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Process for controlling longwall shearing and heading machines along a cutting horizon between coal and rock

  • US 5,193,883 A
  • Filed: 07/15/1991
  • Issued: 03/16/1993
  • Est. Priority Date: 09/25/1989
  • Status: Expired due to Fees
First Claim
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1. A process for controlling reaming and advance machines along a cutting horizon between coal and rock, based on a cutting tool configuration affixed to a machine, fitted with a sensor able to differentiate between coal and rock areas, whose measuring values are transformed into actuating impulses, which guide the cutting tools to the cutting horizon, comprising:

  • taking mineral samples from behind the cutting tool at one of a perpetual rate or short intervals;

    analyzing the mineral samples in the sensor;

    comparing the analysis to a standard value; and

    using deviations from the standard value as measured values for the actuating impulses.

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