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Any Rock Crushers / Rock Drillers Here? Update **FINAL**

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Any Rock Crushers / Rock Drillers Here? Update **FINAL**

Old 04-19-2013, 03:03 PM
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Default Any Rock Crushers / Rock Drillers Here? Update **FINAL**

I've got at least 3 rocks in my small back yard that cause havoc to drive around. My shop is in the back and so is my boat shed. I live in "Roxboro" so go figure.

I want to either use a jack hammer or a rock drill to bust them up to ground level or slightly below. Checked with some countractors around here and still looking. One has a rock drill mounted on a trackhoe but the job is way too small for that.

No chance in digging them up, we are looking at just the tips of much larger rocks in the ground. These pics show a paint can for size reference, one big one and 2 smaller ones side by side. My local rental place has AC and jackhammer but not a rock drill. We talked about a $200 diamond blade on a gas powered saw, but no way to know how many it would take.

Looking for suggestions. No backhoe, no bobcat, no trackhoe. Thanks
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Last edited by polarred21; 06-03-2013 at 06:02 PM.
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Old 04-19-2013, 03:12 PM
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I'm not a contractor but my dad was and I worked on construction sites every summer for longer than I care to remember and I got a pretty good feeling that those rocks are gonna kick the ass of any handheld / manheld tool you bring to them, no matter what kind of diamond tipped tungsten mega-alloy blade or bit you bring to it.

What about getting somebody to blast em? Seriously, it could be the easiest thing.
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Old 04-19-2013, 03:19 PM
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I know you said no trackhoes but I would rent a mini excavator in the 8000-10000 lb class with a breaker attachment or even a bobcat with a breaker. You will be able to break them a few inches below ground and cover with dirt and let the grass grow. I am assuming from the pics the largest one is about 3x5 ft? It should cost around $700 or less to rent both for a day. It should take no more than a few hours to deal with them. And yes I am in the business.
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Old 04-19-2013, 03:32 PM
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Rent a tree stump grinder and take out the optional damage waver.

Without heavy equipment you either have to go the 14" cut off saw which will be dusty as hell and expensive on blades , or a Hilti hammer drill with a few 3/4" genuine hilti bits you can pick up on eBay real cheap. Drill a crap load of systematic holes in them and use a 16lb sledge to bust them apart. You may get lucky and get a few cracks going to remove large chunks.


Good summer long project.
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Old 04-19-2013, 03:33 PM
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Originally Posted by bjm9818 View Post
Rent a tree stump grinder and take out the optional damage waver.
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Old 04-19-2013, 03:55 PM
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I forget what the call it but is some sort of expanding concrete product drill hole fill with product let stand and the stuff cracks them up.
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Old 04-19-2013, 03:56 PM
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thats granite -- hard as all getout -- you wont drill enough holes in a week to break that rock apart -

plant flowers around it --

and yes i know what i talk about -
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Old 04-19-2013, 04:27 PM
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Why not just buy a couple yards of loam and grade over them? They certainly do not look that big and its not like the yard is otherwise perfectly flat or manicured.
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Old 04-19-2013, 04:40 PM
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How 'bout cutting grooves with a diamond blade and use wedges to break it.
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Old 04-19-2013, 04:53 PM
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The biggest rock is maybe 10 feet from the house. Obviously concerned about explosives of any large piece of heavy equipment working on this thing, it may compromise the foundation. Can see all 3 problem rocks here, but I've got 3 more I would hit while I was at it.

The 2 smaller ones don't look like much, but I have to thread my boat trailer between both of them.

I like the Bobcat idea, I've got more rental options 25 to 30 miles away, I will call tomorrow.

Great suggestions...keep em coming
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Old 04-19-2013, 04:53 PM
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Originally Posted by Dead Horse View Post
thats granite -- hard as all getout -- you wont drill enough holes in a week to break that rock apart -

plant flowers around it --

and yes i know what i talk about -
Sure you can, Feathers & Wedges

Feathers are "L" shaped pieces of metal and wedges are.. well, wedges.

A line of holes are drilled along the desired split line. The feathers are dropped in perpendicular to the split line. The wedges are then inserted and tapped into place. After all are in place, start at one end and tap each a little further in. Keep going back and forth on the line until the rock splits.
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Old 04-19-2013, 05:00 PM
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Originally Posted by FASTFJR View Post
Sure you can, Feathers & Wedges

Feathers are "L" shaped pieces of metal and wedges are.. well, wedges.

A line of holes are drilled along the desired split line. The feathers are dropped in perpendicular to the split line. The wedges are then inserted and tapped into place. After all are in place, start at one end and tap each a little further in. Keep going back and forth on the line until the rock splits.
Yes! I have seen this:

Obviously the rocks in the ground would make a difference, and I still need a way to drill the holes. I have a Dewalt hammer drill but not heavy duty. I bought a couple of 1/4 and 3/8 carbide bits from Lowes and maybe got 2 inches adding water before they bit the dust.

Question is if I went this route, what do I need to drill them and where can I get these feathers and wedges?
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Old 04-19-2013, 05:05 PM
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fgastfjr - i agree and do know what feathers are- but i really dont think a home owner understands the work involved to break those rocks --
im thinking most of them are just the tip of very bigger rocks --or the home builder would never have left them in the yard-

btw came from blue rock country and have worked some of it - in a past life
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Old 04-19-2013, 05:08 PM
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hydraulic rock splitter . Drill hole insert splitter and presto ,it breaks .
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Old 04-19-2013, 05:08 PM
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polared - you need a compressor and a rock drill-most likely an 80 pound drill-- a 2 in rock bit - and a case of really cold beer-
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Old 04-19-2013, 05:09 PM
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I would rent a stilh concrete saw with the damage waver and cut slices and then feathers and wedges

or a large excavator with a thumb to dig around and pick them up and toss them over the neighbors fence
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Old 04-19-2013, 05:24 PM
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Go rent 2 big salamander heaters, get them buggers nice and toasty, put on your safety glasses and douse them with cold water. They'll blast themselves apart. Will take some time but your other options equal a massive undertaking.
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Old 04-19-2013, 05:39 PM
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Originally Posted by Dead Horse View Post
im thinking most of them are just the tip of very bigger rocks --or the home builder would never have left them in the yard-
Bingo! I didn't build the house, but this is obvious.
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Old 04-19-2013, 05:51 PM
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Originally Posted by sharktripper View Post
Go rent 2 big salamander heaters, get them buggers nice and toasty, put on your safety glasses and douse them with cold water. They'll blast themselves apart. Will take some time but your other options equal a massive undertaking.
that is actually a really good idea as well

build a big brush fire over them as well or some old tires and diesel fuel and the hit with the hose
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Old 04-19-2013, 06:01 PM
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Originally Posted by polarred21 View Post
The biggest rock is maybe 10 feet from the house. Obviously concerned about explosives of any large piece of heavy equipment working on this thing, it may compromise the foundation. Can see all 3 problem rocks here, but I've got 3 more I would hit while I was at it.

The 2 smaller ones don't look like much, but I have to thread my boat trailer between both of them.

I like the Bobcat idea, I've got more rental options 25 to 30 miles away, I will call tomorrow.

Great suggestions...keep em coming
Your yard is flatter than it looked from the first pics. Grading over would look odd.
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