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Vol 178
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Separation of drilled cylindrical billet from rock massif

Yu. A. Eist1
P. G. Talalay2
About authors
  • 1 — G.V. Plekhanov Saint Petersburg Mining Institute
  • 2 — G.V. Plekhanov Saint Petersburg Mining Institute
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The cylindrical stone blocks of large diameters (300-800 mm) are used as shafts of papermaking machines, which set up exclusive standards to fissuring of stone. The present paper describes a special device for separation of cylindrical stone blocks from the bottom without destruction of the surrounding rock mass shutting out appearance of fissuring in the stone.

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  1. Борисович В.Т. Подрезка керна при бурении шурфо-скважин и стволов шахт // Изв. вузов. Геология и разведка. 1968. № 12.
  2. Карасев Ю.Г. Процессы и технология горных работ на карьерах стенового и облицовочного камня. М.: Недра, 1996.
  3. Моделирование процесса отделения керна при бурении скважин большого диаметра / В.Т.Борисович, Л.Г.Грабчак, В.А.Плохих, О.Н.Михайлов // Изв. вузов. Геология и разведка. 1968. № 12.

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