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Showing 1 to 2 of 2 for “"rock drill"”.
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Documenting trauma : an analysis of the construction of traumatic collective memory in the first and last scenes of the documentary, Mama Marikana
… the South African Police Service opened fire on rock-drill operators who had gone on a wildcat strike demanding a living wage of R12500, at the Lonmin Platinum mine in Marikana. Thirty-four mineworkers were left dead, seventy-eight were wounded and over two hundred and fifty were arrested. The …
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An axisymmetric finite element solution for elastic wave propagation through threaded connections
… through a series of threaded connections in rock drills. A piston impacts axially on a string of rods held together by threaded joints and the wave propagates through these joints before reaching the bit. The energy lost in the joints limits the maximum effective depth of the drill. Several …