Title page for ETD etd-09082012-040426

Type of Document Master's Thesis
Author Fisher, Frank Tasman
URN etd-09082012-040426
Title A study of the mineralogy of roof and floor strata associated with coal mines
Degree Master of Science
Department Mining Engineering
Advisory Committee
Advisor Name Title
Holland, Charles T. Committee Chair
Nelson, B. W. Committee Member
  • Coal mines and mining
Date of Defense 1961-07-25
Availability restricted

The first conclusion that can be drawn from these results is the extreme variation in the size distribution of the particles of the material. Table nine shows the maximum, average and minimum percentes of each size found in the roof shales, and table ten shows the same factors for the floor clays. From the reported answers to question A we can also see the wide range of opinion concerning roof shales. Of those materials classed as slate, the sand size varied from 1 to 64 percent, while the material reported as draw-slate fell between these limits with a range of sand size from 3 to 38 percent.

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