An Interactive Computer System for Evaluating Coal Mine Illumination.
NTIS: PB/81-125528 :21 pages
A computer system for calculating the illumination on coal mine surfaces due to machine-mounted lights is described. Utilizing numerical models of mining machinery and measured data on luminaire output characteristics, the program computes the foot-candle levels incident on the mine entry surfaces for any desired machine- luminaire-entry configuration. Shadowing effects of the machine are taken into account. Results are provided at 2-foot intervals on the face, left and right walls, floor, and roof. The system operates interactively from a tektronix 4014 graphics terminal which handles all input-output functions. The software is installed on a cyber 74 computer that communicates with the terminal by a telephone line.
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