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VARI-STEM -- DECREASED FLY ROCK

http://www.varistem.com/guide_04_fly-rock.html

Improved Blast Performance - Savings In Downstream Costs. Keeps blast energy inside the rock, which greatly reduces the amount of force ejected from the blast hole - and in turn, greatly reducing the amount of fly-rock. The dangers of fly-rock. Are well known. And in many locations, the level of fly-rock is strictly regulated by local and federal laws. Effective blast emission management should be of critical importance to all operations that are exposed to the hazards of uncontrolled fly-rock.

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VARI-STEM -- Size Chart

http://www.varistem.com/varistem_size_chart.html

Improved Blast Performance - Savings In Downstream Costs. 2" - 1 5/8". 51 - 40 mm. 42 lbs [19.1 kg]. 2 " - 2 1/16". 64 - 52 mm. 38 lbs [17.2 kg]. 3" - 2 9/16". 76 - 65 mm. 45 lbs [20.4 kg]. 3 " - 3 1/16". 89 - 77 mm. 32 lbs [14.5 kg]. 4" - 3 9/16". 101 - 90 mm. 35 lbs [15.9 kg]. 114 - 100 mm. 38 lbs [17.2 kg]. 127 - 115 mm. 28 lbs [12.7 kg]. 140 - 128 mm. 29 lbs [13.2 kg]. 152 - 141 mm. 26 lbs [11.8 kg]. 165 - 153 mm. 22 lbs [10.0 kg]. 177 - 166 mm. 25 lbs [11.3 kg]. Available sizes of stemming plugs.

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VARI-STEM -- Pattern Spread - Holcim Aggregate

http://www.varistem.com/study_03_pattern_spread.html

Improved Blast Performance - Savings In Downstream Costs. Pattern Spread - Holcim Aggregate. This extensive report shows the blast containment achieved with the Varistem allows pattern spread for major drill cost savings. Holcim Cement. Conducted this study at their quarry in St. Genevieve, MO. This facility is the largest cement producing plant in the US, producing over 4 million metric tonnes of cement per year. The added fragmentation performance represents a reduction of 11.6 percent.

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VARI-STEM -- Pattern Spread - SURALCO LLC

http://www.varistem.com/study_03_pattern_spread2.html

Improved Blast Performance - Savings In Downstream Costs. Pattern Spread - SURALCO LLC. This study showed pattern spread of 25% for similar fragmentation to reduce drilling cost. Also, fly rock and noise control opened mine reserves previously closed due to community concerns. Pattern Spread Study #2. That the 25% increase in confinement can lead to a pattern expansion of 25%, resulting in the same fragmentation. The following questions are researched in this study:. It was concluded that even with a pat...

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VARI-STEM -- Stemming Performance Study

http://www.varistem.com/study_04_stemming_performance.html

Improved Blast Performance - Savings In Downstream Costs. Conducted this study to quantify the effectiveness of VARI-STEM using Different Types of Top Stemming Material. And the Varistem Videos. Used drill cutting chippings. Just think of the potential cost savings! Quarries, contractors and blasters could potentially eliminate, or at least reduce, the volume and expense of crushed stone stemming, allowing them to use less expensive drill cuttings for stemming. For a newer version of this player. As you ...

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VARI-STEM -- Tunnel Blasting Study

http://www.varistem.com/study_06_tunnel_blasting.html

Improved Blast Performance - Savings In Downstream Costs. Tunnel Based PCB Collection System Using VARISTEM Stemming Plugs. International Society of Explosive Engineers ( ISEE. Explosive Operations for Constructing a Tunnel Based PCB Collection System. In all holes to help retain stemming and reduce overpressure was also recommended. Lastly, a shaft cover was designed to contain any fly rock to the shaft and mitigate overpressure. Pattern Spread Study #1. Pattern Spread Study #2. A Division of MOCAP.

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VARI-STEM -- Field Studies

http://www.varistem.com/varistem-field-tests.html

Improved Blast Performance - Savings In Downstream Costs. Mining Resource Engineering Ltd. Tested stemming movement and ejection velocity. The longer time to stemming movement and the lower stemming ejection velocity means more blast energy is retained in the bore hole. Energy is directed into the rock, and not lost into the air. There is better fragmentation, less flyrock, and a reduction in noise. Using VARI-STEM with standard rock stemming, stemming movement was slowed 100%. Extended the MREL tests.

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VARI-STEM -- INCREASED PATTERN SPREAD

http://www.varistem.com/guide_03_pattern-spread.html

Improved Blast Performance - Savings In Downstream Costs. The blast energy which is conserved by the VARISTEM. Permits you do do a lot more with a lot less. Multiple studies have demonstrated that the VARISTEM allows blasters to increase their pattern spread by 10% - 25%, without. Any reduction in fragmentation. The cost benefit of increased pattern spread is easy to see. 10% - 25% fewer holes drilled, 10% - 25% less explosives used - both of which can greatly help reduce the expense of blasting.

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VARI-STEM -- VARISTEM Guide to Safe and Efficient Blasting

http://www.varistem.com/efficient-blasting-methods.html

Improved Blast Performance - Savings In Downstream Costs. VARISTEM Guide to Safe and Efficient Blasting. VARISTEM Guide to Safe and Efficient Blasting. There are several different ways that the VARISTEM. ANFO Blasting Tips and Tricks. VARI-STEM - VARISTEM Guide to Safe and Efficient Blasting. Achieves up to a 27% fragmentation improvement while also. Click here for more information. Click here for more information. The blast energy which is conserved by the VARISTEM. Any reduction in fragmentation. Using...

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VARI-STEM -- Varistem Videos

http://www.varistem.com/varistem_videos.html

Improved Blast Performance - Savings In Downstream Costs. Demonstrations of VARISTEM Stemming Plugs. Demonstration of ANFO detonation with Stemming Plugs. Drill Dust as Stemming. Drill Cuttings used as Stemming Material. The following video contains two separate clips, each which demonstrates the VARISTEM's ability to confine the blast force inside the ore mass, which allows for greater ore fragmentation and ore milling savings, and less fly rock, noise, and dust. Drill Dust as Stemming. A Division of MO...