Our Technology

The success of the AutoStem Cartridge is a result of the harmless gas generation and ease of use during rock breaking, drilling and blasting.

Unique features include:

Self-stemming

The cartridge stems itself. Use requires no additional stemming effort by the operator. It is the world’s only drop-and-go cartridge.

Boosters

The AutoStem range is accompanied by a range of booster cartridges, enabling the operator to easily increase his charge.

Water tightness

Ensures efficiency in water clogged boreholes and in wet conditions

Vertical and horizontal holes

Cartridges can be used in any orientation, suitable for above and underground work

Tamping

The AutoStem Rock Breaking Cartridge removes the requirement for tamping from the operator by stemming itself upon initiation

Self Stemming
Unique features include:

Self-stemming

The cartridge stems itself. Use requires no additional stemming effort by the operator. It is the world’s only drop-and-go cartridge.

Boosters

The AutoStem range is accompanied by a range of booster cartridges, enabling the operator to easily increase his charge.

Water tightness

Ensures efficiency in water clogged boreholes and in wet conditions

Vertical and horizontal holes

Cartridges can be used in any orientation, suitable for above and underground work

Tamping

The AutoStem Rock Breaking Cartridge removes the requirement for tamping from the operator by stemming itself upon initiation

Self Stemming
Unique features include:

Self-stemming

The cartridge stems itself. Use requires no additional stemming effort by the operator. It is the world’s only drop-and-go cartridge.

Boosters

The AutoStem range is accompanied by a range of booster cartridges, enabling the operator to easily increase his charge.

Water tightness

Ensures efficiency in water clogged boreholes and in wet conditions

Vertical and horizontal holes

Cartridges can be used in any orientation, suitable for above and underground work

Tamping

The AutoStem Rock Breaking Cartridge removes the requirement for tamping from the operator by stemming itself upon initiation

Self Stemming
Unique features include:

Self-stemming

The cartridge stems itself. Use requires no additional stemming effort by the operator. It is the world’s only drop-and-go cartridge.

Boosters

The AutoStem range is accompanied by a range of booster cartridges, enabling the operator to easily increase his charge.

Water tightness

Ensures efficiency in water clogged boreholes and in wet conditions

Vertical and horizontal holes

Cartridges can be used in any orientation, suitable for above and underground work

Tamping

The AutoStem Rock Breaking Cartridge removes the requirement for tamping from the operator by stemming itself upon initiation

Self Stemming
Borehole Drilling Tamping Quarry

How it works

The AutoStem Cartridge requires no stemming and is simply dropped into a borehole by the operator. The initiating wire is then connected to the blaster’s firing cable and initiated by a conventional shot firer.

When initiated in a borehole, the proprietary compound in the cartridge ignites to produce high volumes of harmless gas at very high pressures. This gas then works against the rock from within the borehole, which is automatically stemmed by the actuation of the built-in stemming mechanism of the AutoStem Cartridge, causing fracturing, breaking and heaving of the rock (or concrete) structure.

When initiated in an unconfined environment, due to a lack in pressure build-up, the proprietary compound contained within the AutoStem Cartridge will not undergo its combustion reaction, rendering the AutoStem Cartridge entirely harmless if not used within a borehole.

A clearing area of 20m – 50m is recommended (there is minimal throw rock with the AutoStem Cartridge), and the rock can be immediately re-approached because there are no harmful gasses.

Non-Detonating Solutions (Pty) Ltd also supplies the AutoStem booster, which is a supplementary cartridge (of 60g or 100g), which can be used in conjunction with the AutoStem Cartridge in a borehole, to augment the total charge delivered to the rock. This simple application makes the AutoStem Cartridge very user friendly, leaving the end-result achievable completely up to the operator.

Safety

The AutoStem Cartridge offers unparalleled safety. Because the cartridges do not detonate, there is no fire, flame, spark or explosion caused. Classified by the United Nations under either UN 0323 and UN 0432, these cartridges are deemed safe for transport, even on a passenger airplane, and have a shelf life of 18 months.

Unlike conventional explosives, the AutoStem Cartridge emits no shockwave on initiation, which means that there is no potential for damage to existing surrounding structures, equipment or on-site personal. Because the initiation is very controlled, there is no flying rock, dust or harmful emissions.