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Uses for Stemlock Gas Bags
       

Use Less Explosives

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Substitute ANFO for Emulsion Blends

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Save 15% to 35% of the total explosive load and still have excellent dig-ability. It's possible to reduce vibration and noise in addition to cost savings.   If your holes have only a few feet of water, try dropping a Gas Bag on the water to seal off the hole. Add a little stemming and use ANFO instead of waterproof explosives. Generally you can use this system up to 8 times the borehole diameter of water.

 

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With a Cavity

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Hole spacing should be 15 to 24 times the borehole diameter in inches depending on the local geology. A good example for many coal highwalls is 18 foot spacing for a 10-5/8" hole.   Plug holes in Vertical Crater Retreat mine methods.