Resources Contact Us Home
Mining method

Image Number 4 for United States Patent #4123109.

A tabular mineral deposit is mined by drilling overlapping holes in the plane of the deposit, the first hole being drilled in any convenient manner and each subsequent hole being drilled by a box hole type machine with a coring bit. The core breaks up and passes out of the core barrel into the orbit of vanes that transfer the broken rock into the hole being lapped. The broken rock is then removed along the hole being overlapped as by means of a drag line scraper.

  Recently Added Patents
Method and apparatus for monitoring wireless communication in hearing assistance systems
Catalysts for polyurethane coating compounds
Process for brominating unsaturated organic compounds with removal of quaternary ammonium or quaternary phosphonium monochlorides
Systems and methods for parameter adaptation
Contact sensor, driver device, and care bed
Image forming apparatus, control method of image forming apparatus, and storage medium
Lamp body with integrally molded heat sink
  Randomly Featured Patents
Controlled reaction L-2R steam turbine blade
Method for bus capacitance reduction
Volume adjuster
Soft start compressor clutch
Railway car tilting stabilizing system
Methods for purification of platelet-derived growth factor
System and method for providing an image deghosting circuit in an electroptic display device
Aiding device, and non-transitory computer-readable recording medium in which design aiding program is stored