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  2. Grootegeluk Coal Mine - Wikipedia

    en.wikipedia.org/wiki/Grootegeluk_Coal_Mine

    The Grootegeluk Coal Mine is an open cast coal mine within the Waterberg Coalfield of the Limpopo province of South Africa. It is operated by Exxaro . The mine is 25 kilometres (16 mi) from Lephalale , and employs 2,000 people.

  3. Well drilling - Wikipedia

    en.wikipedia.org/wiki/Well_drilling

    Tricone rock bit. Well drilling is the process of drilling a hole in the ground for the extraction of a natural resource such as ground water, brine, natural gas, or petroleum, for the injection of a fluid from surface to a subsurface reservoir or for subsurface formations evaluation or monitoring.

  4. Mining industry of South Africa - Wikipedia

    en.wikipedia.org/wiki/Mining_industry_of_South...

    Premier Diamond Mine, Cullinan, Gauteng, South Africa An aerial view of the Two Rivers mine in Steelpoort, Limpopo, owned by both African Rainbow Minerals and Impala Platinum holdings limited. Mining in South Africa was once the main driving force [ 1 ] behind the history and development of Africa's most advanced and richest economy. [ 2 ]

  5. Borehole - Wikipedia

    en.wikipedia.org/wiki/Borehole

    As the depth of the holes varied, the drilling of a single well could last nearly one full decade. [4] It was not up until the 19th century that Europe and the West would catch up and rival ancient Chinese borehole drilling technology. [10] [5] For many years, the world's longest borehole was the Kola Superdeep Borehole in Russia.

  6. Borehole mining - Wikipedia

    en.wikipedia.org/wiki/Borehole_mining

    Borehole Mining (BHM) is a remote operated method of extraction (mining) of mineral resources through boreholes based on in-situ conversion of ores into a mobile form (slurry) by means of high pressure water jetting (hydraulicking). This process is carried-out from a land surface, open pit floor, underground mine or floating vessel through pre ...

  7. Waterberg Coalfield - Wikipedia

    en.wikipedia.org/wiki/Waterberg_Coalfield

    The Waterberg Coalfield is located in the Limpopo province of South Africa, west of Lephalale. Its dimensions are about 85 kilometres (53 mi) from east to west and about 40 kilometres (25 mi) from north to south. [1] [2] It is part of the same formation as the Mmamabula coalfields in Botswana, to the west.

  8. Baptist well drilling - Wikipedia

    en.wikipedia.org/wiki/Baptist_well_drilling

    Baptist well drilling diagram in Spanish. Baptist well drilling is a very simple, manual method to drill water wells. The Baptist drilling rig can be built in any ordinary arc welding workshop and materials for a basic version costs about 150 US dollars (2006 prices). In suitable conditions, boreholes over 100 m deep have been drilled with this ...

  9. Deep hole drilling - Wikipedia

    en.wikipedia.org/wiki/Deep_hole_drilling

    Deep hole drilling also differs from normal drilling in that, depending on the drilling process and the drilling diameter, cooling lubricant must be pumped to the cutting edges in large quantities and under high pressure. This ensures good cooling and at the same time good lubrication of the contact areas between the workpiece and the cutting ...