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Application of PercuSsion, Explos ion and Drilling Combined Techinque for Penetration of Large Rolling Rock and Baulders
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TU473.1

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    Abstract:

    Difficulties encountered in drilling large rolling rock and boulders are basically eliminated by useof a combined drilling techitiqee which combines cable pelcussive drilling,explosion with tungston carbide rotary drilling methods.

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  • Published: September 25,1994
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