Detonator magazine separation distances in AS2187.1

This table shows separation distances

Tacit knowledge refers to the knowledge, skills, and abilities an individual gains through experience that is often difficult to put into words or otherwise communicate.

Examples of tacit knowledge include:

 - Drill and blast engineers understanding of the relationship between short holes and hard dig.

 - Drill supervisors ability to optimise drill movements on the bench

 - Drillers ability to deal with soft and broken ground

The tag board records all personnel in an active mining area.

The tag board is used to confirm mine evacuations and blasting clearances.

Tamping is the act of ramming the loaded column with a wooden or plastic tamping stick. This has the effect of increasing the diameter of packaged explosives and the amount of explosives that can be fitted into the blast hole.

Note that any packaged explosives containing a detonator (the primer) must not be tamped

The act of consolidating stemming material or pressing explosive cartridge in a drill hole.

Moving in a straight line, away from a curve.

The technical data sheet (TDS) for an explosive typically contains information about the following:

• Description: Physical description of the product, including dimensions and mass where applicable.
• Safety and Sensitivity: Guidelines for storage, handling and use.
• Application and Compatibility: What they are designed to do and what other systems and products are suitable for use with the product.
• Recommendations for use: How the product should be loaded and fired.
• Packaging: Case counts, box sizes etc.
• Storage Requirements: Magazine, shelf life.

Note for health and safety information the Material Safety Data Sheet provides comprehensive information.

Throw or heave is the amount of projection or movement of the rock mass from in-situ to final position.

ThrowMAX is a Heavy ANFO supplied by Downer Blasting Services.

A preformatted risk identification card completed at the start of an activity.
The card generally contains a generic series of questions about the commonly present risks such as, Can I fall?

A common example of this is the 'Take 5' system.

The resistance of explosives to temperature effects depends on the type of explosive, the temperature the explosive is exposed to and the amount of time.

Timing contour plots or relief maps are used to analyse timing for a blast.

The plots show equal firing times at specific intervals.

The spacing between contours is an indication of relief.

Relief is calculated in terms of milliseconds per meter (ms/m)

For example where the 100ms and 200ms contour lines are 8 meters apart the relief is 100/8 = 12.5 milliseconds per meter.

Where contours are close together timing is slower with increased relief.

Note that direction of movement of the fired material is generally at right angles to the contours.

 Trinitrotoluene, TNT, or more specifically, 2,4,6-trinitrotoluene, is a chemical compound with the formula C6H2(NO2)3CH3.
This yellow-colored solid is best known as a useful explosive material with convenient handling properties.
The explosive yield of TNT is considered to be the standard measure of strength of bombs and other explosives.

The junction of the face and the floor. Also, unbroken rock remaining at the junction of the face and floor.

A top fire percussion detonator is designed to function without any electrical connection.

Fires from the top of the gun.

Owen Oil Tools’ Resistorized Bridge Detonators are designed to detonate when an electrical current greater than 0.2 amps is applied. The 008 Top Fire Detonator is a resistorized electrical detonator manufactured to API RP-67 recommendations and employs a 51 Ohm resistor in the firing circuit. It is designed to be used in hollow steel carrier or scalloped gun systems in a top-fire application where the detonator has a directional output designed to initiate a bi-directional booster.

Tramp Material (Also known as Foreign Bodies) not intended to be present in a process (such as bolts, nuts, gravel, etc), that can have an adverse effect on the process and may cause an undesired event or deviation from the design intent.

A figure with two parallel sides.

The surface line of detonating cord or signal tube between connecting blast holes.

Signal tube based unit which provides connection and delay from one blast hole to the next.

Detonator designed to initiate tube cutting charges.

A conveyor in a tube. Used in reload areas to load AN into MPU's.

An alternative to an auger with less maintenance.