| 摘要 |
A sampler gathers a portion of borehole cuttings being discharged during a mining drilling operation. The unconfined cuttings are discharged over the sampler while falling to ground surface surrounding the borehole. The sampler diverts a small portion of the flow over two receptacles which are sized to hold a desired volume of cuttings. The receptacles shuttle back and forth over a discharge chute, periodically depositing the desired volume of cuttings into a cuttings container, for subsequent chemical analysis to determine the nature of the ore. A signal derived from the drillstring shaft revolution rate controls the receptacles, so that a sampling is taken at regular drilling depth intervals. A constant, small sample is thus held aside for analysis which is more representative of the soil strata than is a sample obtained by a conventional manual coring operation.
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