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Improvement method for loading large diameter vertical Holes Extended Upward with Cylindrical Explosive cartridges
Improvement method for loading large diameter vertical Holes Extended Upward with Cylindrical Explosive cartridges
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机译:圆柱形炸药筒用于加载向上延伸的大直径垂直孔的改进方法
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摘要
A method of charging upwardly extending, large diameter boreholes with cylindrical explosive cartridges is provided employing a longitudinally inflating flexible tube as the pushing mechanism. A fluid-impervious flexible tube is turned over or everted at one end and secured. A fluid, preferably air, at about 3 psi is passed into the tube causing the tube to elongate and the everted tube face to travel along the length of a borehole. An explosive cartridge mounted against the tube face is carried to a desired location in the borehole after which the tube is partly deflated and withdrawn from the borehole.
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