- Blast Force Containment
MREL (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% and stemming ejection velocity was reduced 44%.
- Fragmentation Size
DBA Consulting extended the MREL tests to provide quantifiable data on VARI-STEM® performance in Increasing Rock Fragmentation, Improving Crusher Throughput and Blast Control.
- Pattern Spread Study #1
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.
- Pattern Spread Study #2
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.
- Stemming Performance
DBA Consulting conducted this study to quantify the effectiveness of VARI-STEM® using Different Types of Top Stemming Material.
- Mine Crusher Output
A 12-month study of crusher throughput as a comparative measure of fragmentation, conducted by the University of Mines and Technology, Tarkwa, Ghana.
- Tunnel Blasting
Tunnel Based PCB Collection System
Using VARISTEM Stemming Plugs
Studies which demonstrate Varistem's effectiveness
Measurements of blast performance