http://www.equipmentindustrialmachinery.com/earth-sciences-geology/what-type-of-technique-tools-are-used-to-mine-jasper-effectivelypreferably-no-blasting-or-heavy-machinery/ Ground Engaging Equipment Fri, 18 May 2012 20:19:28 +0000 http://wordpress.org/?v=2.7 hourly 1 http://www.equipmentindustrialmachinery.com/earth-sciences-geology/what-type-of-technique-tools-are-used-to-mine-jasper-effectivelypreferably-no-blasting-or-heavy-machinery/comment-page-1/#comment-26 virtualguy92107 Wed, 22 Oct 2008 05:23:06 +0000 http://www.equipmentindustrialmachinery.com/earth-sciences-geology/what-type-of-technique-tools-are-used-to-mine-jasper-effectivelypreferably-no-blasting-or-heavy-machinery/#comment-26 The substance is wood. You pound a dry wooden wedge into a drilled hole or natural fracture then wet it. The wood swells with tremendous pressure. This method has been used since before recorded history. A faster technique, commonly used today, is wedge and feathering - steel wedges go into drilled holes or natural fractures then steel shims, called "feathers", are pounded in alongside until the rock cleaves. The substance is wood. You pound a dry wooden wedge into a drilled hole or natural fracture then wet it. The wood swells with tremendous pressure. This method has been used since before recorded history. A faster technique, commonly used today, is wedge and feathering - steel wedges go into drilled holes or natural fractures then steel shims, called “feathers”, are pounded in alongside until the rock cleaves.

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