk form. It can also relate to the handling of mixed wastes.

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Bulk Mix

A mass of explosive material prepared for use without packaging.

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Bulk storage

An area in the warehouse set aside for storage of multiple pallets of a given product. Storage in warehouses of any large quantity of supplies, usually in original containers. The area within a facility or warehouse devoted to the placement of large items, floor stocking of pallets and reserve material to re-supply forward picking areas.

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Bulk Strength

The strength of explosive per unit of volume expressed as a percentage of the value of blasting gelatine or ANFO as standard.

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Camber

A convex curve of the belt

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Conveying

To take or carry materials from one place to another

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Conveyor Belt

A  length of flexible rubber belt that is stretched over a framework of rollers and pulleys and then made into a single piece by splicing its two ends together.

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Conveyors

One that conveys, especially a mechanical apparatus that transports materials

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Drag Conveyor

Material-handling system using bars or plates on chain to pull the cargo to the discharge point.

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Drive Pulley

The pulley connected to the drive mechanism of a conveyor belt.

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Dust Bags

Specially designed air permeable filter bags that trap and collect airborne dust from a material handling system.

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Dust control equipment

Equipment used to reduce or prevent the spread of excessive dust within a production process

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Edge Damage

Tearsand rips along the edge of a conveyor belt

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Elevator

A continuous line of buckets attached by pins to two endless chains running over tracks and driven by sprockets; alternatively, the buckets are attached to a rubber belt. Used for raising loose materials or slurries at high angles or vertically.

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Energy Factor

The amount of explosive energy required to break a unit volume of rock (MJ/m3) which may be used as a blast design criterion

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Epicyclic Gear

A system of gears in which one or more gear wheels travel round the inside or outside of another gear wheel, the axis of which is fixed

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Explosion Protection

Explosion protection is used to protect all sorts of buildings and civil engineering infrastructure against internal and external explosions or deflagrations.

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Face Profiling

A detailed three-dimensional survey of the quarry face.

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Feed rate

The amount of material flow that is being transferred on a conveyor at any give time, usually expressed in ‘tons per hour’

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Feeder

A device that feeds materials into a machine for further processing

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Fine Aggregate

Graded material which, in the case of concrete aggregate, is smaller than 4mm, and for road-making material is below 2mm.

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Gauge

The thickness of a belt or of its individual elements

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Generated Air

Airflow produced by rotating devices that feed the conveyor load zone.

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Gravimeter

An instrument used in gravity surveying to measure changes in the value of gravity over an area.

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Hardcore

Recovered stone, broken brick or the like which, when spread and compacted, can be used as a rough filling material.

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Head

The discharge end of a conveyor belt.

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Head Pulley

The terminal pulley located at the discharge point of a conveyor belt. On many conveyors, the head pulley is coupled to the drive motor to power the conveyor.

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Idler

A non-powered rolling component used to support a conveyor belt on either the carrying run or the return run.

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Lagging

A rubber, fabric, or ceramic covering applied to a pulley shell to improve belt traction against the pulley.

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Load capacity

The maximum total weight that can be handled by material handling equipment without sacrifice of any of the applicable published specifications of the equipment.

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Loading Chute

The enclosure that places the cargo onto the belts.

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Manometer

A device used for measuring the pressure of gases or liquids; on conveyors, used for measuring air flow.

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Materials Handling

The activities of loading, unloading, placing and manipulating material and of in-process movement.

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Mistracking

The off-centre travel of a conveyor belt.

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Operating Tension

The tension of a belt while running with a material load

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Oxidizer

An ingredient in an explosive or blasting agent which supplies oxygen to combine with fuel to form gaseous or solid products of detonation. Ammonium nitrate is the most common oxidizer used in commercial explosives

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Peeling angle

When a cleaner blade is tilted in opposition to the direction of belt travel.

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Pinch Valve

A pinch valve is a full bore or fully ported type of control valve which uses a pinching effect to obstruct fluid flow. There are a few types of pinch valves based upon application.

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Pulley

A rotating cylinder mounted on a central shaft that is used to drive, change direction of, or maintain tension on a conveyor belt.

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relief

A mechanism that allows an item to move away from an obstruction. These could include springs in the cleaning system – tensioner.

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Return run

The side of a conveyor belt that does not carry cargo, after the discharge, as the belt returns to the loading zone.

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Rotary Valve

A valve acting by continuous or partial rotation.

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Saddle

An additional short length of belting added to an existing conveyor belt.

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Screw Conveyor

A conveyor consisting of a central shaft with helical paddles or a complete helical screw rotating within a stationary tube or trough filled with the material being conveyed.

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Stackout System

A series of conveyors designed to carry material out into a storage area

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Tail End

The opposite end of a conveyor to the delivery end.

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TNT

A military explosive compound used industrially as a sensitizer for slurry-type explosives.

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Trough

The shape of a belt with the edges raised allowing it to carry more material.

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Upstream

In the direction of the places the belt has already passed, or back toward the loading point.

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Valley Angle

The angle between two chute walls created by the side wall joining with the back wall.

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Wander

Mistracking.

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