Robert Cummings, P.E. - Construction & Contractors - Votech Education - Education

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Expert Profile: Robert Cummings, P.E.

Expertise: I can answer questions related to rock blasting, rock and soil excavation (such as tunnels and highway cuts), stability of such excavations, and foundations in rock and soil. I can also answer questions related to geology and mining.

Experience in the area
20+ years as a geotechnical engineer and minerals engineer for mining. Active consulting practice in rock blasting, geotechnical engineering, and rock mechanics for heavy construction.

Organizations
Society of Mining Engineers, Association of Engineering Geologists, and International Society of Explosives Engineers.

Publications
Mining Engineering, AEG Bulletin.

Education/Credentials
MS Geological Engineering

Ask a Question	View Past Answers	View Ratings

Average Ratings
Prestige Points: 2120
Knowledge	9.88 Best of the best
Clarity of Response	9.92 Best of the best
Timeliness	9.89 Best of the best
Politeness	9.97 Best of the best
Number Of Questions (in Past 24 Hours)		0
Max Questions to be Asked (in 24 Hour period)		5
Total Questions (since joining AllExperts)		207

Recent Reviews from Users

Knowl	Clarity	Time	Politeness	Date
10	10	10	10	08/28/08
10	10	10	10	08/20/08
10	10	10	10	08/14/08
10	10	10	10	08/06/08
10	10	10	10	08/11/08

User Comments

Thank you very much! all above ratings are 10 The geotech has been contacted Maybe we will get back to you again when we see the result. ct
(chris on 08/28/08)

Thx - this looks like a good starting point.
(Michael on 08/20/08)

Fast, honest, willing to help, great expert resource and I really appreciate his help.
(Christian on 08/14/08)

Thx for the quick response!
(Calvin on 08/06/08)

Thank you so much for the speedy response. Now all I have to do is get the City of Baltimore to cooperate with your advice. That's not gonna be as sim
(Deborah on 08/11/08)

View All Comments

Ask a Question	View Past Answers	View Ratings

Recent Answers from Robert Cummings, P.E.

2008-09-01 method to dig and break rocks with excavator: Depending on the size of the excacvator, there are attachments that will either break rocks directly (hoe-ram or impact breaker) or turn the excavator into a drill (John Henry, TEI Rock Drills) so that...

2008-08-30 excavating and backfilling: Most wet sand-silt-gravel mixes will weigh in the neighborhood of 135 pcf if compacted and 125 pcf if in the native density state, so there is a significant difference with lightweight backfill, as you...

2008-08-28 Vibration Monitoring: I can see why you are confused about the vibration specification. From what you sent it looks like they have two criteria, an acceleration-based criterion over the range of 5-15 Hz, and a sound-based...

2008-08-24 Retaining wall: I don't know that I have ever heard of a wooden retaining wall. I am familiar with soldier pile walls that are composed of vertical steel (rarely concrete) beams into which are set timber boards (called...

2008-08-20 Rock Removal: Breaking rock always involves the input of energy sufficient to overcome whatever bonds are holding the rock together. The question reduces to how to introduce this energy in the most efficient manner...

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