European Journal of Scientific Research - EuroJournals
European Journal of Scientific Research - EuroJournals
European Journal of Scientific Research - EuroJournals
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Blast-Hole Cuttings: An Indicator <strong>of</strong> Drill Bit Wear in Quarries 724<br />
Figure 2: Plot <strong>of</strong> Wear Rate against Weight <strong>of</strong> Blast-hole Cuttings Retained for Johnson Quarry, Akure.<br />
Figure 3: Plot <strong>of</strong> Wear Rate against Weight <strong>of</strong> Blast-hole Cuttings Retained for Sonel Boneh Quarry, Ibadan.<br />
Table 1: Sieve Analysis <strong>of</strong> Drill Cuttings from Blast-hole One (Geovertrag Quarry, Ado- Ekiti)<br />
Sieve Size (µm) MeanSieve<br />
Size (µm)<br />
Wt<br />
Retained(g)<br />
%Wt<br />
Retained%<br />
Cum Wt<br />
Retained(g)<br />
Cum Wt<br />
Passing(g)<br />
Cum %<br />
Retained<br />
Cum %<br />
Passing<br />
850 850 140.64 35.16 400.00 0 100.00 0<br />
-850 + 600 600 49.60 12.40 259.36 140.64 64.84 35.16<br />
-600 + 425 425 45.20 11.30 209.76 190.24 52.44 47.56<br />
-425 + 300 300 48.96 12.24 164.56 235.44 41.14 58.86<br />
-300 + 212 212 28.40 7.10 115.60 284.40 28.90 71.10<br />
-212 + 150 150 24.80 6.20 87.20 312.80 21.80 78.20<br />
-150 + 75 75 62.40 15.60 62.40 337.60 15.60 84.40<br />
-75 + 63 63 0 0 0 400.00 0 100.00
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