RAISE BORING MACHINES – A COMPREHENSIVE REVIEW OF PERFORMANCE ...

Raise bore drill rig

Raise bore drill rig

A raise borer is a machine used in underground mining, to excavate a circular hole between two levels of a mine without the use of explosives. The raise borer is set up on the upper level of the two levels to be connected, on an evenly laid platform (typically a concrete pad). [pdf]

Large tunnel boring machine

Large tunnel boring machine

The name Bertha, after Seattle's first female mayor, , was chosen by a panel (that included the Governor and Transportation Secretary) from 150 submissions from kindergarten through 12th graders, who were asked to submit female names with Washington state heritage. The winning entry, which was submitted by two elementary schools in and , was selected in December 2012. [pdf]

Rigid 12v drill review

Rigid 12v drill review

Okay, so you picked up this kit (or are thinking about picking up this kit) for $129.99. My goal this time around is to look at some of the. . You can pick up the RIDGID R9000K 12V Drill and Impact Driver Kit for $129.99. That’s still a decent value when you look at where other brands are: 1. RIDGID 12V R9000K: $129.99 2. Skil 12V Brushless: $149 3. Milwaukee M12 Fuel 3497-22: $199 4. Makita 12V. . These are representative of the complaints that I found looking around online regarding the RIDGID R9000K Kit. I set out to see which of these I could replicate and confirm them or put them to rest. [pdf]

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