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rockmech » rockmech.mst.edu
1006 Kingshighway, Rolla, MO 65409  - Phone:  (573) 341-4365  - Fax: (573) 341-4368  - Email:  rockmech@mst.edu

The Rock Mechanics & Explosives Research Center (RMERC), founded in 1964, provides research leadership in a broad range of scientific and engineering fields with emphasis on activities centered on or related to the mineral resource lease. 

The Center serves the mining and petroleum industries, the nuclear industry, geological science and engineering and the related wider industrial manufacturing community. 

A particular emphasis is to foster innovative and responsive research in rock physics and all fields of science and engineering that deal with rock, including energy production, mining, geology, geophysics, nuclear and related fields.

 Our current research is focused on three areas: 

 

Upcoming Events

Friday Graduate Gathering
3:30 - 4:30 p.m.  Conference Room
Rock Mechanics Facility
1006 Kingshighway

Friday  March 5, 2015

Presenter:   Dr. Catherine Johnson, Assistant Professor, Department of Mining and Nuclear Engineering

TITLE:  Fragmentation Analysis in the Dynamic Stress Wave Collision Regions in Bench Blasting

  Abstract: Possibly the greatest improvement in blasting in recent years is that of electronic detonators. The improvements related to safety and increased fragmentation have been invaluable.   There has been ongoing debate within the explosives industry regarding two possible theories for this. Shorter timing delays that allow interaction between adjacent shock waves or detonation waves, or the increase in accuracy associated with electronic detonators.   Results exist on the improved accuracy of electronic detonators over that of electric or non-electric, but data on the relationship between the collision of dynamic stress waves and fragmentation is less understood.  Publications stating that the area of greatest fragmentation will occur where shock waves collide exist, but experimental data to prove this fact is lacking. Small scale tests in concrete exploring the head on collision of shock (in the rock mass) and detonation (in the detonation column) waves with relation to fragmentation have been carried out.

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