Wildfire Season

Wildfire Season

Wildfire season is upon us and with it comes the need for increased safety precautions on the jobsite. The past two years we’ve experienced intense wildfire seasons in the Pacific Northwest and at MRD we do everything we can to prevent forest fires. In addition to...
Dust Control Systems

Dust Control Systems

Today we are going to discuss dust control for both drilling and blasting. Why are they important and how do they work? Let’s get into it. Drilling Dust Control Systems All the drills at McCallum Rock Drilling are equipped with two-phase dust control systems....
Inaugural Blasting Seminar

Inaugural Blasting Seminar

On Tuesday, February 19 McCallum Rock Drilling held our first ever Drilling and Blasting Seminar in Portland, Oregon. More than 100 professionals from the construction, timber, and commercial quarry industries came from all over Oregon and Washington to learn more...
Emulsion Blend Blasting Product and How it Differs from ANFO

Emulsion Blend Blasting Product and How it Differs from ANFO

Another option we have is to use an emulsion blend blasting product. This product, commonly referred to as “emulsion”, is essentially an ammonium nitrate solution mechanically mixed with other raw materials by a computer controlled system onboard a delivery vehicle...
Intro to ANFO and Blasting in the Pacific Northwest

Intro to ANFO and Blasting in the Pacific Northwest

For a majority of the blasting we do at MRD, we are either using ANFO (ammonium nitrate and fuel oil) or a bulk emulsion blasting agent. Both of these blasting agents have been in use for a long time and are used around the world every day. MRD is not unique in the...
Setting Yourself Up for a Safe Job Site

Setting Yourself Up for a Safe Job Site

One of the most important things we deal with every day but have not yet discussed on this blog is safety. If you ask some people, safety is best achieved through handbooks, checklists, and other resources widely available to the construction and mining industry. We...
Sub-Drilling Part 2

Sub-Drilling Part 2

When looking to establish the elevation mentioned in part 1, we are not concerned about the location of the bottom of the hole, we are concerned where the craters from neighboring holes intersect. Where these craters intersect is where we want the desired grade to be....
Sub-Drilling Part 1

Sub-Drilling Part 1

In this two part post we are going to talk about sub-drilling. What is sub-drilling, why we do it, when we do it, and how much we do it. When explosives are detonated, they are expanding rapidly and are ultimately going to take the path of least resistance. This is...
Vibration and Seismographs

Vibration and Seismographs

One fact of life that we as commercial quarry blasters must accept is we at some point will need to deal with our neighbors in the community. Seismographs are a tool we rely heavily on to protect our neighbors. Our seismographs are equipped with electromagnetic...
Borehole Deviation – Part II

Borehole Deviation – Part II

Why is borehole deviation so important? If the holes are off just a couple of feet will it really make that big of a deal? The answer is a resounding YES. We design blasts on the surface of the material. We lay the holes out, measure the area, mark the spots where the...

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